uu.seUppsala University Publications
Change search
Refine search result
1234567 1 - 50 of 427
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the 'Create feeds' function.
  • 1.
    Acikkol, Naz
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Testing the Cretaceous Diversity of Ichthyosaurs and Their Extinction Hypotheses Using a Quantitative Approach2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    As portrayed in Before the Dinosaur: the Historical Significance of the Fossil Marine Reptiles, ichthyosaurs, as other Mesozoic marine amniotes, have been unfairly overshadowed by dinosaurs in both popular culture and the field of vertebrate palaeontology. Yet by the effort of dedicated researchers, work on these fish-like marine reptiles had never died out, and in fact a second wave of interest emerged in the late 20th century. Since then, research on ichthyosaurs has focused on discovery of new taxa, assessments of their palaeobiology, and quantitative analyses of their diversity. Despite ever-growing interests, patterns and mechanisms leading up to their extinction in the Cenomanian were insufficiently evaluated. In other words, hypotheses focusing on abrupt extinction linked to a crash in prey diversity, notably belemnites, over a catastrophic event at the end-Cenomanian remain poorly tested. The current project thus aims to test: 1) whether the Cretaceous diversity of ichthyosaurs reflects biological signals, and 2) correlation of their diversity with the diversity of Mesozoic cephalopods, such as belemnites and ammonites. In this regard, a species-level dataset of Cretaceous belemnites including belemnite-bearing formations was built to be employed together with the occurrence-based ichthyosaur and ammonite datasets in the same taxic level. Raw taxic counts, as observed diversities of the clades, were quantified in two different temporal scales, and compared with two sampling proxies. The model-based method was then applied to correct all taxic counts based on the two proxies in both time bins to acquire expected diversities of all the clades. Comparisons resulted in strong correlations between the clades’ observed diversities and proxies exposing biased patterns under the influence of sampling intensity. Whereas both observed and expected diversities show no evidence of a causal relationship between the predator and prey groups, suggesting that the latter’s diversity seems not being a parameter for the former’s, and thus being unsupportive for a prey-driven demise of the predator. Furthermore, the expected trend of ichthyosaurs indicates lower Albian diversity gradually declining towards their extinction in the Cenomanian, which appears to be contrasting with recent studies.

  • 2.
    Adamsson, Karolin
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Kollektivtrafikknutpunkter i Göteborg ur ett genusperspektiv2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This paper will examine two public transportation hubs, as examples of public space, in Gothenburg, Sweden, from a gender perspective by investigate how gender equality is discussed in planning processes of hubs and to explore how hubs are used and perceived by men and women. The thesis has a qualitative and hermeneutic approach, with semi-structured interviews with key persons from the planning processes, and site observations and interviews with men and women using the hubs as the main data gathering methods. In the planning processes for the two cases the ambition was to create hubs that were welcoming for everyone, from a theoretical point of view this ambition could be dangerous from a gender perspective since a planning for everyone often leads to a planning for the man. In order to create hubs for everyone there was a focus for creating safety and increase accessibility for the disabled during the planning processes. The observations and the interviews on site shows that the hubs could be viewed as gender equal since the hubs were open to both men and women to use, but the hubs could also be viewed as not gender equal since women felt unsafe. The analysis shows that the social interaction on site is a crucial factor when defining a place as gender equal or not. The social interaction can be understood by gender contract. One conclusion is that there is a need for discussions about gender and its effect on experiences of public space, where gender contract is problematized. It will otherwise be hard to understand and change the interaction and the gender inequality will risk to consolidate.

  • 3.
    Ahlgren, Joakim
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry, Analytical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Faculty of Science and Technology, Biology, Department of Ecology and Evolution, Limnology. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry.
    Reitzel, Kasper
    Danielsson, Rolf
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry, Analytical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Faculty of Science and Technology, Biology, Department of Ecology and Evolution, Limnology. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry.
    Gogoll, Adolf
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry, Analytical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Faculty of Science and Technology, Biology, Department of Ecology and Evolution, Limnology.
    Rydin, Emil
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry, Analytical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Faculty of Science and Technology, Biology, Department of Ecology and Evolution, Limnology.
    Biogenic phosphorus in oligotropic mountain lake sediments: Differences in composition measured with NMR spectroscopy2006In: Water Research, no 40, 3705-3712 p.Article in journal (Refereed)
  • 4.
    Aleklett, Kjell
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Global Energy Systems.
    Höök, Mikael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Global Energy Systems. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Natural Resources and Sustainable Development.
    Jakobsson, Kristofer
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Global Energy Systems.
    Lardelli, Michael
    School of Molecular and Biomedical Science, University of Adelaide, Australia.
    Snowden, Simon
    Management School, University of Liverpool, United Kingdom.
    Söderbergh, Bengt
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Global Energy Systems.
    The Peak of the Oil Age: Analyzing the world oil production Reference Scenario in World Energy Outlook 20082010In: Energy Policy, ISSN 0301-4215, Vol. 38, no 3, 1398-1414 p.Article in journal (Refereed)
    Abstract [en]

    The assessment of future global oil production presented in the IEA’s World Energy Outlook 2008 (WEO 2008) is divided in to 6 fractions; four relate to crude oil, one to non-conventional oil, and the final fraction is natural-gas-liquids (NGL). Using the production parameter, depletion-rate-of-recoverable- resources, we have analyzed the four crude oil fractions and found that the 75 Mb/d of crude oil production forecast for year 2030 appears significantly overstated, and is more likely to be in the region of 55 Mb/d. Moreover, an alysis of the other fractions strongly suggests lower than expected production levels. In total, our analysis points to a world oil supply in 2030 of 75Mb/d, some 26 Mb/d lower than the IEA predicts. The connection between economic growth and energy use is fundamental in the IEA’s present modeling approach. Since our forecast sees little chance of a significant increase in global oil production, our findings suggest that the ‘‘policy makers, investors and end users’’ to whom WEO 2008 is addressed should rethink their future plans for economic growth. The fact that global oil production has very probably passed its maximum implies that we have reached the Peak of the Oil Age.

  • 5.
    Alexander, Mannelqvist
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Paleontology and Sedimentology of the Alum Shale Formation at Björnberget, Västerbotten County, Sweden2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A new locality of the Alum Shale Formation at Björnberget, Västerbotten County, of the lower allochthon of the Caledonian front is described herein. Two new species of acrotretid brachiopods were found. Tingitanella vilhelminia n. sp. adds another species to the monospecific genus. T. vilhelminia also extend the genus distribution to Sweden. Anabolotreta furcatus n. sp. is the first member of the genus found in Sweden and extend the stratigraphic range to Stage 5 of Cambrian Series 3. It also exhibits an unusual bifurcating shell structure described for the first time herein. One trilobite was found at the locality, Acadoparadoxides torelli, indicating that the exposures at Björnberget belong to the upper Acadoparadoxides (Baltoparadoxides) oelandicus superzone. The fauna found is impoverished in comparison to the fauna that has been described from Jämtland and reflects the depositional environment on the deep outer shelf with low sediment input.

    The known exposure at Granberget, close to Björnberget, is described with respect to the paleontology and sedimentology of the section. The fauna at Granberget could be extended with two new species of agnostids, Hypagnostus lingula and Hypagnostus mammillatus, to a total of six taxa of trilobites. The depositional environment was periodically affected by storms, depositing limestone layers composed of skeletal material. The Alum shale does not exhibit these sedimentary structures and have probably lost the majority of the them during diagenesis.

  • 6.
    Anderson, Lakin
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Measuring Sustainable Cities: An approach for assessing municipal-level sustainability indicator systems in Sweden2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    It is now common for managers, strategists, planners and citizens at municipality level to use sustainable development indicators (SDI) to help them work towards sustainable development. SDI constitute an information system for monitoring, reporting and decision-making which in theory should help us decide how to intervene in natural, economic, social and political systems for a better, more sustainable future. But not all indicator systems are created equal. Some are better tools than others when it comes to helping cities and municipalities in their work, and thousands of municipalities use SDI worldwide. How then should we assess the effectiveness of existing indicators for municipalities?

    To answer this question I develop an approach for assessing the edesign, creation and communication of existing, in-use SDI, and then apply it in a case study in Falun Municipality in Dalarna County, Sweden. The approach assesses five aspects of SDI: ‘Vision’, ‘Framework’, ‘Indicator Selection’, ‘Stakeholder Participation’ and ‘Communication’. The findings in Falun suggest that SDI have been essential to the implementation of sustainable development in policy and action in general municipal operations, but the municipality has not moved beyond a ‘conventional’ sustainable development vision and monitoring strategy. The benefits and constraints of the current indicator system are then discussed using the above approach, and the thesis finishes by offering suggestions for the municipality going forward. I also point to the need to develop a standardised assessment method for thousands of municipalities using indicator systems used today, to help in ongoing review and improvement of SDI in practice.

  • 7.
    Andersson, Hanna
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Bradoriids from the middle Cambrian 'thin' Stephen Formation at Odaray Mountain, Canadian Rocky Mountains.2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Two new species of Cambrian bradoriid arthropods have been found in the ‘thin’ Stephen Formation, Odaray Mountain, Canada; the hipponicharionid Flumenoglacies michaeli n. sp. and the comptalutid Phasoia stephenensis n. sp. This paper includes the description and illustrations of these species as well as two undetermined species from the same locality. Phasoia stephenensis n. sp. is the first Phasoia reported from Laurentia and Flumenoglacies michaeli n. sp. belongs to the new genus Flumenoglacies recently described by Peel & Streng (in press) from Greenland.

    In the discussion previous reports of the genus Phasoia are ordered chronologically and a migration path from Gondwana to Laurentia is suggested. However, more information on the stratigraphic and regional distribution of this taxon is needed to support this theory since Phasoia is so far only known from Australia, South China and now North America.

    The ornamentation of Phasoia stephenensis n. sp. and Flumenoglacies michaeli n. sp. is discussed and compared with the ornamentation of the hipponicharion Pseudobeyrichona longquanxiensis (Cui 1987), the svealutid Tsunyiella Zhang (1974) and the cambriid Petrianna fulmenata Siveter (1995). It is suggested that it might be remnants of a respiratory system. 

  • 8. Andersson, Jan-Olov
    et al.
    Hasselid, Sara
    Widen, Per
    Bax, Gerhard
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Is the Snow Leopard (Unica unica) endangered?: A study of popular viability and distribution using vulnerability and GIS analysis methods2004In: Proceedings of the 7th International Symposium on High Mountain Remote Sensing Cartography, 2004, 224- p.Conference paper (Refereed)
  • 9.
    Anna, Sporre
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics.
    Utvärdering av grumlighet i miljökontrollprogram för ytvatten vid konstruktionsarbeten2015Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    It has been noticed that construction activities close to watercourses often result in turbidity values that exceed guideline values. A detailed analysis of annual reports from the Swedish infrastructure project “BanaVäg i Väst” has shown that recommended values of turbidity often are determined without consideration of natural variations in turbidity. The performance probably depends on the lack of appropriate legislation on acceptable turbidity values and on how turbidity should be monitored during construction activities. The objective of this thesis was therefore to develop a method to determine background values for turbidity as a basis for setting water system adapted reference values. In the thesis a model for turbidity was developed with agricultural area, clay content within the watershed and discharge as input variables. With the dynamic model variations in turbidity could best be explained in watercourses of watersheds less than 100 km2, but even for these watercourses the model performance remained poor. For watercourses draining larger watersheds the model performance became even poorer, most probably due to complex interactions of a variety of driving variables, of which some were not included as input variables. A recommendation is therefore a national initiative where more advanced models can be used, at least for large watercourses that are highly vulnerable, after adaption to Swedish conditions. This study clearly shows that there is an urgent need in Sweden to improve methods to monitor turbidity as well as to improve guideline values by adjusting them according to background turbidity levels.

  • 10.
    Antans, Andis
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Multi-Criteria Decision Analysis in Wind power Project Development: Case study in Latvia2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Wind Power Project Development is a complicated, capital and resource-inclusive process, where a wide variety of factors have to be considered and several stakeholders have a significant say in the process. Decision making in such an environment is complex and has to be approached comprehensively. In order to sustain a structured and clear decision-making process, the sustainable energy industry has recognized Multi-Criteria Decision Analysis (MCDA) method as a suitable set of tools to aid in the decision-making process. One of the MCDA tools – PROMETHEE II, has been examined in this master thesis, to evaluate its eligibility as a decision making aid in wind power project development.

    To structurally and realistically evaluate the tool, it has been applied to a case study in Ventspils region, in Latvia. The author of this thesis has a preliminary agreement with the owners of the sites to develop the project, therefore, this thesis has a strong potential for a practical implementation in future. Four scenarios have been developed for an evaluation, contributing to four variations of the different amount of turbines erected, with two different hub heights, on two differently sized sites. The scenarios are assessed based on the interests of six key stakeholders. Their opinion on twelve criteria is examined.

    Input data for each criterion has been generated via WindPro and MS Excel software or by authors assessment based on the researched literature. PROMETHEE II is used to extrapolate a comprehensive and clear representation of the results.

    The evaluation of the MCDA method proved that MCDA tools, and PROMETHEE II, in particular, can provide excellent support in decision making in wind power development. A wide variety of input data, as well as the various and often contradicting interests by different stakeholders, can be taken into account, while, at the same time, a clear result that can assist in decision making, is generated. 

    Wind Power Project Development is a complicated, capital and resource-inclusiveprocess, where a wide variety of factors have to be considered and severalstakeholders have a significant say in the process. Decision making in such anenvironment is complex and has to be approached comprehensively. In order to sustaina structured and clear decision making process, sustainable energy industry hasrecognized Multi-Criteria Decision Analysis (MCDA) method as a suitable set of tools toaid in the decision making process. One of the MCDA tools – PROMETHEE II, hasbeen examined in this master thesis, to evaluate its eligibility as a decision making aidin wind power project development.To structurally and realistically evaluate the tool, it has been applied on a case study inVentspils region, in Latvia. The author of this thesis has a preliminary agreement withthe owners of the sites to develop the project, therefore, this thesis has a strongpotential for a practical implementation in future. Four scenarios have been developedfor an evaluation, contributing to four variations of different amount of turbines erected, with two different hub heights, on two differently sized sites. The scenarios are assessed based on the interests of six key stakeholders. Their opinion on twelve criteria examined. Input data for each criterion has been generated via WindPro and MS Excel software orby authors assessment based on the researched literature. PROMETHEE II is used to extrapolate a comprehensive and clear representation of the results.The evaluation of the MCDA method proved that MCDA tools, and PROMETHEE II in particular, can provide excellent support in decision making in wind power development. Wide variety of input data, as well as the various and often contradicting interests by different stakeholders can be taken into account, while, at the same time, a clear result that can assist in decision making, is generated.

  • 11.
    Arvestål, Emma
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Changes in Arsenic Levels in the Precambrian Oceans in Relation to the Upcome of Free Oxygen2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Life on Earth could have existed already 3.8 Ga ago, and yet, more complex, multicellular life did not evolve until over three billion years later, about 700 Ma ago. Many have searched for the reason behind this apparent delay in evolution, and the dominating theories put the blame on the hostile Precambrian environment with low oxygen levels and sulphide-rich oceans. There are, however, doubts whether this would be the full explanation, and this thesis therefore focuses on a new hypothesis; the levels of the redox sensitive element arsenic increased in the oceans as a consequence of the change in weathering patterns that followed the upcome of free oxygen in the atmosphere at about 2.4 billion years ago. Given its toxicity, this could have had negative effects upon the life of the time. To test the hypothesis, 66 samples from drill cores coming from South Africa and Gabon with ages between 2.7 and 2.05 Ga were analysed for their elemental composition, and their arsenic content were compared with carbon isotope data from the same samples. These confirmed that a rise in arsenic concentration following the upcome of free oxygen in the atmosphere and the onset of oxidative weathering of continental sulphides. Arsenic, which is commonly found in sulphide minerals, was weathered together with the sulphide and delivered into the oceans, where it in the Palaeoproterozoic increased to over 600% compared to the older Archaean levels, at least locally. Iron had the strongest control over the arsenic levels in the anoxic (ferruginous and sulphidic) oceans, probably due to its ability to remove arsenic through adsorption. During oxygenated conditions, sulphur instead had the strongest influence upon arsenic, likely because of the lack of dissolved iron. The highest arsenic levels were found in samples recognised as coming from oxygenated conditions, although this might be due to the oxygenation state of arsenic affecting its solubility. Arsenic is toxic already at low doses, especially if the necessary arsenic detoxification systems had not yet evolved. However, the lack of correlation between arsenic and changes in δ13C indicated that the increase of arsenic did not affect the primary production between 2.7 and 2.05 Ga. Thus, whether arsenic could have affected the evolution of life during the Mesoproterozoic remains to be shown.

  • 12.
    Arvestål, Emma
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Streng, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    A new species of Cyrtograptus (Graptoloidea) from the Llandovery of Västergötland (Sweden)2011In: The 2nd Wiman Meeting: Carl Wiman's Legacy: 100 years of Swedish Palaeontology, Uppsala, 2011, 2-2 p.Conference paper (Refereed)
    Abstract [en]

    A new species of the genus Cyrtograptus from the late Llandovery of southern Sweden (Västergötland) is presented. The new species has been found near the top of Kinnekulle (Högkullen) in the Retiolites Shales, which are part of the lapworthi zone (late Telychian). Although it resembles the coeval C. lapworthi in appearance, a detailed comparison of the type material of C. lapworthi revealed distinct differences: the new species is more openly coiled in the proximal part, has a larger Two Thecae Repeat Distance (2TRD), and, most significantly, bears a second order cladium. Second order cladia are unknown from C. lapworthi. The new species is also compared with other species of Cyrtograptus that are characterized by second order cladia, such as the cotemporaneous C. laqueus and the slightly younger C. insectus (insectus zone; latest Telychian). However, C. laqueus differs from the new species in having a lower number of thecae separating the cladia, and also by the appearance of its proximal part, which forms a loop by crossing its own main stipe. C. insectus differs by having wider spaced cladia and a stronger coiled proximal part. Furthermore, the need of a redefinition of C. lapworthi is highlighted, due to the large morphological variations within this species.

  • 13.
    Arvestål, Emma
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Streng, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Cyrtograptids from the Telychian (upper Llandovery) of Kinnekulle Mountain, southern Sweden2012Conference paper (Other academic)
  • 14.
    Arvestål, Emma
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Streng, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Cyrtograptids from the Telychian (upper Llandovery) of Kinnekulle Mountain, southern Sweden2013In: GFF, ISSN 1103-5897, Vol. 135, no 1, 45-56 p.Article in journal (Refereed)
    Abstract [en]

    The late Llandovery graptolite fauna of the Retiolites Shales on Kinnekulle Mountain in the province of Västergötland has long been known but never illustrated or studied in detail. New collections of graptolites from an interval at the very top of the exposed succession confirm previous reports of cyrtograptids, which make the shales on Kinnekulle the youngest preserved Palaeozoic rocks in the area. The co-occurrence of Oktavites spiralis and Cyrtograptus lapworthi constrains the strata to the lower lapworthi Biozone of the upper Telychian. The associated graptolite fauna comprises numerous monograptids and Retiolites angustidens as well as Cyrtograptus kinnekullensis n. sp., characterised by its open coiling and the presence of a second-order cladium on the second thecal cladium. This early occurrence of a cyrtograptid species with a second-order cladium on Baltica matches evolutionary patterns observed in Laurentia, suggesting that the ability to grow cladia of both first and higher order evolved approximately, synchronously and at the very beginning of cyrtograptid evolution.

  • 15.
    Bajdek, Piotr
    et al.
    Aleja Najswieztszej Maryi Panny 20-20A, PL-42200 Czestochowa, Poland..
    Qvarnström, Martin
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Owocki, Krzysztof
    Polish Acad Sci, Inst Paleobiol, Twarda 51-55, PL-00818 Warsaw, Poland..
    Sulej, Tomasz
    Polish Acad Sci, Inst Paleobiol, Twarda 51-55, PL-00818 Warsaw, Poland..
    Sennikov, Andrey G.
    Russian Acad Sci, Borissiak Paleontol Inst, Profsoyuznaya 123, Moscow 117997, Russia.;Kazan Fed Univ, Kremlyovskaya 18, Kazan 420008, Russia..
    Golubev, Valeriy K.
    Russian Acad Sci, Borissiak Paleontol Inst, Profsoyuznaya 123, Moscow 117997, Russia.;Kazan Fed Univ, Kremlyovskaya 18, Kazan 420008, Russia..
    Niedzwiedzki, Grzegorz
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Microbiota and food residues including possible evidence of pre-mammalian hair in Upper Permian coprolites from Russia2016In: Lethaia: an international journal of palaeontology and stratigraphy, ISSN 0024-1164, E-ISSN 1502-3931, Vol. 49, no 4, 455-477 p.Article in journal (Refereed)
    Abstract [en]

    Coprolites (fossil faeces) provide direct evidence on the diet of its producer and unique insights on ancient food webs and ecosystems. We describe the contents of seven coprolites, collected from the Late Permian Vyazniki site of the European part of Russia. Two coprolite morphotypes (A, B) contain remains of putative bacteria, cyanobacteria, fungi, protists, invertebrate eggs, arthropod elements, undigested bone and tooth fragments, fish scales and elongated hair-like structures with hollow interiors. Content, size and shape of the coprolites together with the associated body fossil record suggest that the most probable scat-producers were carnivorous tetrapods; the bone-rich morphotype A reveals short food retention time and a fast metabolism and is therefore assigned to therapsid carnivores whereas morphotype B with rarer and degraded bones are assigned to archosauromorphs or other non-therapsid carnivores. The general coprolite matrix contains abundant micron-sized spheres and thin-walled vesicles which are interpreted as oxide and phosphatic pseudomorphs after microbial cells. From analyses of the undigested bones, we infer that they represent remains of actinopterygian fish, a therapsid and unrecognizable parts of amphibians and/or reptiles. Additionally, hair-like structures found in one coprolite specimen occur as diagenetically altered (oxide-replaced) structures and moulds (or partly as pseudomorphs) in a microcrystalline carbonate-fluoride-bearing calcium phosphate. This suggests that the latest Permian therapsids probably were equipped with hair-like integument or hairsuit. If true, this is by far the oldest evidence of this mammalian character in the stem group of mammals.

  • 16.
    Balthasar, Uwe
    et al.
    University of Glasgow.
    Brazeau, Martin
    Brock, Glenn
    Macquarie University, Australia.
    Harper, David
    Durham University.
    Holmer, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    McGowan, Alistair
    Skovsted, Christian B.
    Naturhistoriska Riksmuseet.
    Streng, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Zhang, Zhifei
    Northwest University, Xi'an.
    Early evolution of biomineralization in brachiopods2012Conference paper (Other academic)
  • 17.
    Balthasar, Uwe
    et al.
    University of Glasgow.
    Brazeau, Martin
    Brock, Glenn
    Macquarie University, Australia.
    McGowan, Alistair
    Harper, David
    Holmer, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Skovsted, Christian B.
    Naturhistoriska Riksmuseet.
    Streng, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Zhang, Zhifei
    Brachiopod phylogeny revisited: Using stem groups to flesh out molecular tree topology2011Conference paper (Other academic)
  • 18.
    Bate, Stephen
    et al.
    Royal Holloway Univ London, Quaternary Res Ctr, Dept Geog, Egham TW20 0EX, Surrey, England..
    Stevens, Thomas
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. Royal Holloway Univ London, Quaternary Res Ctr, Dept Geog, Egham TW20 0EX, Surrey, England.; Univ Novi Sad, Fac Sci, Lab Paleoenvironmental Reconstruct, Trg D Obradov 2, Novi Sad 21000, Serbia..
    Buylaert, Jan-Pieter
    Univ Aarhus, Dept Earth Sci, Nord Lab Luminescence Dating, Riso DTU, DK-4000 Roskilde, Denmark.; Ctr Nucl Technol, Riso DTU, DK-4000 Roskilde, Denmark..
    Markovic, Slobodan
    Univ Novi Sad, Fac Sci, Lab Paleoenvironmental Reconstruct, Trg D Obradov 2, Novi Sad 21000, Serbia..
    Roos, Per
    Ctr Nucl Technol, Riso DTU, DK-4000 Roskilde, Denmark..
    Tasic, Nenad
    Univ Belgrade, Fac Philosophy, Dept Archaeol, Belgrade, Serbia..
    Pottery versus sediment: Optically stimulated luminescence dating of the Neolithic Vinca culture, Serbia2017In: Quaternary International, ISSN 1040-6182, E-ISSN 1873-4553, Vol. 429, 45-53 p.Article in journal (Refereed)
    Abstract [en]

    Optically stimulated luminescence (OSL) dating was applied to the Neolithic Vinca culture's type-site, Vinca Belo-Brdo, to establish best protocols for routine luminescence dating of similar Holocene sites, critical in understanding Neolithic to Chalcolithic cultural development. Equivalent dose (De) values were investigated for sediment samples using 63-90 mm grains on large and small aliquots, and single-grain laser luminescence (SGLL), and for pottery samples using large aliquots of 4-11 mm grains. The effects of changing water content and the different techniques available to establish radionuclide concentration were explored for their impacts on dose rate (Dr) estimates. Ages for two pottery samples of 6.74 +/- 0.37 ka and 7.04 +/- 0.47 ka are in line with the existing AMS radiocarbon chronology for the site and are regarded as the best dates available. Sediment samples at Vinca show poor signal strength, and the uncertainty over past water content, in addition to the possibility of mixing and/or partial bleaching of the quartz, means that we do not recommend the use of sediment-derived ages at complex archaeological sites such as Vinca. OSL dating of fired pottery however, presents a powerful tool for generating independent chronologies at archaeological sites as well as providing additional constraints for Bayesian age models.

  • 19.
    Bax, Gerhard
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Remote sensing and 3D visualization of geological structures in mountain ranges:: examples from the Northern Scandinavian Caledonides and the south Tibetan Himalayas2004In: The 26th Nordic Geological Winter Meeting: Abstract volume, 2004, 105- p.Conference paper (Refereed)
  • 20.
    Bax, Gerhard
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Buchroithner, ManfredDepartment of Cartography.
    Proceedings of the 5th International Symposium of the use of Remote Sensing in Maountain Cartography: High-Mountain Remote Sensing Cartography 19982002Conference proceedings (editor) (Refereed)
  • 21.
    Bazzi, Mohamad
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Extinction Dynamics in Selachimorpha: Tracking Dental Morphology Across the K–Pg Boundary2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The study of the effects of the Cretaceous–Palaeogene mass extinction (K–Pg) on Selachimorpha (shark) evolution is limited to assessments of taxonomic richness. Prior work on the fossil record of neoselachians both on a global- and regional scale has shown that sharks achieved great taxonomic diversity in the Late Cretaceous but were subsequently punctuated by the K–Pg extinction. The ecological significance of this bioevent on global shark communities is particularly poorly understood with contrasting views on patterns of extinction selectivity. Similar to actinopterygian fishes, the extinction of sharks was focused on large-bodied pelagic piscivorous. However, patterns of trophic selectivity in sharks were recently contested and posited as random with respect to environment and ecology. Following the extinction at the K–Pg boundary, the ecological role of sharks in the earliest Palaeocene is said to have diminished and contrary to actinopterygian fishes did not experience an adaptive radiation.Current analyses are based on assessments of taxonomic diversity and absolute faunal abundance, and lack the necessary morphological framework with which to adequately test ecological dynamics in sharks across the K–Pg. To test both previous and newly formulated macroevolutionary hypotheses, shark tooth morphology was quantified via landmark- and semilandmark-based geometric morphometrics and used to reconstruct patterns of disparity and morphospace occupation across the K–Pg boundary. The newly assembled morphometric dataset comprises 1457 shark teeth spanning the Maastrichtian–Palaeocene compiled from published images.The results reveal (1) near-stasis in dental-shape disparity in Selachimorpha (globally) across the K–Pg boundary, and (2) a decrease in morphospace occupation associated with cutting-type dentitions. Considered jointly, observed disparity and morphospace patterns in Selachimorpha do not conform to the predictions of a non-random extinction model. However, dissecting patterns of disparity and morphospace occupation along phylogenetic lines reveal differential responses to the extinction, affirming phylogenetic selectivity with trophic implications.Testing for ecological release in sharks, using disparity dynamics in lamniforms and carcharhiniforms as a model, is shown to be complex. Pattern across the extinction event reveal an increase in tooth morphologies of carcharhiniforms in previously underexplored area of morphospace that were previously occupied by lamniforms, an area corresponding to macropredaceous forms (e.g. anacoracids and pseudocoracids). However, the observed increases in cutting-type dentitions in carcharhiniforms are largely driven by the proliferation of triakids, that are not ecologically equivalent to macropredatory lamniforms. I suggest that the combined effect of a selective decline in lamniform ecodiversity and the diversification of mid-trophic small-sized pelagic bony fish triggered the post-Cretaceous diversification of triakids. The K–Pg boundary was therefore crucial in setting the stage for the carcharhiniform-dominated selachimorph community that can be seen today.

    The full text will be freely available from 2018-01-01 20:00
  • 22.
    Bazzi, Mohamad
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Einarsson, Elisabeth
    Lund University.
    Kear, Benjamin
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. Uppsala University, Music and Museums, Museum of Evolution.
    Late Cretaceous (Campanian) actinopterygian fishes from the Kristianstad Basin of southern Sweden2016In: Mesozoic Biotas Of Scandinavia And Its Arctic Territories, Geological Society, 2016, 277-292 p.Chapter in book (Refereed)
    Abstract [en]

    Although a diverse range of aquatic vertebrates are documented from the Upper Cretaceous (mid-Campanian) marine strata of the Kristianstad Basin in southern Sweden, only chondrichthyans and marine amniotes have been described in detail to date. In contrast, coeval actinopterygians are virtually unreported, yet their remains are extremely abundant at most sampled localities. A comprehensive assessment of these fossils has identified the first Late Cretaceous actinopterygian fauna from the Fennoscandian Shield, incorporating indeterminate lepisosteids, the durophagous pycnodontid Anomoeodus subclavatus, the predatory pachycormid Protosphyraena sp., a large ichthyodectid, pachyrhizodontids resembling Pachyrhizodus, the enchodontid Enchodus cf. gladiolus and indeterminate small teleosts. These taxa are diagnosed mainly from isolated teeth and scales, implying substantial taphonomic loss prior to burial. Moreover, the prolific recovery of actinopterygian skeletal remnants in recent excavations suggests that historical collecting biases, rather than ecological paucity, have contributed to their under-representation in the Swedish Cretaceous record. Palaeobiogeographically, the Kristianstad Basin actinopterygians show compositional resemblance to assemblages from the Northern European Platform and the Western Interior Seaway of North America, advocating distributional communication across the Boreal proto-Atlantic Ocean.

  • 23.
    Berg-Madsen, Vivianne
    et al.
    Uppsala University, Music and Museums, Museum of Evolution.
    Ebbestad, Jan Ove R.
    Uppsala University, Music and Museums, Museum of Evolution.
    Lars Roberg och trilobiterna2015In: Geologiskt forum, Vol. 22, no 4, 22-23 p.Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Den 18 juni 1715 försvarades uppsatsen De Fluviatili Astaco ejusque usu medico vid Uppsalauniversitet. Författaren var Lars Roberg ochämnet var kräftdjur av olika slag. Arbetet innehöllen figur och på denna avbildades tre fossil;en krabba och två svanssköldar från trilobiter. Fossil hade aldrig tidigare avbildats i trycktaarbeten i Sverige, och därmed blev Lars Robergför trehundra år sedan den första i Sverige attillustrera fossil, därtill även svenska sådana.

  • 24.
    Biro, Josephine
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Kommuners bedömningar i masshanteringsfrågor2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I bygg- och anläggningsarbeten uppkommer jord- och bergmassor vilka utgör fasta eller lösa markmaterial som måste grävas upp, förflyttas eller kan användas i byggnadsprocessen. Detta kallas med ett samlingsnamn för masshantering och hur den sker beror på hur massorna klassas, vad de innehåller och hur de är tänkta att användas i framtiden.                       Det är landets kommuner som är tillsynsmyndighet för masshantering och till hjälp i beslutsfattandet finns ett juridiskt reglerverk som definierar när massor utgör ett avfall, kan återanvänds eller kan återvinnas. Det finns även vägledning från Naturvårdsverket i form av rapporter och handböcker. Denna undersöknings syfte är att genom kvalitativa intervjuer och kvalitativ analys ta reda på hur tre utvalda kommuner (Linköping, Sigtuna och Söderhamn) använder sig av och tolkar det juridiska regelverket och Naturvårdsverkets vägledning för bedömningar i masshanteringsärenden. Undersökningens resultat visar att alla de undersökta kommunerna använder det juridiska regelverket och Naturvårdsverkets rapport 5976 ”Riktvärden för förorenad mark” (där riktvärden för känslig markanvändning och mindre känslig markanvändning definieras) på likartade sätt. Däremot skiljer sig tolkningen och tillämpningen av Naturvårdsverkets handbok 2010:1 ”Återvinning av avfall i anläggningsarbeten” (där riktvärden för mindre än ringa risk, ringa risk, mer än ringa risk samt nivåer för deponitäckning definieras) mellan kommunerna. Orsakerna till detta varierar från kommun till kommun.

  • 25.
    Björgúlfsson, Páll
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Numerical Model of a Fossil Hydrothermal System in the Southern East Pacific Rise Exposed at Pito Deep2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The Mid Ocean Ridge system with its volcanism and related hydrothermal activity has been a subject for many studies since the discovery of high temperature hydrothermal vents at the ridge surfaces in the 1970´s. This thesis focuses on deep sea hydrothermal activity on a superfast spreading ridge, the SouthernEast Pacific Rise (SEPR).The ridge is located in the South Pacific, off the coast of South America, and separates the Nazca Plate and the Pacific Plate. A fossil high temperature hydrothermal zone hosted by a fault was sampled 80 m below the lava/dike transition zone in the Pito Deep (a tectonic window intothe SEPR). Geochemical data from the fault zone indicates that cold (<150°C)and hot (<390°) fluids coexisted at the same time whilst the hydrothermal system was active. A numerical model (HYDROTHERM) developed by the USGS was used to recreate the geological settings in the SEPR in order to try to model the hydrothermal activity and fluid flow. The model solves two governingpartial differential equations numerically, the water component flow equation(Darcy law for flow in porous media) and the thermal energy transport equation(conservation of enthalpy for the water component and the porous media). The result of the modeling indicates that cold seawater can penetrate from the relatively permeable volcanic material into a highly permeable fault zone in the sheeted dike unit. The cooler seawater fluid flows down the fault zone,reheats and flows up again in a narrow upflow zone at the edge of the fracture/sheeted dike boundary. The result is a horizontal temperature gradient created in the fractured zone supporting the theory that hot and cold fluids can coexist in a fault hosted hydrothermal zone.

  • 26.
    Blazeviciute, Lina
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Illustrative ElectricitySupply Scenarios and Sustainable Development in Lithuania2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Lithuania has limited domestic energy resources, and is therefore, heavily dependent on imports of oil products and natural gas. Lithuania imported around 90% of its oil and 100% of natural gas in 2009. Particularly, after the accession to the European Union (EU), and decommissioning of main electricity generation source Ignalina Nuclear Power Plant (NPP), energy security became one of the main concerns. Therefore, it is vital to evaluate different pathways the country could take in order to achieve desirable energy security, and ensure sustainable development of the energy system in Lithuania. The study was conducted using LEAP, the Long range Energy Alternatives Planning System, to develop energy policy analysis. Different scenarios presented in the report show how Lithuanian energy system would react in given different circumstances. Moreover, it demonstrates how implementation of existing energy projects separately or combined together would affect the level of energy security and sustainability in Lithuania.

    The research shows that current government policies could lead Lithuania to more secure and sustainable energy future. However, in a long run higher investments in renewable energy might be more environmentally and economically competitive alternative.

  • 27.
    Boldkhuyag, Enkhtuya
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Values and pro environmental behaviour among Mongolian adolescents:Implications for ESD2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The study aims to contribute in the understanding of key values and behaviours for

    Education for sustainable development and their correlations and to further develop

    knowledge about how they are distributed among upper secondary school students in

    relation to socio-demographic factors. There were 274 surveys collected in 5 different

    schools in Ulaanbaatar and analysed using ANOVA followed by Tukey test and

    Pearson’s correlation tests.

    The study supports the findings of previous research that universal, benevolence and

    traditional values are positively correlated with a positive environmental behaviour.

    The positive orientation towards sustainability suggest that the current adolescent

    Mongolian population can become potential environmental supporters with a strong

    motivation towards sustainable behaviour and attitudes. The demographic and social

    factors were weak in relation to value orientations, no significant difference observed

    in value orientation. There was a notable gender difference in pro environmental

    behaviour which aligned with many existing academic studies.

    Social factors in relation to environmentally friendly attitude suggested that pro

    environmental adolescents were somehow exposed to the natural environment and

    read books during their free time displayed increasingly positive behaviour toward the

    environment. Therefore this study emphasises the importance of encouraging informal

    outdoor activities and increasing the access and popularity of reading books among

    youths. These measures would also serve to strengthen the benevolence value and

    promote pro environmental behaviour.

  • 28.
    Boonstra, Wiebren J.
    et al.
    Stockholm Univ, Stockholm Resilience Ctr, S-10691 Stockholm, Sweden..
    Hanh, Tong Thi Hai
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Natural Resources and Sustainable Development.
    Adaptation to climate change as social-ecological trap: a case study of fishing and aquaculture in the Tam Giang Lagoon, Vietnam2015In: Environment, Development and Sustainability, ISSN 1387-585X, E-ISSN 1573-2975, Vol. 17, no 6, 1527-1544 p.Article in journal (Refereed)
    Abstract [en]

    The ways in which people respond to climate change are frequently analyzed and explained with the term "adaptation." Conventionally, adaptation is understood as adjustments in behavior either to mitigate harm or to exploit opportunities emerging from climate change. The idea features prominently in scientific analyses as well as in policy programs. Despite its growing popularity over the years, the concept has also received critique. Social scientists in particular take issue with the implicit assumptions about human behavior and "fitness advantages" (or optimal behavior) that come with the term. Clearly, not all human and animal behavioral responses are "optimal" or display "fitness advantages." To the contrary, sub-optimal and maladaptive behavior is rather widespread. Explaining the possibility of maladaptive or sub-optimal behavior led scholars to introduce the idea of "traps." Trap situations refer to a mismatch between behavior and the social and/or ecological conditions in which this behavior takes place. This paper reviews the analytical value of traps for the study of human responses to climate change. It first lays out the theoretical assumptions underpinning the concept. A case study of the Tam Giang Lagoon, in central Vietnam, is used to evaluate how well the trap concept captures the sub-optimality and variety of human responses to climate change.

  • 29.
    Bordiga, Manuela
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Bartol, Milos
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Henderiks, Jorijntje
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Absolute nannofossil abundance estimates: quantifying the pros and cons of different techniques2015In: Revue de Micropaléontologie, Vol. 58, no 3, 155-165 p.Article in journal (Refereed)
    Abstract [en]

    A quick and inexpensive method to determine absolute nannofossil abundance in deep sea sediments – the “drop” technique (modified dilution method) – was compared to two other available methods – the filtration and random settling techniques. All techniques rely on the same basic principle, under which a volume of known concentration (bulk sediment weight/mL) is distributed evenly over a known total area (glass slide or filter) to then count particles within a set of (randomly) selected fields of view. The three preparation techniques were also calibrated by spiking the samples with microbeads to approach the “real values” as closely as possible. Significant offsets in abundance estimates between methods mainly reflect bias due to the uneven distribution and/or loss of particles. We show that the drop technique is most consistent and accurate in estimating “real values” and offers similar or better reproducibility than the other techniques. The drop method also allows detection of the same trends with or without calibration with microbeads. The filtration method holds the risk to drastically underestimate absolute abundances, while the settling technique is demanding in terms of time and may suffer from advection processes. The composition of nannofossil assemblages can be reliably determined by any of the three different techniques.

  • 30.
    Borgersen, Anna
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Business models for sustainable investments in the context of tropical forest restoration2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The Tropics continue to provide the most biologically diverse and carbon rich forest in the world, but they are being lost at alarming rates. To meet the global climate change targets and the UN sustainable development goals, financing is urgently needed to speed up and increase tropical forest restoration. The aim of this thesis is to show that sustainable timber and non-timber forest products offer are a viable vehicle for investment in tropical forest restoration and to identify the needed incentives and tools to enable sustainable investment.

     

    There is a lack of research on the integration between business model design and sustainability generally and an absence of business models for tropical forest restoration. Very little research if any, has been undertaken to link the two and evaluate the feasibility of applying business models on tropical forest restoration, especially with regard to its potential as an interesting investment option. This thesis gives a background about tropical forest restorations, sustainable investment, presents three tropical reforestation projects and a conceptual framework. The conceptual framework will be used to evaluate the potential for business model application to finance restoration and enable sustainable investments.

     

    Using a business model for tropical forest restoration projects, which in most cases are not defined as businesses, is an innovative approach and an agent of needed radical change. A business model is a crucial strategic management tool to enable success of tropical forest restorations. The core logic of the business model can offer equitable customer value and the fulfillment of new types of needs. Merging economic development and forest restoration is a powerful tool for innovation. The critical variables for financing are management, monitoring, operational efficiency, political incentives and regulations, stakeholder involvement, community benefits, transparency and information communication technology.

  • 31.
    Borinder, Niclas
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Postcranial anatomy of Tanius sinensis Wiman, 1929 (Dinosauria; Hadrosauroidea)2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Tanius sinensis Wiman, 1929 was one of the first hadrosauroid or “duck-billed” taxa erected from China, indeed one of the very first non-avian dinosaur taxa to be erected based on material from the country. Since the original description by Wiman in 1929, the anatomy of T. sinensis has received relatively little attention in the literature since then. This is unfortunate given the importance of T. sinensis as a possible non-hadrosaurid hadrosauroid i.e. a member of Hadrosauroidea outside the family of Hadrosauridae, living in the Late Cretaceous, at a time when most non-hadrosaurid hadrosauroids had become replaced by the members of Hadrosauridae. To gain a better understanding of the anatomy of T. sinensis and its phylogenetic relationships, the postcranial anatomy of it is redescribed. T. sinensis is found to have a mosaic of basal traits like strongly opisthocoelous cervical vertebrae, the proximal end of scapula being dorsoventrally wider than the distal end, the positioning of the ventral apex of the supra-acetabular process of the ilium, posterodorsally to the ischial peduncle, the ratio between the proximodistal length of the metatarsal III and the mediolateral width of this element being greater than 4.5. Derived traits present in T. sinensis include curved dorsal surface of the scapula, arcuate fourth trochanter of the femur, cnemial crest of the tibia extending ventrally into the proximal half of the shaft, and the distal end of the fibula expanding into a club shape in lateral view. A potential autapomorphy is noted, being the caudal fusion of the medial and lateral condyles of the femur forming a completely enclosed “tunnel”. The body mass of the holotype of T. sinensis, is also estimated, and found to have been around 2950 kg. The phylogenetic analysis agrees with previous studies placing T. sinensis as a non-hadrosaurid hadrosauroid. Furthermore, in the phylogenetic analysis, T. sinensis is recovered as non-hadrosaurid hadrosauroid, forming a clade with Bactrosaurus johnsoni Gilmore, 1933, which shares the following unambiguous synapomorphies; the width of the orbital margin of the jugal being almost equally wide to that of the infratemporal margin of the bone; the ratio between the mediolateral width of the skull roof across the postorbitals and that across the quadrate cotyli of the paired squamosals being more than 1.20.

  • 32.
    Borinder, Niclas H.
    et al.
    Uppsala University, Music and Museums, Museum of Evolution.
    Poropat, Stephen F.
    Australian Age Dinosaurs Nat Hist Museum, Winton, Qld 4735, Australia.;Monash Univ, Wellington Rd, Clayton, Vic 3800, Australia..
    Kear, Benjamin P.
    Uppsala University, Music and Museums, Museum of Evolution.
    Reassessment of the earliest documented stegosaurian fossils from Asia2016In: Cretaceous research (Print), ISSN 0195-6671, E-ISSN 1095-998X, Vol. 68, 61-69 p.Article in journal (Refereed)
    Abstract [en]

    In 1929, the famous Swedish palaeontologist Carl Wiman documented the first unequivocal stegosaurian dinosaur fossils from Asia. His material comprised an isolated dermal spine, together with a dorsal vertebra that was briefly described but never figured. Since then these remains have languished in obscurity, being noted in some stegosaur review articles but often ignored altogether. However, recent auditing of the Museum of Evolution palaeontological collection at Uppsala University in Sweden has led to the rediscovery of Wiman's original specimens, as well as two additional previously unrecognised stegosaurian dorsal vertebrae. All of these bones derive from the Lower Cretaceous (Berriasian-Valanginian) Mengyin Formation of Shandong Province in eastern China, and are morphologically compatible with the stratigraphically proximal stegosaurian taxon Wuerhosaurus from the Valanginian-Albian Tugulu Group in the Xinjiang Uyghur Autonomous Region of Western China. Wirnan's seminal stegosaurian fossils thus expand current palaeobiogeographical distributions, and contribute to the otherwise enigmatic record of Early Cretaceous stegosaurian occurrences.

  • 33.
    Boström, Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Avrinningens variation i det boreala landskapet: - en fallstudie i Strömsjöliden2015Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 34. Botting, Joseph P.
    et al.
    Cardenas, Paco
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Division of Pharmacognosy. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Systematic Biology.
    Peel, John S.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    A Crown-Group Demosponge from the Early Cambrian Sirius Passet Biota, North Greenland2015In: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 58, no 1, 35-43 p.Article in journal (Refereed)
    Abstract [en]

    Calibration of the divergence times of sponge lineages and understanding of their phylogenetic history are hampered by the difficulty in recognizing crown versus stem groups in the fossil record. A new specimen from the lower Cambrian (Series 2, Stage 3; approximately 515Ma) Sirius Passet Biota of North Greenland has yielded a diagnostic spicule assemblage of the extant demosponge lineages Haploscleromorpha and/or Heteroscleromorpha. The specimen has disarticulated approximately in situ, but represents an individual sponge that possessed monaxon spicules combined with a range of slightly smaller sigma, toxa and unique spiral morphologies. The combination of spicule forms, together with their relatively large size, suggests that the sponge represents the stem lineage of Haploscleromorpha+Heteroscleromorpha. This is the first crown-group demosponge described from the early Cambrian and provides the most reliable calibration point currently available for phylogenetic studies.

  • 35.
    Bovin, Kajsa
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Avgränsning av tillrinningsområden till grundvattenmagasin: vilken information ger berggrundens överyta?2011Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Delineation of recharge areas for aquifers is performed in the groundwater mapping process at the Swedish geological survey, SGU. This work is time consuming and performed manually. It is therefore desirable to develop a more general and repeatable method for defining recharge areas for aquifers.

    The purpose of this study was to investigate two other possible methods to delineate recharge areas for aquifers. The first method was to examine the possibility of using the topography of the bedrock to define the recharge areas for aquifers. To enable this, a method for generating the topography of the bedrock was developed. The recharge area could then be defined by using the Arc Hydro Tools in ArcMap. The second method was to examine whether topographic water divides delimited from the ground surface topography could be used to delineate recharge areas for aquifers. For this purpose, topographic water divides from Svenskt Vatten ARkiv (SVAR) were used.

    The results show that it is possible to generate the topography of the bedrock by using information about the soil depth from the databases at SGU for small areas with a lot of data. In order to do the same over a larger area, for example the whole of Sweden, more data and perhaps other methods are needed. The topography of the bedrock gives a lot of new information in areas where the topography of the groundwater surface does not follow the topography of the ground surface, for example where deep soils with high hydraulic conductivity occur. In the outer part of the recharge areas thin layers of soil and outcrops often occur. This means that the topography of the bedrock is very similar to the topography of the ground surface and therefore does not give much new information.

    Recharge areas delineated from the bedrock topography are very large. This method is not complex enough to calculate the delineation of recharge areas using only the bedrock topography as an input. However, the bedrock topography can be used together with other information, especially the topography of the groundwater surface but also information about soil types and bedrock. The bedrock topography can also serve as background information in the work with delimiting recharge areas as it is done today.

    It is further shown that the topographic sub-catchments from SVAR are not suitable for defining recharge areas for aquifers. This is partly because the areas of the sub-catchments are entirely dependent on which point they are defined from and these points are chosen arbitrarily along the streams, and partly because the drainage direction of the sub-catchments is difficult to take into account when using this method.

  • 36.
    Bray, Jamieson
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Cultural Cognition and Climate Change: Communicating climate science across potential divides in Sweden2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Human civilization is failing in the fight to reduce carbon dioxide emissions and limit the impact of anthropogenic climate change. Whilst there are likely numerous reasons for this inertia, societal risk perception plays a fundamental role in influencing the speed and effectiveness of political and social action to address climate change. This study presents the psychological, sociological and cultural reasons for variations in the perceptions of risk amongst a group of climate change sceptics in Sweden. Highlighting cognitive barriers and characteristics associated with different ideological biases and worldviews. The paper concludes that people become more or less sceptical to climate change based on a variety of potentially intersectional issues. Whilst gender, age and wisdom all play a role, the social groups with which people identify, as well as individuals’ values and ideas of what constitutes an ideal society ultimately shape ones perception of risk in relation to climate change. The implications for the communication of climate science are discussed, revealing that any inclusive communication strategy will fail unless it is presented in a way that affirms rather than challenges one’s cultural identity.

     

  • 37.
    Bremer, Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Distribution of Silurian vertebrates on Gotland, Sweden2016Conference paper (Other academic)
  • 38.
    Bremer, Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Geology, stratigraphy, and fossil vertebrates of Gotland, Sweden: a review2016Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The Silurian limestones of Gotland, Sweden, and their exceptionally well-preserved fossils have attracted the interest of scientists for more than 200 years. The sedimentary rocks represent approximately 10 million years of time, and were deposited in a shallow, equatorial inland sea named the Baltic Basin. The majority of the sediments are composed of reef-associated strata, but a general transition can be seen along the strike from shallow water in the northeast to deeper shelf environments in the southwest. The understanding of the stratigraphy and the geology of Gotland has greatly improved during the last decades. This research on Gotland has also led to the discovery of a series of stable isotope excursions and extinctions among several faunal groups. These events were probably linked to cycles in atmospheric and oceanic states, and three of them have been recognized globally. The Baltic Basin was also home to a variety of early vertebrates. The first fossil vertebrates from Gotland were reported in 1861, but the most extensive study of these early fishes was performed in the late 1900s. More recently it was shown that the vertebrates were also affected by one of the extinction events. This thesis is an extensive review of previous work and will form a geological basis for future studies. In this work, all previous reports of vertebrates have been gathered, reviewed, and the old samples have been placed in an updated stratigraphical framework. The scale taxonomy of Gotland vertebrates, including the Baltic acanthodians, has been evaluated and partly revised. Additionally, the depositional environments of the sampled areas have been investigated. Studying the vertebrates of Gotland is important for understanding the distribution of vertebrates through time and in different environments during the Silurian. Initial results indicate environmental preferences among vertebrates on both group and species-level, which may prove useful for testing the vertebrate biozonation developed for the Silurian.

    List of papers
    1. An updated stratigraphic and environmental framework for the distribution of Silurian vertebrates on Gotland
    Open this publication in new window or tab >>An updated stratigraphic and environmental framework for the distribution of Silurian vertebrates on Gotland
    2015 (English)In: Estonian journal of earth sciences, ISSN 1736-4728, E-ISSN 1736-7557, Vol. 64, no 1, 13-18 p.Article in journal (Refereed) Published
    Keyword
    vertebrate distribution, stratigraphy, facies, Silurian events, Gotland, Sweden
    National Category
    Developmental Biology Earth and Related Environmental Sciences
    Identifiers
    urn:nbn:se:uu:diva-251824 (URN)10.3176/earth.2015.03 (DOI)000351327700004 ()
    Available from: 2015-04-27 Created: 2015-04-24 Last updated: 2017-08-21
    2. Vertebrate microremains from the upper Silurian Winnica Formation of the Holy Cross Mountains, Poland
    Open this publication in new window or tab >>Vertebrate microremains from the upper Silurian Winnica Formation of the Holy Cross Mountains, Poland
    Show others...
    2017 (English)In: Geological Magazine, ISSN 0016-7568, E-ISSN 1469-5081, 1-19 p., doi:10.1017/S0016756817000681Article in journal (Other academic) Epub ahead of print
    National Category
    Other Earth and Related Environmental Sciences
    Identifiers
    urn:nbn:se:uu:diva-281657 (URN)10.1017/S0016756817000681 (DOI)
    Available from: 2016-03-29 Created: 2016-03-29 Last updated: 2017-09-04
  • 39.
    Bremer, Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Silurian vertebrates of Gotland (Sweden) and the Baltic Basin2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    During the Silurian, the Swedish island Gotland was positioned close to the equator and covered by a shallow sea called the Baltic Basin. The sedimentary rocks (predominantly carbonates) comprising most of the island today were initially formed in this warm sea, and the relatively complete succession of rocks often contains fossil fragments and scales from early vertebrates, including heterostracans, anaspids, thelodonts, osteostracans, acanthodians, and a stem-osteichthyan. Fossils of early vertebrates become increasingly more common in younger Silurian rocks, but are mostly represented by fragmentary remains and rarer occurrences of articulated jawless vertebrates (agnathans). However, the record of articulated specimens and jawed vertebrates (gnathostomes) are more numerous in rocks of the following Devonian Period. Isolated peaks of agnathan diversity during the Silurian and disarticulated remains of gnathostomes from this period hint at a cryptic evolutionary history. A micropaleontological approach with broader sampling may provide a better understanding of early vertebrate distribution patterns and hopefully give some insights into this history. The objective of this study was to build upon previous sampling on Gotland and to use established frameworks for disarticulated remains with the aim of making comparisons with similar studies performed in the East Baltic. However, difficulties locating the collections from these previous works necessitated a different focus. Undescribed museum collections and newly sampled material enabled some taxonomical revisions and greatly improved the understanding of vertebrate distribution in the youngest part of the Gotland sequence. It also indicated that this interval may represent the early stages of the diversification of gnathostomes that become increasingly dominant toward the end of the Silurian. Furthermore, the description of samples from partly coeval sections in Poland enabled some preliminary comparisons outside of Gotland, and presented a striking example of restricted environmental occurrences for a thelodont taxon. This is encouraging for future sampling and investigations on Gotland. Together with the establishment of a facies-framework comparable to that developed in the East Baltic and correlations to other areas, this may prove fruitful for an increased understanding of early vertebrate distribution and evolution during the Silurian.

    List of papers
    1. An updated stratigraphic and environmental framework for the distribution of Silurian vertebrates on Gotland
    Open this publication in new window or tab >>An updated stratigraphic and environmental framework for the distribution of Silurian vertebrates on Gotland
    2015 (English)In: Estonian journal of earth sciences, ISSN 1736-4728, E-ISSN 1736-7557, Vol. 64, no 1, 13-18 p.Article in journal (Refereed) Published
    Keyword
    vertebrate distribution, stratigraphy, facies, Silurian events, Gotland, Sweden
    National Category
    Developmental Biology Earth and Related Environmental Sciences
    Identifiers
    urn:nbn:se:uu:diva-251824 (URN)10.3176/earth.2015.03 (DOI)000351327700004 ()
    Available from: 2015-04-27 Created: 2015-04-24 Last updated: 2017-08-21
    2. End-Wenlock terminal Mulde carbon isotope excursion in Gotland, Sweden: Integration of stratigraphy and taphonomy for correlations across restricted facies and specialized faunas
    Open this publication in new window or tab >>End-Wenlock terminal Mulde carbon isotope excursion in Gotland, Sweden: Integration of stratigraphy and taphonomy for correlations across restricted facies and specialized faunas
    Show others...
    2016 (English)In: Palaeogeography, Palaeoclimatology, Palaeoecology, ISSN 0031-0182, E-ISSN 1872-616X, Vol. 457, 304-322 p.Article in journal (Refereed) Published
    National Category
    Earth and Related Environmental Sciences
    Research subject
    Earth Science with specialization in Historical Geology and Palaeontology
    Identifiers
    urn:nbn:se:uu:diva-299498 (URN)10.1016/j.palaeo.2016.06.031 (DOI)000380598800025 ()
    Available from: 2016-07-21 Created: 2016-07-21 Last updated: 2017-08-21
    3. Vertebrate remains and conodont biostratigraphy in the Ludlow Burgsvik Formation of Gotland, Sweden
    Open this publication in new window or tab >>Vertebrate remains and conodont biostratigraphy in the Ludlow Burgsvik Formation of Gotland, Sweden
    (English)Manuscript (preprint) (Other academic)
    National Category
    Earth and Related Environmental Sciences
    Identifiers
    urn:nbn:se:uu:diva-328226 (URN)
    Available from: 2017-08-20 Created: 2017-08-20 Last updated: 2017-08-25
    4. Vertebrate dermal remains and conodont distribution in the upper Silurian Hamra and Sundre formations of Gotland, Sweden
    Open this publication in new window or tab >>Vertebrate dermal remains and conodont distribution in the upper Silurian Hamra and Sundre formations of Gotland, Sweden
    (English)Manuscript (preprint) (Other academic)
    National Category
    Earth and Related Environmental Sciences
    Identifiers
    urn:nbn:se:uu:diva-328227 (URN)
    Available from: 2017-08-20 Created: 2017-08-20 Last updated: 2017-08-21
    5. Vertebrate microremains from the upper Silurian Winnica Formation of the Holy Cross Mountains, Poland
    Open this publication in new window or tab >>Vertebrate microremains from the upper Silurian Winnica Formation of the Holy Cross Mountains, Poland
    Show others...
    2017 (English)In: Geological Magazine, ISSN 0016-7568, E-ISSN 1469-5081, 1-19 p., doi:10.1017/S0016756817000681Article in journal (Other academic) Epub ahead of print
    National Category
    Other Earth and Related Environmental Sciences
    Identifiers
    urn:nbn:se:uu:diva-281657 (URN)10.1017/S0016756817000681 (DOI)
    Available from: 2016-03-29 Created: 2016-03-29 Last updated: 2017-09-04
  • 40.
    Bremer, Oskar
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Blom, Henning
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Biostratigraphy of early vertebrates on Gotland2014In: 4th Annual Meeting of IGCP 591, Estonia, 10 - 19 June 2014.: Abstracts and Field Guide / [ed] Heikki Bauert, Olle Hints, Tõnu Meidla & Peep Männik, Tartu: University of Tartu, 2014, 21-21 p.Conference paper (Other academic)
  • 41.
    Bremer, Oskar
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Blom, Henning
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Biostratigraphy of Silurian vertebrates from Gotland, Sweden, revisited: understanding spatial and temporal distributions2015In: Abstract volume of the 13th International symposium on Early and Lower Vertebrates / [ed] Kate Trinajstic, Zerina Johanson, Martha Richter and Catherine Boisvert, 2015Conference paper (Other academic)
  • 42.
    Bremer, Oskar
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    Kear, Benjamin P.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
    CT-scan of Parasaurolophus tubicen from the Sternberg Collection (Uppsala University)2011In: The 2nd Wiman Meeting. Carl Wiman's Legacy: 100 Years of Swedish Palaeontology / [ed] Benjamin P. Kear and Michael Streng, 2011, 4- p.Conference paper (Other academic)
    Abstract [en]

    In 1922, Carl Wiman, head of the then Palaeontological Institute at Uppsala University, received a series of crates containing dinosaur remains from the Upper Cretaceous (upper Campanian–Maastrichtian) Kirtland Formation of New Mexico, U.S.A. The specimens had been collected in 1921 by the famous American fossil hunter, Charles H. Sternberg, during a commissioned 5 month field expedition to the in the San Juan Basin. Arguably, one of the most significant specimens recovered was the partial skull of the spectacular crested hadrosaur Parasaurolophus tubicen. The holotype (PMU 24925) comprises the massive crest and neurocranium, together with parts of the pareital, frontal, prefrontals, postorbitals, squamosals and exoccipitals. The right quadrate is also preserved in articulation with the quadratojugal and pterygoid; the right jugal, maxilla, pterygoid, ectopterygoid and the anterior section of the lacrimal make up the facial region of the skull. Wiman was the first to propose that the crest of Parasaurolophus functioned as a vocalization structure. This study aims to investigate the functional morphology of the crest in this hadrosaur, in conjunction with endocranial anatomy, using CT-scanning and 3D modelling of the intracranial chambers. Comparisons with other specimens of Parasaurolophus will permit reconstruction of sensory capabilities in this 'classic' dinosaur taxon.

  • 43.
    Bremer, Oskar
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Niedzwiedzki, Grzegorz
    Blom, Henning
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Dec, Marek
    Kozłowski, Wojciech
    Vertebrate microremains from the upper Silurian Winnica Formation of the Holy Cross Mountains, Poland2017In: Geological Magazine, ISSN 0016-7568, E-ISSN 1469-5081, 1-19 p., doi:10.1017/S0016756817000681Article in journal (Other academic)
  • 44.
    Breuillard, H.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
    Yordanova, Emiliya
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
    Vaivads, Andris
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
    Alexandrova, O.
    LESIA Observ Paris Meudon, Meudon, France..
    The Effects Of Kinetic Instabilities On Small-Scale Turbulence In Earth's Magnetosheath2016In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 829, no 1, 54Article in journal (Refereed)
    Abstract [en]

    The Earth's magnetosheath is the region delimited by the bow shock and the magnetopause. It is characterized by highly turbulent fluctuations covering all scales from MHD down to kinetic scales. Turbulence is thought to play a fundamental role in key processes such as energy transport and dissipation in plasma. In addition to turbulence, different plasma instabilities are generated in the magnetosheath because of the large anisotropies in plasma temperature introduced by its boundaries. In this study we use high-quality magnetic field measurements from Cluster spacecraft to investigate the effects of such instabilities on the small-scale turbulence (from ion down to electron scales). We show that the steepening of the power spectrum of magnetic field fluctuations in the magnetosheath occurs at the largest characteristic ion scale. However, the spectrum can be modified by the presence of waves/structures at ion scales, shifting the onset of the small-scale turbulent cascade toward the smallest ion scale. This cascade is therefore highly dependent on the presence of kinetic instabilities, waves, and local plasma parameters. Here we show that in the absence of strong waves the small-scale turbulence is quasi-isotropic and has a spectral index alpha approximate to 2.8. When transverse or compressive waves are present, we observe an anisotropy in the magnetic field components and a decrease in the absolute value of alpha. Slab/2D turbulence also develops in the presence of transverse/compressive waves, resulting in gyrotropy/non-gyrotropy of small-scale fluctuations. The presence of both types of waves reduces the anisotropy in the amplitude of fluctuations in the small-scale range.

  • 45.
    Brisvåg, Julia
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Utveckling av beslutsstöd för hållbara val av dagvattenhantering2017Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The ongoing urbanization contributes to decreaseinfiltration and evaporation of water, compared to natural environments. This affect the natural water cycle, leading to an increased surface runoff of rain and melt water, also known as stormwater. Stormwater has by tradition been managed by diverting it to wastewater treatment plants or to the closest receiving waters. Today, it isconsidered to be more sustainable and modern managing the stormwater locally, close to the source by imitating a natural water cycle. The problem of realizing this modern management is not caused by inadequate modern techniques, but a communicative problem between the concerned parties. To promote a long term and sustainable management, a commonvision is required. This demands new forums for discussion. All concerned partiesshould pursue a common goal to minimize the risk of the system being chosen based on economy and previous experience. Focus should be pointed to solutions that are sustainable in the specific area. This should be elucidated in the procurement stage to create good conditions for implementation.

    The objective with this thesis wasto elaborate a decision supportmethod, facilitating communication between the concerned parties at the procurement stage of stormwater management. The decision support will promotea long term and sustainable solution, and consider the specific area with regard to social conditions and nature. By using multiple-criteria decision analysis, systems of stormwater management will be compared based on problems and advantages of stormwater in an urban environment and an optimal solution can be identified. The decision support has been designedto easily retrieve basic conditions for the comparison early in the procurement stage, which then can be analyzed in view of opinions from the different concerned parties. The design is based on established methods concerning delay demands, pollution load and dimensioning of systems of stormwater management. To test the relevance of the decision support, a case study of an area currently under procurement for exploitation in Uppsala was performed.

    The developed decision support consists of four sections; “Multiple-criteria decision analysis”, “Alternatives of systems”, “Delay demands” and “Pollution load”. “Multiple-criteria decision analysis” includes analytical comparison where different systems of stormwater management are evaluated and weighted according to 21 criteria related to sustainable stormwater management. “Alternatives of systems”, suggests stormwater techniques which can form a system ofstormwater management. “Delay demands” calculates how much water that should be delayed after exploitation and “Pollution load” calculates the purification effect on polluted stormwater depending on choice of systems. The case study reveals that the support can contribute to better communication between concerned parties within procurement and that the best suited system of stormwater management for the case study area are systems that manage stormwater locally near the source of water.

  • 46.
    Bryhn, Andreas C
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Sustainable Phosphorus Loadings from Effective and Cost-Effective Phosphorus Management Around the Baltic Sea2009In: PLoS ONE, ISSN 1932-6203, Vol. 4, no 5, e5417- p.Article in journal (Refereed)
    Abstract [en]

    Nutrient over-enrichment of the Baltic Sea, accompanied by intensified algal blooms and decreasing water clarity, has aroused widespread concern in the surrounding countries during the last four decades. This work has used a well-tested dynamic mass-balance model to investigate which decrease in total phosphorus loading would be required to meet the environmental goal to restore the trophic state in the Baltic Sea to pre-1960s levels. Furthermore, the extent to which various abatement options may decrease the phosphorus loading in a cost-effective manner has been studied. Upgrading urban sewage treatment in the catchment could, alone or in combination with banning phosphates in detergents, be sufficient to meet the set environmental goal, at an estimated annual basin-wide cost of 0.21–0.43 billion euro. Such a plan would potentially decrease the total phosphorus loading to the Baltic Sea with 6,650–10,200 tonnes per year.

  • 47.
    Bryhn, Andreas C.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Håkanson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Coastal eutrophication: whether N and/or P should be abated depends on the dynamic mass balance2009In: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, Vol. 106, no 1, E3-E3 p.Article in journal (Refereed)
  • 48.
    Bryhn, Andreas C.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Air and Water Science.
    Håkanson, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Air and Water Science.
    Eklund, Jenny
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Variabilities and uncertainties in key coastal water variables as a basis for understanding changes and obtaining predictice power in modelling2008In: Vatten, ISSN 0042-2886, Vol. 64, 259-272 p.Article in journal (Refereed)
    Abstract [en]

    The focus of this work is on general patterns in uncertainty as well as temporal and spatial variability in keywater variables in coastal science and management. These patterns are essential since they regulate how manysamples must be taken to get reliable mean or median values characterising coastal water quality and whichvariables are most suitable for monitoring and predictive modelling. We present results concerning coefficientsof variation, correlations, regressions, variations in data from different time periods, and confidence intervalsfor empirical mean values. We use data from Ringkøbing Fjord (Denmark, N. Europe), Chesapeake Bay(Eastern U.S.) and other coastal marine sites to illustrate the basic principles related to patterns in variability.We have shown that total and particulate N and P generally have much lower coefficients of variability (CV)than dissolved inorganic nutrient fractions. The latter are, hence, of limited use in predictive models for coastalmanagement. Total nitrogen (N) and phosphorus (P) were, on the other hand, found to be useful predictors oftwo standard bioindicators, the Secchi depth (a measure of water clarity) and chlorophyll-a concentrations(a measure of phytoplankton biomass or production)

  • 49.
    Bryhn, Andreas C.
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Air and Water Science. LUVAL.
    Håkanson, Lars
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Air and Water Science. LUVAL.
    Eklund, Jenny M.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Air and Water Science. LUVAL.
    Variabilities and uncertainties in management-related coastal water variables.: Deliverable D2.3.3.2007Report (Other scientific)
  • 50.
    Bryhn, Andreas
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. LUVAL.
    Håkanson, Lars
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. LUVAL.
    Bekämpa Östersjöns övergödning med reningsverk i Polen.2008Other (Other (popular scientific, debate etc.))
1234567 1 - 50 of 427
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf