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Moras, S., Zellmer, U. R., Hiltunen, E., Grasset, C. & Sobek, S. (2024). Predicting Methane Formation Rates of Freshwater Sediments in Different Biogeographic Regions. Journal of Geophysical Research - Biogeosciences, 129(1), Article ID e2023JG007463.
Öppna denna publikation i ny flik eller fönster >>Predicting Methane Formation Rates of Freshwater Sediments in Different Biogeographic Regions
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2024 (Engelska)Ingår i: Journal of Geophysical Research - Biogeosciences, ISSN 2169-8953, E-ISSN 2169-8961, Vol. 129, nr 1, artikel-id e2023JG007463Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Freshwater lakes and reservoirs cover a small fraction of the Earth, however their emission of the greenhouse gas methane (CH4) from the sediment to the atmosphere is disproportionately high. Currently, there is still a limited understanding of the links between sediment characteristics and CH4 formation. Earlier studies have indicated that sediment age and nitrogen content are related to sediment CH4 formation rates, but it is uncertain such relationships are valid across gradients of sediment characteristics. We therefore measured potential CH4 formation rates in multiple layers of sediment sampled from nine lakes situated in the temperate, boreal and alpine biogeographic regions of Sweden, thus differing in productivity, catchment and climate properties. Potential CH4 formation varied over 3 orders of magnitude, and was broadly related to the quantity and reactivity of organic matter, and generally decreased with sediment depth. Sediment age and total nitrogen content were found to be the key controlling factors of potential CH4 formation rates, together explaining 62% of its variability. Moreover, the model developed from the Swedish lake sediment data was able to successfully predict the potential CH4 formation rates in reservoirs situated in different biogeographic regions of Brazil (R2 = 0.62). Therefore, potential CH4 formation rates in sediments of highly contrasting lakes and reservoirs, from Amazonia to alpine tundra, could be accurately predicted using one common model (RMSE = 1.6 in ln-units). Our model provides a valuable tool to improve estimates of CH4 emission from lakes and reservoirs, and illustrates the fundamental regulation of microbial CH4 formation by organic matter characteristics.

Abstract [en]

Lakes and reservoirs are important emitters of methane, a strong greenhouse gas, to the atmosphere. Methane is produced in absence of oxygen by specific microbes that degrade the organic matter in the sediment. Currently, it is still uncertain which specific sediment properties control the production of methane, and if such properties are the same across lakes and reservoirs located in different ecosystem. To test this, we collected sediment cores from several lakes across different ecosystems in Sweden, and we measured potential methane formation rates. Methane formation rates varied greatly among lakes and was related to the quality and quantity of organic matter in the sediment. From this experiment, we calculated an empirical model that can predict methane formation rates as a function of sediment age and nitrogen content. Moreover, we found that our model could well predict potential methane formation rates in tropical reservoirs. In conclusion, sediment age and nitrogen content are universal controlling factors of methane formation rates across lakes and reservoirs in different ecosystems, from tropics to arctic tundra. Our findings provide a valuable tool to improve estimates of methane emission from lakes and reservoirs and illustrates how sediment characteristics play a crucial role in regulating methane formation rates.

Ort, förlag, år, upplaga, sidor
American Geophysical Union (AGU), 2024
Nyckelord
carbon cycle, methane, lakes, sediment age, nitrogen
Nationell ämneskategori
Miljövetenskap Ekologi
Identifikatorer
urn:nbn:se:uu:diva-522266 (URN)10.1029/2023JG007463 (DOI)001146869400001 ()
Forskningsfinansiär
Vetenskapsrådet, 2017-04405Olsson-Borghs stiftelse
Tillgänglig från: 2024-02-05 Skapad: 2024-02-05 Senast uppdaterad: 2024-04-05Bibliografiskt granskad
Paranaiba, J. R., Aben, R., Barros, N., Quadra, G., Linkhorst, A., Amado, A. M., . . . Kosten, S. (2022). Cross-continental importance of CH4 emissions from dry inland-waters. Science of the Total Environment, 814, Article ID 151925.
Öppna denna publikation i ny flik eller fönster >>Cross-continental importance of CH4 emissions from dry inland-waters
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2022 (Engelska)Ingår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 814, artikel-id 151925Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Despite substantial advances in quantifying greenhouse gas (GHG) emissions from dry inland waters, existing estimates mainly consist of carbon dioxide (CO2) emissions. However, methane (CH4) may also be relevant due to its higher Global Warming Potential (GWP). We report CH4 emissions from dry inland water sediments to i) provide a cross-continental estimate of such emissions for different types of aquatic systems (i.e., lakes, ponds, reservoirs, and streams) and climate zones (i.e., tropical, continental, and temperate); and ii) determine the environmental factors that control these emissions. CH4 emissions from dry inland waters were consistently higher than emissions observed in adjacent uphill soils, across climate zones and in all aquatic systems except for streams. However, the CH4 contribution (normalized to CO2 equivalents; CO2-eq) to the total GHG emissions of dry inland waters was similar for all types of aquatic systems and varied from 10 to 21%. Although we discuss multiple controlling factors, dry inland water CH4 emissions were most strongly related to sediment organic matter content and moisture. Summing CO2 and CH4 emissions revealed a cross-continental average emission of 9.6 +/- 17.4 g CO2-eqm(-2) d(-1) from dry inland waters. We argue that increasing droughts likely expand the worldwide surface area of atmosphere-exposed aquatic sediments, thereby increasing global dry inland water CH4 emissions. Hence, CH4 cannot be ignored if we want to fully understand the carbon (C) cycle of dry sediments.

Ort, förlag, år, upplaga, sidor
Elsevier, 2022
Nyckelord
Methane, Dry sediments, Aquatic ecosystems, Greenhouse gases
Nationell ämneskategori
Miljövetenskap
Identifikatorer
urn:nbn:se:uu:diva-481398 (URN)10.1016/j.scitotenv.2021.151925 (DOI)000820609600003 ()34838923 (PubMedID)
Forskningsfinansiär
EU, Europeiska forskningsrådet, 336642EU, Horisont 2020, 839709Deutsche Forschungsgemeinschaft (DFG), KO1911/6-1
Tillgänglig från: 2022-08-09 Skapad: 2022-08-09 Senast uppdaterad: 2022-08-09Bibliografiskt granskad
Jansen, J., Woolway, R. I., Kraemer, B. M., Albergel, C., Bastviken, D., Weyhenmeyer, G. A., . . . Jennings, E. (2022). Global increase in methane production under future warming of lake bottom waters. Global Change Biology, 28(18), 5427-5440
Öppna denna publikation i ny flik eller fönster >>Global increase in methane production under future warming of lake bottom waters
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2022 (Engelska)Ingår i: Global Change Biology, ISSN 1354-1013, E-ISSN 1365-2486, Vol. 28, nr 18, s. 5427-5440Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Lakes are significant emitters of methane to the atmosphere, and thus are important components of the global methane budget. Methane is typically produced in lake sediments, with the rate of methane production being strongly temperature dependent. Local and regional studies highlight the risk of increasing methane production under future climate change, but a global estimate is not currently available. Here, we project changes in global lake bottom temperatures and sediment methane production rates from 1901 to 2099. By the end of the 21st century, lake bottom temperatures are projected to increase globally, by an average of 0.86-2.60 degrees C under Representative Concentration Pathways (RCPs) 2.6-8.5, with greater warming projected at lower latitudes. This future warming of bottom waters will likely result in an increase in methane production rates of 13%-40% by the end of the century, with many low-latitude lakes experiencing an increase of up to 17 times the historical (1970-1999) global average under RCP 8.5. The projected increase in methane production will likely lead to higher emissions from lakes, although the exact magnitude of the emission increase requires more detailed regional studies.

Ort, förlag, år, upplaga, sidor
John Wiley & Sons, 2022
Nyckelord
aquatic, climate change, greenhouse gases, limnology, methane, temperature, tropics
Nationell ämneskategori
Miljövetenskap Klimatforskning
Identifikatorer
urn:nbn:se:uu:diva-485430 (URN)10.1111/gcb.16298 (DOI)000815351300001 ()35694903 (PubMedID)
Forskningsfinansiär
EU, FP7, Sjunde ramprogrammet, 336642EU, Horisont 2020, 725546Knut och Alice Wallenbergs Stiftelse, KAW 2018-0191Vetenskapsrådet, 2020-06460Vetenskapsrådet, 2018-04524Vetenskapsrådet, 2016-04829Vetenskapsrådet, 2020-03222Vetenskapsrådet, 2017-04405Forskningsrådet Formas, 2018-01794Forskningsrådet Formas, 2020-01091Deutsche Forschungsgemeinschaft (DFG), AD 91/22-1
Tillgänglig från: 2022-09-27 Skapad: 2022-09-27 Senast uppdaterad: 2022-09-27Bibliografiskt granskad
Grasset, C., Moras, S., Isidorova, A., Couture, R.-M., Linkhorst, A. & Sobek, S. (2021). An empirical model to predict methane production in inland water sediment from particular organic matter supply and reactivity. Limnology and Oceanography, 66(10), 3643-3655
Öppna denna publikation i ny flik eller fönster >>An empirical model to predict methane production in inland water sediment from particular organic matter supply and reactivity
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2021 (Engelska)Ingår i: Limnology and Oceanography, ISSN 0024-3590, E-ISSN 1939-5590, Vol. 66, nr 10, s. 3643-3655Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The highest CH4 production rates can be found in anoxic inland water surface sediments however no model quantifies CH4 production following fresh particular organic matter (POM) deposition on anoxic sediments. This limits our capability of modeling CH4 emissions from inland waters to the atmosphere. To generate such a model, we quantified how the POM supply rate and POM reactivity control CH4 production in anoxic surface sediment, by amending sediment at different frequencies with different quantities of aquatic and terrestrial POM. From the modeled CH4 production, we derived parameters related to the kinetics and the extent of CH4 production. We show that the extent of CH4 production can be well predicted by the quality (i.e., C/N ratio) and the quantity of POM supplied to an anoxic sediment. In particular, within the range of sedimentation rates that can be found in aquatic systems, we show that CH4 production increases linearly with the quantity of phytoplankton-derived and terrestrially derived POM. A high frequency of POM addition, which is a common situation in natural systems, resulted in higher peaks in CH4 production rates. This suggests that relationships derived from earlier incubation experiments that added POM only once, may result in underestimation of sediment CH4 production. Our results quantitatively couple CH4 production in anoxic surface sediment to POM sedimentation flux, and are therefore useful for the further development of mechanistic models of inland water CH4 emission.

Ort, förlag, år, upplaga, sidor
John Wiley & Sons, 2021
Nationell ämneskategori
Ekologi
Identifikatorer
urn:nbn:se:uu:diva-461035 (URN)10.1002/lno.11905 (DOI)000681100700001 ()
Forskningsfinansiär
EU, FP7, Sjunde ramprogrammet, 336642
Tillgänglig från: 2021-12-10 Skapad: 2021-12-10 Senast uppdaterad: 2024-04-05Bibliografiskt granskad
Paranaíba, J. R., Barros, N., Almeida, R. M., Mendonça, R., Linkhorst, A., do Vale, R., . . . Sobek, S. (2021). Hotspots of diffusive CO2 and CH4 emission from tropical reservoirs shift through time. Journal of Geophysical Research - Biogeosciences, 126(4), Article ID e2020JG006014.
Öppna denna publikation i ny flik eller fönster >>Hotspots of diffusive CO2 and CH4 emission from tropical reservoirs shift through time
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2021 (Engelska)Ingår i: Journal of Geophysical Research - Biogeosciences, ISSN 2169-8953, E-ISSN 2169-8961, Vol. 126, nr 4, artikel-id e2020JG006014Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The patterns of spatial and temporal variability in CO2 and CH4 emission from reservoirs are still poorly studied, especially in tropical regions where hydropower is growing. We performed spatially resolved measurements of dissolved CO2 and CH4 surface water concentrations and their gas-exchange coefficients (k) to compute diffusive carbon flux from four contrasting tropical reservoirs across Brazil during different hydrological seasons. We used an online equilibration system to measure dissolved CO2 and CH4 concentrations; we estimated k from floating chamber deployments in conjunction with discrete CO2 and CH4 water concentration measurements. Diffusive CO2 emissions were higher during dry season than during rainy season, whereas there were no consistent seasonal patterns for diffusive CH4 emissions. Our results reveal that the magnitude and the spatial within-reservoir patterns of diffusive CO2 and CH4 flux varied strongly among hydrological seasons. River inflow areas were often characterized by high seasonality in diffusive flux. Areas close to the dam generally showed low seasonal variability in diffusive CH4 flux but high variability in CO2 flux. Overall, we found that reservoir areas exhibiting highest emission rates (‘hotspots’) shifted substantially across hydrological seasons. Estimates of total diffusive carbon emission from the reservoir surfaces differed between hydrological seasons by a factor up to 7 in Chapéu D’Úvas, up to 13 in Curuá-Una, up to 4 in Furnas, and up to 1.8 in Funil, indicating that spatially-resolved measurements of CO2 and CH4 concentrations and k need to be performed at different hydrological seasons in order to constrain annual diffusive carbon emission.

Abstract [en]

Reservoirs are key for flood control, water supply, and hydropower generation. However, reservoirs are usually not carbon neutral. Studies worldwide point to reservoirs as important net sources of anthropogenic carbon emission to the atmosphere. Carbon emission from reservoirs derives from the decomposition of organic matter. Although carbon emission from reservoirs has been increasingly studied over the past two decades, most studies do not sufficiently describe emissions across space and time. Our study applies highly-resolved spatial coverage of dissolved surface water concentrations and gas-exchange coefficients of CO2 and CH4 to compute rates of CO2 and CH4 diffusion to the atmosphere across distinct hydrological seasons in four contrasting tropical reservoirs. We found that emissions varied substantially over both space and time. More specifically, we found that reservoir areas exhibiting highest emission rates ('hotspots') shifted substantially between dry and rainy seasons. Overlooking the spatial within-reservoir variability across seasons may result in serious under- or overestimations of total diffusive carbon emission from reservoirs, depending on the time and space that studies focus their sampling on. Our work may support scientists in adopting more comprehensive sampling strategies relevant for better constrained upscaling, and, consequently, support informed policy decisions and management actions.

Ort, förlag, år, upplaga, sidor
American Geophysical Union (AGU), 2021
Nationell ämneskategori
Klimatforskning Miljövetenskap Multidisciplinär geovetenskap Oceanografi, hydrologi och vattenresurser
Identifikatorer
urn:nbn:se:uu:diva-393437 (URN)10.1029/2020JG006014 (DOI)000645001600025 ()
Tillgänglig från: 2019-09-22 Skapad: 2019-09-22 Senast uppdaterad: 2024-01-15Bibliografiskt granskad
Linkhorst, A., Paranaíba, J. R., Mendonça, R., Rudberg, D., DelSontro, T., Barros, N. & Sobek, S. (2021). Spatially Resolved Measurements in Tropical Reservoirs Reveal Elevated Methane Ebullition at River Inflows and at High Productivity. Global Biogeochemical Cycles, 35(5), Article ID e2020GB006717.
Öppna denna publikation i ny flik eller fönster >>Spatially Resolved Measurements in Tropical Reservoirs Reveal Elevated Methane Ebullition at River Inflows and at High Productivity
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2021 (Engelska)Ingår i: Global Biogeochemical Cycles, ISSN 0886-6236, E-ISSN 1944-9224, Vol. 35, nr 5, artikel-id e2020GB006717Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

An increasing number of rivers are being dammed, particularly in the tropics, and reservoir water surfaces can be a substantial anthropogenic source of greenhouse gases. On average, 80% of the CO2-equivalent emission of reservoirs globally has been attributed to CH4, which is predominantly emitted via ebullition. Since ebullition is highly variable across space and time, both measuring and upscaling to an entire reservoir is challenging, and estimates of reservoir CH4 emission are therefore not well constrained. We measured CH4 ebullition at high spatial resolution with an echosounder and bubble traps in two reservoirs of different use (water storage and hydropower), size and productivity in the tropical Brazilian Atlantic Rainforest biome. Based on the spatially most well-resolved whole-reservoir ebullition measurements in the tropics so far, we found that mean CH4 ebullition was twice as high in river inflow areas than in other parts of the reservoirs, and more than four times higher in the eutrophic reservoir compared to the oligotrophic one. Using different upscaling approaches rendered similar whole-reservoir CH4 ebullition estimates, suggesting that highly spatially resolved measurements may be more important for constraining reservoir-wide CH4 estimates than choice of upscaling approach. The minimum sampling effort was high (>250 and >1700 30-m segments of hydroacoustic survey to reach within 50% or 80% accuracy, respectively). This suggests that traditional manual bubble trap measurements should be abandoned in favour of highly resolved measurements in order to get spatially representative estimates of CH4 ebullition, which accounted for 60 and 99% of total C emission in the two studied reservoirs.

Abstract [en]

Plain Language Summary:

Dam construction is currently booming, especially in the tropics, both for production of renewable hydropower and for water supply to a growing population. However, reservoirs can emit large amounts of the greenhouse gases carbon dioxide and methane to the atmosphere. The most climate-relevant emission from reservoirs typically stems from methane bubbles that form in the reservoir sediment and rise to the water surface, and it is challenging to quantify this sporadic bubbling across an entire reservoir. We measured methane bubbling in two reservoirs in Brazil, using a method that allows for a very high spatial coverage. We found a two times higher methane bubble emission from areas in which rivers are entering the reservoirs as compared to areas further away from river inflows. Also, methane bubble emission was four times higher in the nutrient-rich reservoir than in the nutrient-poor reservoir. We found that the minimum number of sampling sites required for a representative whole-reservoir methane bubble emission estimate was high, calling for the use of spatially highly resolved methods.

Ort, förlag, år, upplaga, sidor
American Geophysical Union (AGU), 2021
Nationell ämneskategori
Miljövetenskap Klimatforskning Multidisciplinär geovetenskap Oceanografi, hydrologi och vattenresurser
Identifikatorer
urn:nbn:se:uu:diva-393434 (URN)10.1029/2020GB006717 (DOI)000655225100005 ()
Forskningsfinansiär
EU, FP7, Sjunde ramprogrammet, 336642
Tillgänglig från: 2019-09-22 Skapad: 2019-09-22 Senast uppdaterad: 2024-01-15Bibliografiskt granskad
Linkhorst, A., Hiller, C., DelSontro, T., Azevedo, G. M., Barros, N., Mendonça, R. & Sobek, S. (2020). Comparing methane ebullition variability across space and time in a Brazilian reservoir. Limnology and Oceanography, 65(7), 1623-1634
Öppna denna publikation i ny flik eller fönster >>Comparing methane ebullition variability across space and time in a Brazilian reservoir
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2020 (Engelska)Ingår i: Limnology and Oceanography, ISSN 0024-3590, E-ISSN 1939-5590, Vol. 65, nr 7, s. 1623-1634Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The potent greenhouse gas methane (CH4) is readily emitted from tropical reservoirs, often via ebullition (bubbles). This highly stochastic emission pathway varies in space and time, however, hampering efforts to accurately assess total CH4 emissions from water bodies. We systematically studied both the spatial and temporal scales of ebullition variability in a river inflow bay of a tropical Brazilian reservoir. We conducted multiple highly resolved spatial surveys of CH4 ebullition using a hydroacoustic approach supplemented with bubble traps over a 12‐month and a 2‐week timescale to evaluate which scale of variation was more important. To quantify the spatial and temporal variability of CH4 ebullition, we used the quartile coefficients of dispersion at each point in space and time and compared their frequency distributions across the various temporal and spatial scales. We found that CH4 ebullition varied more temporally than spatially and that the intra‐annual variability was stronger than daily variability within 2 weeks. We also found that CH4 ebullition was positively related to water temperature increase and pressure decrease, but no consistent relationship with water column depth or sediment characteristics was found, further highlighting that temporal drivers of emissions were stronger than spatial drivers. Annual estimates of CH4 ebullition from our study area may vary by 75–174% if ebullition is not resolved in time and space, but at a minimum we recommend conducting spatially resolved measurements at least once during each major hydrologic season in tropical regions (i.e., in dry and rainy season when water levels are falling and rising, respectively).

Nyckelord
CH4, carbon cycle, lake, biogeochemistry, spatial, temporal scale
Nationell ämneskategori
Klimatforskning Miljövetenskap Multidisciplinär geovetenskap Oceanografi, hydrologi och vattenresurser
Forskningsämne
Biologi med inriktning mot limnologi
Identifikatorer
urn:nbn:se:uu:diva-393435 (URN)10.1002/lno.11410 (DOI)000547708600012 ()
Forskningsfinansiär
EU, FP7, Sjunde ramprogrammet, 336642
Tillgänglig från: 2019-09-22 Skapad: 2019-09-22 Senast uppdaterad: 2020-09-17Bibliografiskt granskad
Quadra, G. R., Sobek, S., Paranaíba, J. R., Isidorova, A., Roland, F., do Vale, R. & Mendonça, R. (2020). High organic carbon burial but high potential for methane ebullition in the sediments of an Amazonian hydroelectric reservoir. Biogeosciences, 17(6), 1495-1505
Öppna denna publikation i ny flik eller fönster >>High organic carbon burial but high potential for methane ebullition in the sediments of an Amazonian hydroelectric reservoir
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2020 (Engelska)Ingår i: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189, Vol. 17, nr 6, s. 1495-1505Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Reservoir sediments sequester significant amounts of organic carbon (OC), but at the same time, high amounts of methane (CH4) can be produced and emitted during the degradation of sediment OC. While the greenhouse gas emission of reservoirs has received a lot of attention, there is a lack of studies focusing on OC burial. In particular, there are no studies on reservoir OC burial in the Amazon, even though hydropower is expanding in the basin. Here we present results from the first investigation of OC burial and CH4 concentrations in the sediments of an Amazonian hydroelectric reservoir. We performed sub-bottom profiling, sediment coring and sediment pore water analysis in the Curuá Una (CUN) reservoir (Amazon, Brazil) during rising- and falling-water periods. The spatially resolved average sediment accumulation rate was 0.6 cm yr−1, and the average OC burial rate was 91 g C m−2 yr−1. This is the highest OC burial rate on record for low-latitude hydroelectric reservoirs. Such a high rate probably results from a high OC deposition onto the sediment, which compensates the high OC mineralization at a 28–30 ∘C water temperature. Elevated OC burial was found near the dam and close to major river inflow areas. C:N ratios between 10.3 and 17 (average ± SD: 12.9±2.1) suggest that both land-derived and aquatic OC accumulate in CUN sediments. About 23 % of the sediment pore water samples had dissolved CH4 above the saturation concentration. This represents a higher share than in other hydroelectric reservoirs, indicating a high potential for CH4 ebullition, particularly in river inflow areas.

Nationell ämneskategori
Oceanografi, hydrologi och vattenresurser
Identifikatorer
urn:nbn:se:uu:diva-408491 (URN)10.5194/bg-17-1495-2020 (DOI)000522152700001 ()
Tillgänglig från: 2020-04-07 Skapad: 2020-04-07 Senast uppdaterad: 2020-06-23Bibliografiskt granskad
Toming, K., Kotta, J., Uuemaa, E., Sobek, S., Kutser, T. & Tranvik, L. (2020). Predicting lake dissolved organic carbon at a global scale. Scientific Reports, 10(1), 1-8, Article ID 8471.
Öppna denna publikation i ny flik eller fönster >>Predicting lake dissolved organic carbon at a global scale
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2020 (Engelska)Ingår i: Scientific Reports, E-ISSN 2045-2322, Vol. 10, nr 1, s. 1-8, artikel-id 8471Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The pool of dissolved organic carbon (DOC), is one of the main regulators of the ecology and biogeochemistry of inland water ecosystems, and an important loss term in the carbon budgets of land ecosystems. We used a novel machine learning technique and global databases to test if and how different environmental factors contribute to the variability of in situ DOC concentrations in lakes. In order to estimate DOC in lakes globally we predicted DOC in each lake with a surface area larger than 0.1 km2. Catchment properties and meteorological and hydrological features explained most of the variability of the lake DOC concentration, whereas lake morphometry played only a marginal role. The predicted average of the global DOC concentration in lake water was 3.88 mg L−1. The global predicted pool of DOC in lake water was 729 Tg from which 421 Tg was the share of the Caspian Sea. The results provide global-scale evidence for ecological, climate and carbon cycle models of lake ecosystems and related future prognoses.

Ort, förlag, år, upplaga, sidor
Springer Nature, 2020
Nationell ämneskategori
Geokemi
Identifikatorer
urn:nbn:se:uu:diva-414227 (URN)10.1038/s41598-020-65010-3 (DOI)000558756600001 ()32439876 (PubMedID)
Tillgänglig från: 2020-06-24 Skapad: 2020-06-24 Senast uppdaterad: 2022-09-15Bibliografiskt granskad
Paranaíba, J. R. (2020). Supplemental data: Hotspots of diffusive CO2 and CH4 emission from tropical reservoirs shift through time.
Öppna denna publikation i ny flik eller fönster >>Supplemental data: Hotspots of diffusive CO2 and CH4 emission from tropical reservoirs shift through time
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2020 (Engelska)Dataset
Nationell ämneskategori
Ekologi Miljövetenskap Klimatforskning
Identifikatorer
urn:nbn:se:uu:diva-429477 (URN)
Tillgänglig från: 2020-12-26 Skapad: 2020-12-26 Senast uppdaterad: 2021-06-10
Projekt
In-situ mätning av gasutbytet över sjösediment - en förutsättning för ökad kunskap om en betydande växthusgaskälla i det skogslandskap [2011-04511_VR]; Uppsala universitetEn kopplad geomorfologisk-biogeokemisk modell för processbaserad prediktion av metanemission från inlandsvatten via gasbubblor [2017-04405_VR]; Uppsala universitet
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0003-1351-9277

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