Carbon emission from thermokarst lakes in NE European tundra
Emission of greenhouse gases (GHGs) from inland waters is recognized as highly important and an understudied part of the terrestrial carbon (C) biogeochemical cycle. These emissions are still poorly quantified in subarctic regions that contain vast amounts of surface C in permafrost peatlands. This...
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ftird:oai:ird.fr:fdi:010079357 2024-09-15T18:29:51+00:00 Carbon emission from thermokarst lakes in NE European tundra Zabelina, S. A. Shirokova, L. S. Klimov, S. I. Chupakov, A. V. Lim, A. G. Polishchuk, Y. M. Polishchuk, V. Y. Bogdanov, A. N. Muratov, I. N. /Guérin, Frédéric Karlsson, J. Pokrovsky, O. S. RUSSIE 2021 https://www.documentation.ird.fr/hor/fdi:010079357 EN eng https://www.documentation.ird.fr/hor/fdi:010079357 oai:ird.fr:fdi:010079357 Zabelina S. A., Shirokova L. S., Klimov S. I., Chupakov A. V., Lim A. G., Polishchuk Y. M., Polishchuk V. Y., Bogdanov A. N., Muratov I. N., Guérin Frédéric, Karlsson J., Pokrovsky O. S. Carbon emission from thermokarst lakes in NE European tundra. 2021, 66 (suppl. 1), S216-S230 text 2021 ftird 2024-08-15T05:57:40Z Emission of greenhouse gases (GHGs) from inland waters is recognized as highly important and an understudied part of the terrestrial carbon (C) biogeochemical cycle. These emissions are still poorly quantified in subarctic regions that contain vast amounts of surface C in permafrost peatlands. This is especially true in NE European peatlands, located within sporadic to discontinuous permafrost zones which are highly vulnerable to thaw. Initial measurements of C emissions from lentic waters of the Bolshezemelskaya Tundra (BZT; 200,000 km(2)) demonstrated sizable CO(2)and CH(4)concentrations and fluxes to the atmosphere in 98 depressions, thaw ponds, and thermokarst lakes ranging from 0.5 x 10(6)to 5 x 10(6) m(2)in size. CO(2)fluxes decreased by an order of magnitude as waterbody size increased by > 3 orders of magnitude while CH(4)fluxes showed large variability unrelated to lake size. By using a combination of Landsat-8 and GeoEye-1 images, we determined lakes cover 4% of BZT and thus calculated overall C emissions from lentic waters to be 3.8 +/- 0.65 Tg C yr(-1)(99% C-CO2, 1% C-CH4), which is two times higher than the lateral riverine export. Large lakes dominated GHG emissions whereas small thaw ponds had a minor contribution to overall water surface area and GHG emissions. These data suggest that, if permafrost thaw in NE Europe results in disappearance of large thermokarst lakes and formation of new small thaw ponds and depressions, GHG emissions from lentic waters in this region may decrease. Text permafrost Subarctic Thermokarst Tundra IRD (Institute de recherche pour le développement): Horizon |
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IRD (Institute de recherche pour le développement): Horizon |
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English |
description |
Emission of greenhouse gases (GHGs) from inland waters is recognized as highly important and an understudied part of the terrestrial carbon (C) biogeochemical cycle. These emissions are still poorly quantified in subarctic regions that contain vast amounts of surface C in permafrost peatlands. This is especially true in NE European peatlands, located within sporadic to discontinuous permafrost zones which are highly vulnerable to thaw. Initial measurements of C emissions from lentic waters of the Bolshezemelskaya Tundra (BZT; 200,000 km(2)) demonstrated sizable CO(2)and CH(4)concentrations and fluxes to the atmosphere in 98 depressions, thaw ponds, and thermokarst lakes ranging from 0.5 x 10(6)to 5 x 10(6) m(2)in size. CO(2)fluxes decreased by an order of magnitude as waterbody size increased by > 3 orders of magnitude while CH(4)fluxes showed large variability unrelated to lake size. By using a combination of Landsat-8 and GeoEye-1 images, we determined lakes cover 4% of BZT and thus calculated overall C emissions from lentic waters to be 3.8 +/- 0.65 Tg C yr(-1)(99% C-CO2, 1% C-CH4), which is two times higher than the lateral riverine export. Large lakes dominated GHG emissions whereas small thaw ponds had a minor contribution to overall water surface area and GHG emissions. These data suggest that, if permafrost thaw in NE Europe results in disappearance of large thermokarst lakes and formation of new small thaw ponds and depressions, GHG emissions from lentic waters in this region may decrease. |
format |
Text |
author |
Zabelina, S. A. Shirokova, L. S. Klimov, S. I. Chupakov, A. V. Lim, A. G. Polishchuk, Y. M. Polishchuk, V. Y. Bogdanov, A. N. Muratov, I. N. /Guérin, Frédéric Karlsson, J. Pokrovsky, O. S. |
spellingShingle |
Zabelina, S. A. Shirokova, L. S. Klimov, S. I. Chupakov, A. V. Lim, A. G. Polishchuk, Y. M. Polishchuk, V. Y. Bogdanov, A. N. Muratov, I. N. /Guérin, Frédéric Karlsson, J. Pokrovsky, O. S. Carbon emission from thermokarst lakes in NE European tundra |
author_facet |
Zabelina, S. A. Shirokova, L. S. Klimov, S. I. Chupakov, A. V. Lim, A. G. Polishchuk, Y. M. Polishchuk, V. Y. Bogdanov, A. N. Muratov, I. N. /Guérin, Frédéric Karlsson, J. Pokrovsky, O. S. |
author_sort |
Zabelina, S. A. |
title |
Carbon emission from thermokarst lakes in NE European tundra |
title_short |
Carbon emission from thermokarst lakes in NE European tundra |
title_full |
Carbon emission from thermokarst lakes in NE European tundra |
title_fullStr |
Carbon emission from thermokarst lakes in NE European tundra |
title_full_unstemmed |
Carbon emission from thermokarst lakes in NE European tundra |
title_sort |
carbon emission from thermokarst lakes in ne european tundra |
publishDate |
2021 |
url |
https://www.documentation.ird.fr/hor/fdi:010079357 |
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RUSSIE |
genre |
permafrost Subarctic Thermokarst Tundra |
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permafrost Subarctic Thermokarst Tundra |
op_relation |
https://www.documentation.ird.fr/hor/fdi:010079357 oai:ird.fr:fdi:010079357 Zabelina S. A., Shirokova L. S., Klimov S. I., Chupakov A. V., Lim A. G., Polishchuk Y. M., Polishchuk V. Y., Bogdanov A. N., Muratov I. N., Guérin Frédéric, Karlsson J., Pokrovsky O. S. Carbon emission from thermokarst lakes in NE European tundra. 2021, 66 (suppl. 1), S216-S230 |
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1810471309430226944 |