Deep ice-Rich permafrost and Its Carbon Vulnerability
Arctic landscapes, especially those 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 Yedoma permafrost, rapid and...
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ftawi:oai:epic.awi.de:45149 2024-09-15T18:11:23+00:00 Deep ice-Rich permafrost and Its Carbon Vulnerability Strauss, Jens 2017-07-06 application/pdf https://epic.awi.de/id/eprint/45149/ https://epic.awi.de/id/eprint/45149/1/Strauss_ACOP2017_PlenarySession.pdf https://hdl.handle.net/10013/epic.51418 https://hdl.handle.net/10013/epic.51418.d001 unknown https://epic.awi.de/id/eprint/45149/1/Strauss_ACOP2017_PlenarySession.pdf https://hdl.handle.net/10013/epic.51418.d001 Strauss, J. orcid:0000-0003-4678-4982 (2017) Deep ice-Rich permafrost and Its Carbon Vulnerability , 2nd Asian Conference on Permafrost, Sapporo, Japan, 2 July 2017 - 6 July 2017 . hdl:10013/epic.51418 EPIC32nd Asian Conference on Permafrost, Sapporo, Japan, 2017-07-02-2017-07-06 Conference notRev 2017 ftawi 2024-06-24T04:17:43Z Arctic landscapes, especially those 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 Yedoma permafrost, rapid and deep thaw processes cause surface subsidence due to loss of ground ice (Ulrich et al., 2014) and may mobilize deep organic carbon. With thawing, currently freeze-locked organic matter can be remobilized and contribute to the carbon-climate feedback, a process of global significance if formerly inactive, old carbon is re-introduced into the active carbon cycle as greenhouse gases, which accelerate warming and inducing more permafrost thaw and carbon release. Yedoma permafrost, which is widespread in Siberia and Alaska, is estimated to presently store between 83±12 and 129±30 Gt frozen organic carbon (Strauss et al., 2017). During the last glacial period Yedoma deposits potentially stored about 657 ± 97 Gt (Strauss et al., 2017). Focusing on the estimates for the present and including deposits in degradation features, such as thermokarst lakes and basins, we found ~398 gigatons thaw-susceptible carbon in the Yedoma domain. This is more than 25% of the frozen carbon of the permafrost area, while the Yedoma domain is covering only 7% of the permafrost region. We suggest that greenhouse gas release from the Yedoma domain is orders of magnitudes lower than current human-caused emissions, but will be a persistent source that increases in the future. Based on incubation experiments, up to 10% of the Yedoma carbon is considered especially decomposable and may be released upon thaw (Schädel et al., 2014). In conclusion, the substantial amount of ground ice in Yedoma makes this type of permafrost deposit highly vulnerable to disturbances such as thermokarst and thermo-erosion processes and as a result, mobilization of permafrost carbon is expected to increase under future climate warming. Our results underline the need of ... 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) |
op_collection_id |
ftawi |
language |
unknown |
description |
Arctic landscapes, especially those 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 Yedoma permafrost, rapid and deep thaw processes cause surface subsidence due to loss of ground ice (Ulrich et al., 2014) and may mobilize deep organic carbon. With thawing, currently freeze-locked organic matter can be remobilized and contribute to the carbon-climate feedback, a process of global significance if formerly inactive, old carbon is re-introduced into the active carbon cycle as greenhouse gases, which accelerate warming and inducing more permafrost thaw and carbon release. Yedoma permafrost, which is widespread in Siberia and Alaska, is estimated to presently store between 83±12 and 129±30 Gt frozen organic carbon (Strauss et al., 2017). During the last glacial period Yedoma deposits potentially stored about 657 ± 97 Gt (Strauss et al., 2017). Focusing on the estimates for the present and including deposits in degradation features, such as thermokarst lakes and basins, we found ~398 gigatons thaw-susceptible carbon in the Yedoma domain. This is more than 25% of the frozen carbon of the permafrost area, while the Yedoma domain is covering only 7% of the permafrost region. We suggest that greenhouse gas release from the Yedoma domain is orders of magnitudes lower than current human-caused emissions, but will be a persistent source that increases in the future. Based on incubation experiments, up to 10% of the Yedoma carbon is considered especially decomposable and may be released upon thaw (Schädel et al., 2014). In conclusion, the substantial amount of ground ice in Yedoma makes this type of permafrost deposit highly vulnerable to disturbances such as thermokarst and thermo-erosion processes and as a result, mobilization of permafrost carbon is expected to increase under future climate warming. Our results underline the need of ... |
format |
Conference Object |
author |
Strauss, Jens |
spellingShingle |
Strauss, Jens Deep ice-Rich permafrost and Its Carbon Vulnerability |
author_facet |
Strauss, Jens |
author_sort |
Strauss, Jens |
title |
Deep ice-Rich permafrost and Its Carbon Vulnerability |
title_short |
Deep ice-Rich permafrost and Its Carbon Vulnerability |
title_full |
Deep ice-Rich permafrost and Its Carbon Vulnerability |
title_fullStr |
Deep ice-Rich permafrost and Its Carbon Vulnerability |
title_full_unstemmed |
Deep ice-Rich permafrost and Its Carbon Vulnerability |
title_sort |
deep ice-rich permafrost and its carbon vulnerability |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/45149/ https://epic.awi.de/id/eprint/45149/1/Strauss_ACOP2017_PlenarySession.pdf https://hdl.handle.net/10013/epic.51418 https://hdl.handle.net/10013/epic.51418.d001 |
genre |
Ice permafrost Thermokarst Alaska Siberia |
genre_facet |
Ice permafrost Thermokarst Alaska Siberia |
op_source |
EPIC32nd Asian Conference on Permafrost, Sapporo, Japan, 2017-07-02-2017-07-06 |
op_relation |
https://epic.awi.de/id/eprint/45149/1/Strauss_ACOP2017_PlenarySession.pdf https://hdl.handle.net/10013/epic.51418.d001 Strauss, J. orcid:0000-0003-4678-4982 (2017) Deep ice-Rich permafrost and Its Carbon Vulnerability , 2nd Asian Conference on Permafrost, Sapporo, Japan, 2 July 2017 - 6 July 2017 . hdl:10013/epic.51418 |
_version_ |
1810448975394766848 |