Deep permafrost carbon pools and their vulnerability to mobilization
Arctic landscapes underlain by permafrost are threatened by climate warming and may degrade in different ways, including active layer deepening, thermal erosion, and development of thermokarst features. In Siberian and Alaskan late Pleistocene ice-rich permafrost, rapid and deep thaw processes cause...
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ftawi:oai:epic.awi.de:51400 2024-09-15T18:11:23+00:00 Deep permafrost carbon pools and their vulnerability to mobilization Strauss, Jens 2020-03-02 https://epic.awi.de/id/eprint/51400/ https://hdl.handle.net/10013/epic.5ac871dc-f7eb-411e-8de2-eb6b41c77cb5 unknown Earth and Life Institute Strauss, J. orcid:0000-0003-4678-4982 (2020) Deep permafrost carbon pools and their vulnerability to mobilization , The Impact of Climate Change, Louvain-la-Neuve, Université catholique de Louvain, Earth and Life Institute, Belgium, 2 March 2020 - 3 March 2020 . hdl:10013/epic.5ac871dc-f7eb-411e-8de2-eb6b41c77cb5 EPIC3The Impact of Climate Change, Louvain-la-Neuve, Université catholique de Louvain, Earth and Life Institute, Belgium, 2020-03-02-2020-03-03Earth and Life Institute Conference notRev 2020 ftawi 2024-06-24T04:23:24Z Arctic landscapes underlain by permafrost are threatened by climate warming and may degrade in different ways, including active layer deepening, thermal erosion, and development of thermokarst features. In Siberian and Alaskan late Pleistocene ice-rich permafrost, rapid and deep thaw processes cause surface subsidence due to loss of ground ice and mobilisation deep organic matter. With thawing, formerly freeze-locked organic matter is remobilized. This contributes to the carbon-climate feedback by reactivation of old carbon as greenhouse gases. The permafrost carbon climate feedback has been a process of global significance in the past and may contribute to acceleration of climate warming. In my research, I studied the carbon pools of the deep and ice-rich Yedoma permafrost, which is widespread in Siberia, Alaska and parts of NW Canada. I led data synthesis efforts and analysed field data to estimate that the Yedoma presently stores between 83±12 and 129±30 Gt of frozen organic carbon. During the last glacial period, such deposits potentially stored about 657 ± 97 Gt of organic carbon. Focusing on the estimates for the present and including deposits in degradation features we found ~398 Gt thaw-susceptible carbon in the Yedoma domain. While the Yedoma domain is covering only 7 % of the permafrost region, it represents more than 25 % of the frozen soil carbon pool of the permafrost zone. Conference Object Ice permafrost Thermokarst Alaska Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Arctic landscapes underlain by permafrost are threatened by climate warming and may degrade in different ways, including active layer deepening, thermal erosion, and development of thermokarst features. In Siberian and Alaskan late Pleistocene ice-rich permafrost, rapid and deep thaw processes cause surface subsidence due to loss of ground ice and mobilisation deep organic matter. With thawing, formerly freeze-locked organic matter is remobilized. This contributes to the carbon-climate feedback by reactivation of old carbon as greenhouse gases. The permafrost carbon climate feedback has been a process of global significance in the past and may contribute to acceleration of climate warming. In my research, I studied the carbon pools of the deep and ice-rich Yedoma permafrost, which is widespread in Siberia, Alaska and parts of NW Canada. I led data synthesis efforts and analysed field data to estimate that the Yedoma presently stores between 83±12 and 129±30 Gt of frozen organic carbon. During the last glacial period, such deposits potentially stored about 657 ± 97 Gt of organic carbon. Focusing on the estimates for the present and including deposits in degradation features we found ~398 Gt thaw-susceptible carbon in the Yedoma domain. While the Yedoma domain is covering only 7 % of the permafrost region, it represents more than 25 % of the frozen soil carbon pool of the permafrost zone. |
format |
Conference Object |
author |
Strauss, Jens |
spellingShingle |
Strauss, Jens Deep permafrost carbon pools and their vulnerability to mobilization |
author_facet |
Strauss, Jens |
author_sort |
Strauss, Jens |
title |
Deep permafrost carbon pools and their vulnerability to mobilization |
title_short |
Deep permafrost carbon pools and their vulnerability to mobilization |
title_full |
Deep permafrost carbon pools and their vulnerability to mobilization |
title_fullStr |
Deep permafrost carbon pools and their vulnerability to mobilization |
title_full_unstemmed |
Deep permafrost carbon pools and their vulnerability to mobilization |
title_sort |
deep permafrost carbon pools and their vulnerability to mobilization |
publisher |
Earth and Life Institute |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/51400/ https://hdl.handle.net/10013/epic.5ac871dc-f7eb-411e-8de2-eb6b41c77cb5 |
genre |
Ice permafrost Thermokarst Alaska Siberia |
genre_facet |
Ice permafrost Thermokarst Alaska Siberia |
op_source |
EPIC3The Impact of Climate Change, Louvain-la-Neuve, Université catholique de Louvain, Earth and Life Institute, Belgium, 2020-03-02-2020-03-03Earth and Life Institute |
op_relation |
Strauss, J. orcid:0000-0003-4678-4982 (2020) Deep permafrost carbon pools and their vulnerability to mobilization , The Impact of Climate Change, Louvain-la-Neuve, Université catholique de Louvain, Earth and Life Institute, Belgium, 2 March 2020 - 3 March 2020 . hdl:10013/epic.5ac871dc-f7eb-411e-8de2-eb6b41c77cb5 |
_version_ |
1810448975565684736 |