Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta
Soils in the permafrost region have acted as carbon sinks for thousands of years. As a result of global warming, permafrost soils are thawing and will potentially release greenhouse gases (GHGs) such as methane (CH4) and carbon dioxide (CO2). However, small-scale spatial heterogeneities of GHG produ...
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2023
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5018479 2023-07-02T03:32:53+02:00 Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta Laurent, M. Fuchs, M. Herbst, T. Runge, A. Liebner, S. Treat, C. 2023 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018479 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018479_1/component/file_5018776/5018479.pdf eng eng info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-20-2049-2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018479 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018479_1/component/file_5018776/5018479.pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ Biogeosciences info:eu-repo/semantics/article 2023 ftgfzpotsdam https://doi.org/10.5194/bg-20-2049-2023 2023-06-11T23:39:57Z Soils in the permafrost region have acted as carbon sinks for thousands of years. As a result of global warming, permafrost soils are thawing and will potentially release greenhouse gases (GHGs) such as methane (CH4) and carbon dioxide (CO2). However, small-scale spatial heterogeneities of GHG production have been neglected in previous incubation studies. Here, we used an anaerobic incubation experiment to simulate permafrost thaw along a transect from upland Yedoma to the floodplain on Kurungnakh Island. Potential CO2 and CH4 production was measured during incubation of the active layer and permafrost soils at 4 and 20 ∘C, first for 60 d (approximate length of the growing season) and then continuing for 1 year. An assessment of methanogen abundance was performed in parallel for the first 60 d. Yedoma samples from upland and slope cores remained in a lag phase during the growing season simulation, while those located in the floodplain showed high production of CH4 (6.5×103 µg CH4-C g−1 C) and CO2 (6.9×103 µg CO2-C g−1 C) at 20 ∘C. The Yedoma samples from the permafrost layer started producing CH4 after 6 months of incubation. We conclude that landscape position is a key factor triggering CH4 production during the growing season time on Kurungnakh Island. Article in Journal/Newspaper lena delta permafrost GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Biogeosciences 20 11 2049 2064 |
institution |
Open Polar |
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GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Soils in the permafrost region have acted as carbon sinks for thousands of years. As a result of global warming, permafrost soils are thawing and will potentially release greenhouse gases (GHGs) such as methane (CH4) and carbon dioxide (CO2). However, small-scale spatial heterogeneities of GHG production have been neglected in previous incubation studies. Here, we used an anaerobic incubation experiment to simulate permafrost thaw along a transect from upland Yedoma to the floodplain on Kurungnakh Island. Potential CO2 and CH4 production was measured during incubation of the active layer and permafrost soils at 4 and 20 ∘C, first for 60 d (approximate length of the growing season) and then continuing for 1 year. An assessment of methanogen abundance was performed in parallel for the first 60 d. Yedoma samples from upland and slope cores remained in a lag phase during the growing season simulation, while those located in the floodplain showed high production of CH4 (6.5×103 µg CH4-C g−1 C) and CO2 (6.9×103 µg CO2-C g−1 C) at 20 ∘C. The Yedoma samples from the permafrost layer started producing CH4 after 6 months of incubation. We conclude that landscape position is a key factor triggering CH4 production during the growing season time on Kurungnakh Island. |
format |
Article in Journal/Newspaper |
author |
Laurent, M. Fuchs, M. Herbst, T. Runge, A. Liebner, S. Treat, C. |
spellingShingle |
Laurent, M. Fuchs, M. Herbst, T. Runge, A. Liebner, S. Treat, C. Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
author_facet |
Laurent, M. Fuchs, M. Herbst, T. Runge, A. Liebner, S. Treat, C. |
author_sort |
Laurent, M. |
title |
Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
title_short |
Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
title_full |
Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
title_fullStr |
Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
title_full_unstemmed |
Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
title_sort |
relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the lena delta |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018479 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018479_1/component/file_5018776/5018479.pdf |
genre |
lena delta permafrost |
genre_facet |
lena delta permafrost |
op_source |
Biogeosciences |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-20-2049-2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018479 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018479_1/component/file_5018776/5018479.pdf |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5194/bg-20-2049-2023 |
container_title |
Biogeosciences |
container_volume |
20 |
container_issue |
11 |
container_start_page |
2049 |
op_container_end_page |
2064 |
_version_ |
1770272583719059456 |