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  • 1. Aanes, R
    et al.
    Sæther, B-E
    Smith, F M
    Cooper, E J
    Wookey, Philip
    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. Miljö- och landskapsdynamik.
    The Arctic Oscillation predicts effects of climate change in the arctic ecosystem2002In: Ecology Letters, Vol. 4, p. 445-453Article in journal (Refereed)
  • 2.
    Aldahan, Ala
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Miljö- och landskapsdynamik.
    Alfimov, Vasily
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Kekli, A
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. jonfysik.
    Cato, Ingemar
    Anthropogenic I-129 in the Baltic Sea2005In: 10th International conference on accelerator mass spectrometry, Berkeley, 2005, p. 33-Conference paper (Refereed)
  • 3.
    Aldahan, Ala
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Alfimov, Vasily
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. jonfysik.
    The 129I anthropogenic budget:sources and sinks2005In: Geochimica et cosmochimica Acta, Vol. 69, no 10, p. A716-Article in journal (Refereed)
  • 4.
    Alfimov, V
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Technology, Department of Engineering Sciences, Ion Physics. Jonfysik.
    Aldahan, Ala
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Technology, Department of Engineering Sciences, Ion Physics. ELD.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Technology, Department of Engineering Sciences, Ion Physics. Jonfysik.
    A transect of 129I in seawater from the North Pole to the Norwegian Sea2003In: Geophysical Research Abstracts, 5,, 2003, 2003, p. 05989-Conference paper (Other (popular scientific, debate etc.))
  • 5.
    Alfimov, V
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Magnitude of 129I variability in precipitation over Europe2004In: Goldschmidt Conferences 2004, 6-11 June, Copenhagen. Geochimica et Cosmochimica Acta Volume 68, Issue 11, Supplement 1, 2004, p. A493-Conference paper (Other (popular science, discussion, etc.))
  • 6.
    Alfimov, Vasely
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Aldahan, Ala
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Anthropogenic iodine-129 in the Arctic Ocean and Nordic Seas: Numerical modeling and prognoses2005In: Marine Pollution Bulletin, Vol. doi 10.1016Article in journal (Refereed)
  • 7.
    Alfimov, Vasilli
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Aldahan, Ala
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. jonfysik.
    Iodine-129 in seawater along a transect from the2003In: 9th International Conference on Accelerator Mass, 2003, p. 195-Conference paper (Refereed)
  • 8.
    Alfimov, Vasily
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Materials Science. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Department of Engineering Sciences, Ion Physics. Jonfysik.
    Aldahan, Ala
    Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Department of Engineering Sciences, Ion Physics. ELD.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Materials Science. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Department of Engineering Sciences, Ion Physics. Jonfysik.
    Windsor, Peter
    Anthropogenic iodine-129 in seawater along a transect from the Norwegian coastal current to the North Pole2004In: Marine Pollution Bulletin 49, 1097-1104, 2004, Vol. 49, p. 1097-1104Article in journal (Refereed)
  • 9.
    Alfimov, Vasily
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. jonfysik.
    Aldahan, Ala
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Measurement of 36Cl with a gas-filled magnet at the Uppsala Tandem Laboratory2005In: 10th International conference on accelerator mass spectrometry, Berkeley, 2005, p. 88-Conference paper (Refereed)
  • 10.
    Alfimov, Vassily
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Aldahan, Ala Adin
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Miljö och Landskapsdynamik.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Tracing water masses with 129I inwestern Nordic Seas in early spring 20022004In: Geophysical Research Letters, Vol. 31Article in journal (Refereed)
  • 11.
    Alfimov, Vassily
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Aldahan, Ala Adin
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Miljö och landskapsdynamik.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Kekli, Abdulaziz
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Meili, M
    Concentration of 129I along a transect from the North Atlantic to the Baltic Sea2004In: NIM, Vol. B, p. 446-450Article in journal (Refereed)
  • 12. 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, p. 224-Conference paper (Refereed)
  • 13.
    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, p. 105-Conference paper (Refereed)
  • 14.
    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)
  • 15.
    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, Environment and Landscape Dynamics. Miljö & Landskapsdynamik.
    Searle, Mike
    3D Multisensor Study of the Geology and Geomorphology of Mount Quomolangma, Southern Tibetan Himalaya2005Conference paper (Other (popular scientific, debate etc.))
    Abstract [en]

    Based on a number of Digital Terrain Models (DTM) different aspects of the geology of Mount Everest will be visualized. We use terrain models based on ASTER satellite images, the “ETH” DTM (Prof. Dr. Armin Gruen, Institute of Geodesy and Photogrammetry, ETH Zurich), as well as SRTM-data and own digitized contours taken from maps (1 : 10 000) kindly provided by Dr. Brad Washburn (Boston museum of Science) in our study to create a 3D view over the study area. Differences in the DTMs will be discussed together with the way in which they merged to form our data base.

    Ground truth of the geological information is given by the newly released geological map of the Everest region (Searle, 2003), and fieldwork carried out by both authors independently at different occasions. Satellite imagery used in this study was produced by the following space born high resolution sensors:

    Landsat MSS, TM, ETM+, MOMS, ASTER, and HYPERION

    Finally we draped geological maps and remote sensing imagery over the optimized DTM, which allowed an interactive evaluation and comparison of the different data sets. Results from supervised classifications of the imagery will be compared with different maps based on geological fieldwork. The interaction and dependence of geology and geomorphology of the Mt. Everest Massif will be discussed.

    Searle, M.P. 2003. Geological Map of the Mount Everest region, Nepal - South Tibet Himalaya. Scale 1:100,000. Dept. Earth sciences, Oxford University, UK.

  • 16.
    Beylich, Achim
    et al.
    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.
    Molau, Ulf
    Luthbom, Karin
    Ginz, Dorothea
    Rates of chemical and mechanical fluvial denudation in an arctic oceanic periglacial environment, Latnjavagge drainage basin, northernmost Swedish Lapland2005In: Arctic Antarctic and Alpine Research, Vol. 37, no 1, p. 75-87Article in journal (Refereed)
  • 17.
    Boelhouwers, Jan
    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.
    Active-layer climate, landforms and processes at Basen and Fossilrygen2005Report (Other (popular scientific, debate etc.))
  • 18. Cooper, Elisabeth
    et al.
    Wookey, Philip
    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. Miljö- och landskapsdynamik.
    Floral herbivory of Dryas Octopetala by Svalbard reindeer.2003In: Arctic, Antarctic and Alpine Research, Vol. 9, p. 759-772Article in journal (Refereed)
  • 19.
    Englund, Edvard
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Alfimov, Vasily
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Aldahan, Ala
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. jonfysik.
    A routine preparation method for AMS measurement of I-129 in solid materials2005In: 10th International conference on accelerator mass spectrometry, Berkeley, 2005, p. 75-Conference paper (Other (popular scientific, debate etc.))
  • 20. Gallagher, Donal
    et al.
    McGee, Eddi
    Mitchell, Peter
    Alfimov, Vasely
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Aldahan, Ala
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Retrospective Serach for evidence of the 1957 Windscale fire in NE Ireland using 129I and other long-lived nuclides2005In: Environmental Science and Technology, Vol. 39, p. 2927-2935Article in journal (Refereed)
  • 21. Gough, L
    et al.
    Wookey, Philip
    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. Miljö- och landskapsdynamik.
    Shaver, G R
    Responses of dry heath arctic tundra to long-term nutrient and light manipulation2002In: Arctic, Antarctic and Alpine Research, Vol. 34, p. 211-218Article in journal (Refereed)
  • 22. Grinsted, Aslak
    et al.
    Moore, John
    Pohjola, Veijo
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Martma, Tönu
    Isaksson, Elisabeth
    Svalbard summer melting, continentality, and sea ice extent from the Lomonosovfonna ice core2006In: Journal of Geophysical Research, Vol. 111, p. D07110-Article in journal (Refereed)
    Abstract [en]

    We develop a continentality proxy (1600–1930) based on amplitudes of the annual signal in oxygen isotopes in an ice core. We show via modeling that by using 5 and 15 year average amplitudes the effects of diffusion and varying layer thickness can be minimized, such that amplitudes then reflect real seasonal changes in δ18O under the influence of melt. A model of chemical fractionation in ice based on differing elution rates for pairs of ions is developed as a proxy for summer melt (1130–1990). The best pairs are sodium with magnesium and potassium with chloride. The continentality and melt proxies are validated against twentieth-century instrumental records and longer historical climate proxies. In addition to summer temperature, the melt proxy also appears to reflect sea ice extent, likely as a result of sodium chloride fractionation in the oceanic sea ice margin source area that is dependent on winter temperatures. We show that the climate history they depict is consistent with what we see from isotopic paleothermometry. Continentality was greatest during the Little Ice Age but decreased around 1870, 20–30 years before the rise in temperatures indicated by the δ18O profile. The degree of summer melt was significantly larger during the period 1130–1300 than in the 1990s.

  • 23.
    Gustavsson, Marcus
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Kolstrup, Else
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Seijmonsbergen, Arie, C.
    A new symbol- and GIS-based detailed geomorphological mapping system: renewal of a scientific discipline for understanding landscape development2006In: Geomorphology, ISSN 0169-555X, E-ISSN 1872-695X, Vol. 77, no 1-2, p. 90-111Article in journal (Refereed)
    Abstract [en]

    This paper presents a comprehensive and flexible new geomorphological combination legend that expands the possibilities of current geomorphological mapping concepts. The new legend is presented here at scale of 1:10,000 and it combines symbols for hydrography, morphometry/morphography, lithology and structure with colour variations for process/genesis and geologic age. The piece-by-piece legend forms a “geomorphological alphabet” that offers a high diversity of geomorphological information and a possibility for numerous combinations of information. This results in a scientific map that is rich in data and which is more informative than most previous maps but is based on a simple legend. The system is developed to also be used as a basis for applications in GIS. The symbol-based information in the geomorphological maps can be digitally stored as a powerful database with thematic layers and attribute tables. By combining and further developing aspects of different classical mapping systems and techniques into expanded data combinations, new possibilities of presentation and storage are developed and thus a strong scientific tool is provided for landscape configuration and the reconstruction of its development; in turn the combination paves the way for specific thematic applications. The new system is illustrated for two contrasting landscape types: the first is located on the border of Vorarlberg, western Austria, and Liechtenstein in a glacially influenced, high altitude alpine setting that is strongly modified by various degradation processes; the second area represents a formerly glaciated region in Dalarna, central Sweden near Mora, an area that is characterized by a variety of aeolian, fluvial, glaciofluvial and lacustrine depositional and erosional landforms and also reflects isostatic uplift. The new method functions well for both areas and results in detailed scientific outlines of both landscape types.

  • 24.
    Gustavsson, Marcus
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Seijmonsbergen, AC
    Kolstrup, Else
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Structure and contents of a new geomorphological GIS database linked to a geomorphological map - with an example from Liden, central Sweden2008In: Geomorphology, ISSN 0169-555X, E-ISSN 1872-695X, Vol. 95, no 3-4, p. 335-349Article in journal (Refereed)
    Abstract [en]

    This paper presents the structure and contents of a standardised geomorphological GIS database that stores comprehensive scientific geomorphological data and constitutes the basis for processing and extracting spatial thematic data. The geodatabase contains spatial information on morphography/morphometry, hydrography, lithology, genesis, processes and age. A unique characteristic of the GIS geodatabase is that it is constructed in parallel with a new comprehensive geomorphological mapping system designed with GIS applications in mind. This close coupling enables easy digitalisation of the information from the geomorphological map into the GIS database for use in both scientific and practical applications. The selected platform, in which the geomorphological vector, raster and tabular data are stored, is the ESRI Personal geodatabase. Additional data such as an image of the original geomorphological map, DEMs or aerial orthographic images are also included in the database. The structure of the geomorphological database presented in this paper is exemplified for a study site around Liden, central Sweden.

  • 25. Hall, Kevin
    et al.
    Arocena, Joselito
    Boelhouwers, Jan
    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.
    Zhu, Liping
    The influence of aspect on the biological weathering of granites: observations from the Kunlun Mountains, China2005In: Geomorphology, Vol. 67, p. 171-188Article in journal (Refereed)
  • 26. Hedfors, J
    et al.
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. miljö-och landskapsdynamik.
    Kulan, A
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics. Jonfysik.
    Clouds and 7Be:perusing connections between cosmic rays and climat2006In: Geophysical Research Letters, Vol. 111, p. D02208, doi:10.1029/2005JD005903-Article in journal (Refereed)
  • 27.
    Hedfors, Jim
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Pohjola, Veijo
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Ice flux of Plogbreen, a small ice stream in Dronning Maud Land, Antarctica2004In: Annals of Glaciology, ISSN 0260-3055, E-ISSN 1727-5644, Vol. 39, no 1, p. 409-416Article in journal (Refereed)
    Abstract [en]

    As part of a long-term mass-balance program run by SWEDARP since 1988, a detailed study on Plogbreen, Dronning Maud Land, Antarctica, was undertaken during the austral summer of 2003 to investigate the long-term mass balance. We compare ice outflux, out, through a cross-sectional gate with ice influx, in, from the upstream catchment area. The in is based on calculations of snow accumulation upstream of the gate using data available from published ice-core records. The out is based on Glen's flow law aided by thermodynamic modeling and force-budget calculations. Input data from the field consist of measurements of ice surface velocity and ice geometry. The ice surface velocity was measured using repeated differential global positioning system surveying of 40 stakes over a period of 25 days. The ice geometry was determined by 174 km of ground-penetrating radar profiling using ground-based 8 MHz dipole antennas. This study presents the collected velocity and geometry data as well as the calculated ice flux of Plogbreen. The results show a negatively balanced system within the uncertainty limits; out = 0.55 ± 0.05 km3 a−1 and in = 0.4 ± 0.1 km3 a−1. We speculate that the negative balance can be explained by recent eustatic increase reducing resistive stresses and inducing accelerated flow.

  • 28. Huss, M.
    et al.
    Bauder, A.
    Funk, M.
    Hock, Regine
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Determination of the seasonal mass balance of four Alpine glaciers since 18652008In: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 113, no F1, p. F01015-Article in journal (Refereed)
    Abstract [en]

    Alpine glaciers have suffered major losses of ice in the last century. We compute spatially distributed seasonal mass balances of four glaciers in the Swiss Alps (Grosser Aletschgletscher, Rhonegletscher, Griesgletscher and Silvrettagletscher) for the period 1865 to 2006. The mass balance model is forced by daily air temperature and precipitation data compiled from various long-term data series. The model is calibrated using ice volume changes derived from five to nine high-resolution digital elevation models, annual discharge data and a newly compiled data set of more than 4000 in situ measurements of mass balance covering different subperiods. The cumulative mass balances over the 142 year period vary between -35 and -97 m revealing a considerable mass loss. There is no significant trend in winter balances, whereas summer balances display important fluctuations. The rate of mass loss in the 1940s was higher than in the last decade. Our approach combines different types of field data with mass balance modeling to resolve decadal scale ice volume change observations to seasonal and spatially distributed mass balance series. The results contribute to a better understanding of the climatic forcing on Alpine glaciers in the last century.

  • 29. Håkansson, Lena
    et al.
    Alexanderson, H
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. miljö-och landskapsdynamik.
    Briner, J
    Hjort, Klas
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Materials Science. Materialvetenskap.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics. Jonfysik.
    Using cosmogenic isotopes to reconcile two contrasting hypotheses for ice extent in East Greenland during the last glaciation2006Conference paper (Refereed)
  • 30. Isaksson, Elisabeth
    et al.
    Divine, Dmitry
    Kohler, Jack
    Martma, Tonu
    Pohjola, Veijo
    miljö- och landskapsdynamik. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Motoyama, Hideaki
    Watanabe, Okitsugu
    Climate oscillations as recorded in Svalbard ice core δ 18O records between 1200-1997 AD2005In: Geografiska Annaler. Series A, Physical Geography, ISSN 0435-3676, E-ISSN 1468-0459, Vol. 87a, no 1, p. 203-214Article in journal (Refereed)
    Abstract [en]

    We apply two different time series analytical tools to omega18O records from two Svalbard ice cores. One ice core is from Lomonosovfonna at 1250 ma.s.l. and the other from Austfonna at 750 m a.s.l. These cores are estimated to cover at least the past 800 years and have been dated using a combination of known reference horizons and glacial modelling. Wavelet analysis reveals low frequency oscillations on the 60-120-year scale on the lower elevation site Austfonna while the higher altitude site on Lomonosovfonna does not reveal such variability throughout the record. The second method, Significant Zero Crossing of Derivates (SiZer) does not resolve the low-frequency periodicity seen in the wavelet analysis. The low-frequency variability resolved by the wavelet analysis is similar to what has been found in various climate records including instrumental temperatures and tree-rings, and has been proposed as the most important oscillation for the observed trends in Arctic air temperatures.

  • 31.
    Isaksson, Elisabeth
    et al.
    Norwegian Polar Institute,Tromsø, Norway.
    Kohler, Jack
    Norwegian Polar Institute,Tromsø, Norway.
    Pohjola, Veijo
    miljö och landskapsdynamik. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Moore, John
    Arctic Centre, University of Lapland, Rovaniemi, Finland.
    Igarashi, Makoto
    National Institute of Polar Research (NIPR), Tokyo, Japan.
    Karlöf, LArs
    Norwegian Polar Institute,Tromsø, Norway.
    Martma, Tönu
    Institute of Geology at Tallinn University of Technology, Estonia.
    Motoyama, Hideaki
    National Institute of Polar Research (NIPR), Tokyo, Japan.
    Vaikmäe, Rein
    Institute of Geology at Tallinn University of Technology, Estonia.
    van de Wal, Roderik S. W.
    Institute for Marine and Atmospheric Research Utrecht, Utrecht University, The Netherlands.
    Meijer, Harro
    Centre for Isotope Research, Groningen, The Netherlands;.
    Two ice core δ18O records from Svalbard illustrating climate and sea ice variability over the last 400 years2005In: The Holocene, Vol. 15, no 4, p. 501-509Article in journal (Refereed)
    Abstract [en]

    Ice cores from the relatively low-lying ice caps in Svalbard have not been widely exploited in climatic studies owing to uncertainties about the effect of meltwater percolation. However, results from two new Svalbard ice cores, at Lomonosovfonna and Austfonna, have shown that with careful site selection, high-resolution sampling and multiple chemical analyses it is possible to recover ice cores from which part of the annual signals are preserved, despite the considerable meltwater percolation. The new Svalbard ice cores are positioned in different parts of Svalbard and cover the past 800 years. In this paper we focus on the last 400 years. The 6180 signals from the cores are qualitatively similar over most of the twentieth century, suggesting that they record the same atmospheric signal. Prior to AD 1920, the Austfonna ice core exhibits more negative 6180 values than Lomonosovfonna, although there are intermittent decadal-scale periods throughout the record with similar values. We suggest that the differences reflect the effect of the inversion layer during the winter. The pattern in the 6180 records is similar to the Longyearbyen airtemperature record, but on an annual level the correlation is low. The Austfonna record correlates well with the temperature record from the more distant and southwesterly located Jan Mayen. A comparison of the ice-core and sea-ice records from this period suggests that sea-ice extent and Austfonna 6180 are related over the past 400 years. This may reflect the position of the storm tracks and their direct influence on the relatively low-altitude Austfonna. Lomonosovfonna may be less sensitive to such changes and primarily record free atmospheric changes instead of variations in sea-ice extent, the latter is probably a result of its higher elevation.

  • 32.
    Jordan, Gyözy
    et al.
    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. Miljö- och landskapsdynamik.
    Szucs, Andrea
    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. Miljö- och landskapsdynamik.
    Environmental mapping of geochemical systems2002In: Geo-environmental mapping: theory, methods and applications, Balkema, Lisse , 2002, p. 57-74Chapter in book (Refereed)
  • 33.
    Jordan, Gyözö
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Terrain Modelling with GIS for Tectonic Geomorphology: Numerical Methods and Applications2004Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Analysis of digital elevation models (DEMs) by means of geomorphometry provides means of recognising fractures and characterising the morphotectonics of an area in a quantitative way. The objective of the thesis is to develop numerical methods and a consistent GIS methodology for tectonic geomorphology and apply it to test sites. Based on the study of landforms related to faults, geomorphological characteristics are translated into mathematical and numerical algorithms. The methodology is based on general geomorphometry. In this study, the basic geometric attributes (elevation, slope, aspect and curvatures) are complemented with the automatic extraction of ridge and valley lines and surface specific points. Evan’s univariate and bivariate methodology of general geomorphometry is extended with texture (spatial) analysis methods such as trend, autocorrelation, spectral, wavelet and network analysis. Digital terrain modelling is carried out by means of (1) general geomorphometry, (2) digital drainage network analysis, (3) digital image processing, (4) lineament extraction and analysis, (5) spatial and statistical analysis and (6) DEM specific digital methods such as shaded relief models, digital cross-sections and 3D surface modelling. Geological data of various sources and scales are integrated in a GIS database. Interpretation of multi-source information confirmed the findings of digital morphotectonic investigation. A simple shear model with principal displacement zone in the NE-SW direction can explain most of the morphotectonic features associated with structures identified by geological and digital morphotectonic investigations in the Kali Basin. Comparison of the results of the DTA with the known geology from NW Greece indicated that the major faults correspond to clear lineaments. Thus, DTA of an area in the proposed way forms a useful tool to identify major and minor structures covering large areas. In this thesis, numerical methods for drainage network extraction and aspect analysis have been developed and applied to tectonic geomorphology.

  • 34.
    Jordan, Gyözö
    et al.
    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. Miljö- och landskapsdynamik.
    Schott, Bertram
    Application of wavelet analysis to the study of spatial pattern of morphotectonic lineaments in digital terrain models. A case study2005In: Remote Sensing of Environment, Vol. 94, no 1, p. 31-38Article in journal (Refereed)
    Abstract [en]

    Tectonic faults are often associated with characteristic geomorphological features such as linear valleys, ridgelines and slope breaks that can be identified as lineaments in remotely sensed images or digital terrain models. Lineaments of tectonic origin are often characterised by periodicity and characteristic spatial pattern. Unlike traditional methods of autocorrelation, variogram, lineament density and Fourier analysis, wavelet analysis is capable of capturing and describing both periodicity and spatial pattern of lineaments. In this paper, a case study is shown for the application of wavelet analysis to morphotectonic lineament investigation. Results of wavelet analysis are compared to traditional methods. Although this study involves DEM-derived morphological lineaments, the presented wavelet analysis can be also used for lineaments derived from remotely sensed images. These results hold for this case study and provide a good assessment of the relative abilities of wavelet analysis, but it remains to be seen how effective it is for other data sources, areas and geological terrain.

  • 35.
    Kekli, Aziz
    et al.
    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. Technology, Department of Engineering Sciences, Ion Physics.
    Aldahan, Ala
    Possnert, Göran
    Department of Materials Science. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Technology, Department of Engineering Sciences, Ion Physics.
    Riverine 129I in the Baltic region2004In: Goldschmidt Conferences 2004, 6-11 June , Copenhagen. Geochimica et Cosmochimica Acta Volume 68, Issue 11, Supplement 1,, 2004, p. A 492-Conference paper (Other (popular scientific, debate etc.))
  • 36. Kekonen, Teija
    et al.
    Moore, John
    Perämäki, Pekka
    Mulvaney, Rob
    Pohjola, Veijo
    miljö- och landskapsdynamik. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Isaksson, Elisabeth
    van de Wal, Roderik S. W.
    800 year long ion record from the Lomonosovfonna (Svalbard) ice core2005In: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 110, no D7Article in journal (Refereed)
    Abstract [en]

    We present a high-resolution record of water-soluble ion chemistry from a 121 m ice core spanning about 800 years. The core is well dated to 2/3 depth using cycle counting and reference horizons and a simple but close fitting model for the lower 1/3 of the core. This core suffers from modest seasonal melt, and so we present concentration data in decadal running means to minimize percolation effects. Sea-salt ions (Na+, Cl, Mg2+, and K+) account for more than 70% of all ions. In general, sea-salt ion concentrations are rather variable and have no clear association with climatic variations. Sulfate, with 74% being from non-sea-salt sources, has higher concentrations than seen on Vestfonna ice cap but lower than in Ny-Ålesund aerosols, suggesting central Spitsbergen receives more marine (westerly) air masses than Ny-Ålesund but more sulfate enriched (easterly) air masses than Nordaustlandet. Clear anthropogenic impacts are found for sulfate, nitrate, and ammonium (and probably excess chloride) after the mid twentieth century, with sulfate showing a significant rise by the end of the nineteenth century. Sulfate and methanesulfonate concentrations correlate well during the twentieth century, and it is clear that most of the preindustrial sulfate is of biogenic origin. Terrestrial component (Ca2+) has the highest concentrations in the coldest part of the Little Ice Age, suggesting more windy conditions, transporting local terrestrial dust to the ice cap. All ion concentrations decrease at the end of the twentieth century, which reflects loss of ions by runoff, with non-sea-salt magnesium being particularly sensitive to melting.

  • 37.
    Kolstrup, Else
    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. Naturgeografi.
    A pollen preparation procedure with soap wash-sieving for fine-grained unconsolidated sediments2005In: Kvinner i Arkeologi i Norge, Vol. 25, p. 50-59Article in journal (Refereed)
  • 38.
    Kolstrup, Else
    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.
    Lotte Selsing: A multidisciplinary researcher2005Other (Other (popular scientific, debate etc.))
  • 39.
    Kolstrup, Else
    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.
    Periglacial Geomorphology2005In: The Physical Geography of Western Europe, Oxford University Press, Oxford , 2005, p. 75-92Chapter in book (Refereed)
  • 40.
    Kulan A., Vintersved I
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Aldahan, Ala
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Solar cycle activity and atmospheric dynamics revealed by Be-72003In: Geophysical Research Abstr., 2003, p. 11267-Conference paper (Refereed)
  • 41.
    Kulan, Abdulhadi
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Seasonal Be-7 and Cs-137 activities in surface air before and after the Chernobyl event2006In: Journal of Environmental Radioactivity, ISSN 0265-931X, E-ISSN 1879-1700, Vol. 90, no 2, p. 140-150Article in journal (Refereed)
    Abstract [en]

    Seasonal fluctuations of cosmogenic Be-7 (T-1/2=53.4 days) and anthropogenic Cs-137 (T-1/2 = 30 years) activities in surface air (aerosols) have been extracted from a long data record (1972-2000) at high latitude (56 degrees N-68 degrees N, Sweden). Normalization to weekly average values was used to control long-term trends so that cyclical trends could be investigated. Enhanced Be-7 activity was observed in spring and summer seasons and likely relates to the seasonal thinning of the tropopause. Variations in the Cs-137 activity record seem to reflect how the isotope was injected in the atmosphere (stratospheric from bomb tests and tropospheric from the Chernobyl accident) and subsequent transport mechanisms. Accordingly, until 1986, the surface air Cs-137 activity was strongly related to nuclear weapons test fallout and exhibits temporal fluctuations resembling the Be-7. Conversely, since 1986 the Chernobyl-produced Cs-137 dominates the long-term record that shows annual cycles that are strongly controlled by atmospheric boundary layer conditions. Additionally, short-term data within the post-Chernobyl period suggest subtle intrusion of air masses rich in (CS)-C-137 that may occur throughout the year, and differences resulting from spatial occurrence at these latitudes. This is an important observation that may have to do with year-to-year variation and calls for caution when interpreting short-term data records.

  • 42.
    Lorenz, Henning
    et al.
    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. geofysik.
    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.
    Gee, David
    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. geofysik.
    A multiple sensor approach for bedrock geological mapping in the high Arctic2004In: The 26th Nordic Geological Winter Meeting: Abstract volume, 2004, p. 107-Conference paper (Refereed)
  • 43. Moore, John
    et al.
    Grinsted, Aslak
    Kekonen, Teija
    Pohjola, Veijo
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Separation of melting and environmental signals in an ice core with seasonal melt2005In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 32, p. L10501-Article in journal (Refereed)
    Abstract [en]

    We examine the impact of melt water percolation on the soluble ion chemical record from the Lomonosovfonna ice core. Principle component analysis shows that melting produces only simple changes between bubbly and clear ice facies, due to elution of ions. The data can be naturally split into four groups: pre-industrial, immediately before, and after the end of the Little Ice Age, and anthropogenic impact eras. The 2nd, 3rd and 4th principle components for these periods all differ significantly, reflecting complex changes in environmental conditions. Thus the core preserves a rich record of environmental history, and simple one of melting. We construct a model of percolation effects to reconstruct “pristine” ice chemical composition, finding that even with melt percentages as high as 80%, there is little disturbance to the chemical stratigraphy. This suggests that ionic records from Arctic ice cap cores are nearly as reliable as those from Greenland or Antarctica.

  • 44.
    Musinguzi, Moses
    et al.
    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. Miljö & Landskapsdynamik.
    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. Miljö & Landskapsdynamik.
    Tickodri-Togboa, Sandy S.
    OPPORTUNITIES AND CHALLENGES FOR SDI DEVELOPMENT IN DEVELOPING COUNTRIES -: A CASE STUDY OF UGANDA2004In: Proceedings of the 12th International Conference on Geoinformatics: Geospatial Information Research: Bridging the Pacific and Atlantic, 2004Conference paper (Refereed)
    Abstract [en]

    Developments in Spatial data collection and use have led to what are currently known as Spatial Data Infrastructures (SDIs). SDIs are technologies, policies, standards, and human resources to acquire, process, store, distribute, and improve utilisation of geo-spatial information. SDIs are generally believed to play a big role in optimising the utilisation of spatial data, which in turn leads to the development of a nation. SDIs are currently benefiting developed countries, which are characterised by high levels of IT, adequate financial resources and huge quantities of spatial data. However, SDI concepts are now being disseminated into developing countries whose levels of IT do not match those of the developed countries; where most mapping and GIS programs are funded through foreign aid and huge quantities of spatial data are still kept on paper maps. There is still uncertainty as to whether developing countries are ready to utilise the benefits of SDI. Like many developing countries, Uganda is in the processes of developing a national spatial data infrastructure. Initial studies for developing a National Spatial Data Infrastructure and a National Land Information System have been carried out. Data was collected from different institutions, compiled in a CRUD Matrix and analysed using a methodology of assessing individual SDI components. The experience from these studies gives us an insight into what opportunities and challenges are ahead of developing countries trying to develop SDI. Whereas most of the challenges are similar in developed and developing countries,

    the unique challenges in developing countries are those sociated with underdevelopment and multiple donor aid. These challenges require that the components of SDI in developing countries take a slightly different shape but should serve the general purpose

    of establishing SDI.

  • 45. Nath, Nagender
    et al.
    Aldahan, Ala
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. miljö-och landskapsdynamik.
    Gupta, S
    Borole, V
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics. Jonfysik.
    Tectonic control and the orbital forcing on the 3 million year sedimentary record from the Central Indian Basi2006Conference paper (Other (popular science, discussion, etc.))
  • 46. Nath, Nagender
    et al.
    Aldahan, Ala
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Technology, Department of Engineering Sciences, Ion Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. jonfysik.
    10Be variation in surficial sediment of the Central Indian Ocean2005In: 10th International conference on accelerator mass spectrometry, Berkeley, 2005, p. 32-Conference paper (Refereed)
  • 47. Nygaard, Niels
    et al.
    Kolstrup, Else
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics.
    Detailed geomorphological mapping: A potential basis for sediment flux assessments2008In: Zeitschrift für Geomorphologie, ISSN 0372-8854, Vol. 52, no Suppl. 1, p. 199-210Article in journal (Refereed)
    Abstract [en]

    A detailed geomorphologic map of the Vattholma area, Uppland, Sweden, uses a newly developed legend that allows visual presentation of much descriptive information on hydrography, morphometry and morphography, lithological composition as well as genesis of the landforms. The area consists of an old peneplane with a rift valley and has undergone several glaciations. Following the last glaciation, glacio-isostatic rebound transformed the area from sea bottom to dry land, and today the major impression is one of glacially modified higher areas and lower lying marine/lacustrine parts. The geomorphological map provides information on the extension and relative distribution of lithologies and demonstrates how the landscape appears today and outlines the processes, which have created the landforms through time. In combination with regolith depth data the map gives a good overview of the area. It is suggested that this type of map can provide important background information for the choice of sampling and monitoring sites and for modelling purposes of both physical and chemical changes of the landscape. The system also works in cold climate areas in agreement with the focus of the sediflux program.

  • 48.
    Persson, Susanne
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. jonfysik.
    Alfimov, Vasily
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Jonfysik.
    Aldahan, Ala
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. ELD.
    Possnert, Göran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Ion Physics. Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. jonfysik.
    129I variability in precipitation over Europe2005In: 10th International conference on accelerator mass spectrometry, Berkeley, 2005, p. 65-Conference paper (Refereed)
  • 49.
    Pohjola, Veijo A
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Hedfors, Jim
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. Miljö- och landskapsdynamik.
    Holmlund, Per
    Investigating the potential to determine the upstream accumulation rate, using mass flux calculations along a cross-section on a small tributary glacier in Heimefrontfjella, Dronning Maud Land, Antarctica2004In: Annals of Glaciology, ISSN 0260-3055, E-ISSN 1727-5644, Vol. 39, no 1, p. 175-180Article in journal (Refereed)
    Abstract [en]

    How well can we estimate the incoming ice flux by calculating the ice flux through a well-defined cross-section? We test this by comparing calculated ice flux out from the small glacier Bonnevie-Svendsenbreen with the measured accumulation rate integrated over the well-defined catchment area in the Sivorgfjella plateau, Dronning Maud Land, Antarctica (74°45′S, 11°10′W). The ice flux is calculated using ice-dynamical properties from an ice temperature model and the distribution of forces calculated using a force-budget model. The input we use includes velocity data of the glacier surface, combined with ice-thickness measurements. The result is an accumulation rate on the Sivorgfjella plateau of 0.50 ± 0.05 m w.e.a−1. We find that this is similar to the accumulation rate recorded by ground-penetrating radar work in the area. We therefore find the balance-flow method, in combination with the force-budget technique and ice temperature modeling, to be a useful tool for studies of mass fluxes in a catchment area. The most important source of uncertainty in these calculations is the quality and the spatial distribution of the ice surface velocity data. The high accumulation rate shows the effect of orographic enhancement on accumulation in montane areas in Antarctica.

  • 50.
    Pohjola, Veijo
    et al.
    Miljö- och landskapsdynamik. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Environment and Landscape Dynamics. Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Cole-Dai, Jiang
    Rosqvist, Gunhild
    Stroeven, Arjen
    Thompson, Lonnie
    Potential to recover paleoclimatic data in temperate ice cores: an example from the small ice cap Riukojietna, Northern Scandinavia2005In: Geografiska Annaler. Series A, Physical Geography, ISSN 0435-3676, E-ISSN 1468-0459, Vol. 87, no 1, p. 259-270Article in journal (Refereed)
    Abstract [en]

    We have studied a 33.7 m deep ice core from a small polythermal Scandinavian ice cap to determine whether it is possible to recover pre-20th century climatic information from the glacier. Ice structural studies show a significant change from clear ice above 11 m depth (superimposed ice indicating refreezing) to bubbly ice below 11 m depth, indicating this is the transition between Little Ice Age (LIA) and 20th century ice. Calculations with a Nye-age model, along with a mass balance reconstruction, show that this structural boundary likely formed in the last part of the LIA, which in this region ended about 1910. The ice below this boundary was sampled and analyzed for stable isotopic composition and ionic content, which both show significant variations with depth. The stable isotope record likely contains cycles of annual duration during the LIA. The chemistry in the ice core indicates that the information is useful, and can be used to interpret climatic and environmental variables during the LIA. A comparison of Riukojietna ion chemistry and oxygen isotope records to similar records from other glaciers in this region reveals a clear continental – maritime gradient. Changes in this gradient with time may be possible to resolve using such ice core records. Results from this study demonstrate that ice cores from glaciers in this climatic environment can be useful in revealing environmental conditions from climatically colder periods and yield pre-industrial benchmark values for chemical loading and oxygen isotopes, but that hiatuses complicate the depth-age relationship.

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