Short and Long-Term Controls on Active Layer and Permafrost Carbon Turnover Across the Arctic
Decomposition of soil organic matter (SOM) in permafrost terrain and the production of greenhouse gases is a key factor for understanding climate change-carbon feedbacks. Previous studies have shown that SOM decomposition is mostly controlled by soil temperature, soil moisture, and carbon-nitrogen r...
Published in: | Journal of Geophysical Research: Biogeosciences |
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Online Access: | https://lup.lub.lu.se/record/fb38887d-1e01-468f-84ef-d7a2b6dc62c1 https://doi.org/10.1002/2017JG004069 |
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ftulundlup:oai:lup.lub.lu.se:fb38887d-1e01-468f-84ef-d7a2b6dc62c1 2023-05-15T14:51:10+02:00 Short and Long-Term Controls on Active Layer and Permafrost Carbon Turnover Across the Arctic Faucherre, Samuel Jørgensen, Christian Juncher Blok, Daan Weiss, Niels Siewert, Matthias Benjamin Bang-Andreasen, Toke Hugelius, Gustaf Kuhry, Peter Elberling, Bo 2018-02-17 https://lup.lub.lu.se/record/fb38887d-1e01-468f-84ef-d7a2b6dc62c1 https://doi.org/10.1002/2017JG004069 eng eng Wiley https://lup.lub.lu.se/record/fb38887d-1e01-468f-84ef-d7a2b6dc62c1 http://dx.doi.org/10.1002/2017JG004069 scopus:85042108000 Journal of Geophysical Research - Biogeosciences; 123(2), pp 372-390 (2018) ISSN: 2169-8953 Physical Geography Climate Research Carbon Carbon dioxide Carbon mineralization Decomposition Permafrost contributiontojournal/article info:eu-repo/semantics/article text 2018 ftulundlup https://doi.org/10.1002/2017JG004069 2023-02-01T23:35:54Z Decomposition of soil organic matter (SOM) in permafrost terrain and the production of greenhouse gases is a key factor for understanding climate change-carbon feedbacks. Previous studies have shown that SOM decomposition is mostly controlled by soil temperature, soil moisture, and carbon-nitrogen ratio (C:N). However, focus has generally been on site-specific processes and little is known about variations in the controls on SOM decomposition across Arctic sites. For assessing SOM decomposition, we retrieved 241 samples from 101 soil profiles across three contrasting Arctic regions and incubated them in the laboratory under aerobic conditions. We assessed soil carbon losses (Closs) five times during a 1 year incubation. The incubated material consisted of near-surface active layer (ALNS), subsurface active layer (ALSS), peat, and permafrost samples. Samples were analyzed for carbon, nitrogen, water content, δ13C, δ15N, and dry bulk density (DBD). While no significant differences were observed between total ALSS and permafrost Closs over 1 year incubation (2.3 ± 2.4% and 2.5 ± 1.5% Closs, respectively), ALNS samples showed higher Closs (7.9 ± 4.2%). DBD was the best explanatory parameter for active layer Closs across sites. Additionally, results of permafrost samples show that C:N ratio can be used to characterize initial Closs between sites. This data set on the influence of abiotic parameter on microbial SOM decomposition can improve model simulations of Arctic soil CO2 production by providing representative mean values of CO2 production rates and identifying standard parameters or proxies for upscaling potential CO2 production from site to regional scales. Article in Journal/Newspaper Arctic Climate change permafrost Lund University Publications (LUP) Arctic Journal of Geophysical Research: Biogeosciences 123 2 372 390 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography Climate Research Carbon Carbon dioxide Carbon mineralization Decomposition Permafrost |
spellingShingle |
Physical Geography Climate Research Carbon Carbon dioxide Carbon mineralization Decomposition Permafrost Faucherre, Samuel Jørgensen, Christian Juncher Blok, Daan Weiss, Niels Siewert, Matthias Benjamin Bang-Andreasen, Toke Hugelius, Gustaf Kuhry, Peter Elberling, Bo Short and Long-Term Controls on Active Layer and Permafrost Carbon Turnover Across the Arctic |
topic_facet |
Physical Geography Climate Research Carbon Carbon dioxide Carbon mineralization Decomposition Permafrost |
description |
Decomposition of soil organic matter (SOM) in permafrost terrain and the production of greenhouse gases is a key factor for understanding climate change-carbon feedbacks. Previous studies have shown that SOM decomposition is mostly controlled by soil temperature, soil moisture, and carbon-nitrogen ratio (C:N). However, focus has generally been on site-specific processes and little is known about variations in the controls on SOM decomposition across Arctic sites. For assessing SOM decomposition, we retrieved 241 samples from 101 soil profiles across three contrasting Arctic regions and incubated them in the laboratory under aerobic conditions. We assessed soil carbon losses (Closs) five times during a 1 year incubation. The incubated material consisted of near-surface active layer (ALNS), subsurface active layer (ALSS), peat, and permafrost samples. Samples were analyzed for carbon, nitrogen, water content, δ13C, δ15N, and dry bulk density (DBD). While no significant differences were observed between total ALSS and permafrost Closs over 1 year incubation (2.3 ± 2.4% and 2.5 ± 1.5% Closs, respectively), ALNS samples showed higher Closs (7.9 ± 4.2%). DBD was the best explanatory parameter for active layer Closs across sites. Additionally, results of permafrost samples show that C:N ratio can be used to characterize initial Closs between sites. This data set on the influence of abiotic parameter on microbial SOM decomposition can improve model simulations of Arctic soil CO2 production by providing representative mean values of CO2 production rates and identifying standard parameters or proxies for upscaling potential CO2 production from site to regional scales. |
format |
Article in Journal/Newspaper |
author |
Faucherre, Samuel Jørgensen, Christian Juncher Blok, Daan Weiss, Niels Siewert, Matthias Benjamin Bang-Andreasen, Toke Hugelius, Gustaf Kuhry, Peter Elberling, Bo |
author_facet |
Faucherre, Samuel Jørgensen, Christian Juncher Blok, Daan Weiss, Niels Siewert, Matthias Benjamin Bang-Andreasen, Toke Hugelius, Gustaf Kuhry, Peter Elberling, Bo |
author_sort |
Faucherre, Samuel |
title |
Short and Long-Term Controls on Active Layer and Permafrost Carbon Turnover Across the Arctic |
title_short |
Short and Long-Term Controls on Active Layer and Permafrost Carbon Turnover Across the Arctic |
title_full |
Short and Long-Term Controls on Active Layer and Permafrost Carbon Turnover Across the Arctic |
title_fullStr |
Short and Long-Term Controls on Active Layer and Permafrost Carbon Turnover Across the Arctic |
title_full_unstemmed |
Short and Long-Term Controls on Active Layer and Permafrost Carbon Turnover Across the Arctic |
title_sort |
short and long-term controls on active layer and permafrost carbon turnover across the arctic |
publisher |
Wiley |
publishDate |
2018 |
url |
https://lup.lub.lu.se/record/fb38887d-1e01-468f-84ef-d7a2b6dc62c1 https://doi.org/10.1002/2017JG004069 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_source |
Journal of Geophysical Research - Biogeosciences; 123(2), pp 372-390 (2018) ISSN: 2169-8953 |
op_relation |
https://lup.lub.lu.se/record/fb38887d-1e01-468f-84ef-d7a2b6dc62c1 http://dx.doi.org/10.1002/2017JG004069 scopus:85042108000 |
op_doi |
https://doi.org/10.1002/2017JG004069 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
123 |
container_issue |
2 |
container_start_page |
372 |
op_container_end_page |
390 |
_version_ |
1766322220356861952 |