Predicting long‐term carbon mineralization and trace gas production from thawing permafrost of Northeast Siberia
Abstract The currently observed A rctic warming will increase permafrost degradation followed by mineralization of formerly frozen organic matter to carbon dioxide ( CO 2 ) and methane ( CH 4 ). Despite increasing awareness of permafrost carbon vulnerability, the potential long‐term formation of tra...
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crwiley:10.1111/gcb.12116 2024-06-23T07:56:02+00:00 Predicting long‐term carbon mineralization and trace gas production from thawing permafrost of Northeast Siberia Knoblauch, Christian Beer, Christian Sosnin, Alexander Wagner, Dirk Pfeiffer, Eva‐Maria 2013 http://dx.doi.org/10.1111/gcb.12116 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.12116 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.12116 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 19, issue 4, page 1160-1172 ISSN 1354-1013 1365-2486 journal-article 2013 crwiley https://doi.org/10.1111/gcb.12116 2024-06-13T04:20:05Z Abstract The currently observed A rctic warming will increase permafrost degradation followed by mineralization of formerly frozen organic matter to carbon dioxide ( CO 2 ) and methane ( CH 4 ). Despite increasing awareness of permafrost carbon vulnerability, the potential long‐term formation of trace gases from thawing permafrost remains unclear. The objective of the current study is to quantify the potential long‐term release of trace gases from permafrost organic matter. Therefore, H olocene and P leistocene permafrost deposits were sampled in the L ena R iver D elta, N ortheast S iberia. The sampled permafrost contained between 0.6% and 12.4% organic carbon. CO 2 and CH 4 production was measured for 1200 days in aerobic and anaerobic incubations at 4 °C. The derived fluxes were used to estimate parameters of a two pool carbon degradation model. Total CO 2 production was similar in Holocene permafrost (1.3 ± 0.8 mg CO 2 ‐C gdw −1 aerobically, 0.25 ± 0.13 mg CO 2 ‐C gdw −1 anaerobically) as in 34 000–42 000‐year‐old P leistocene permafrost (1.6 ± 1.2 mg CO 2 ‐C gdw −1 aerobically, 0.26 ± 0.10 mg CO 2 ‐C gdw −1 anaerobically). The main predictor for carbon mineralization was the content of organic matter. Anaerobic conditions strongly reduced carbon mineralization since only 25% of aerobically mineralized carbon was released as CO 2 and CH 4 in the absence of oxygen. CH 4 production was low or absent in most of the P leistocene permafrost and always started after a significant delay. After 1200 days on average 3.1% of initial carbon was mineralized to CO 2 under aerobic conditions while without oxygen 0.55% were released as CO 2 and 0.28% as CH 4 . The calibrated carbon degradation model predicted cumulative CO 2 production over a period of 100 years accounting for 15.1% (aerobic) and 1.8% (anaerobic) of initial organic carbon, which is significantly less than recent estimates. The multiyear time series from the incubation experiments helps to more reliably constrain projections of future trace gas fluxes from ... Article in Journal/Newspaper permafrost Siberia Wiley Online Library Global Change Biology 19 4 1160 1172 |
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English |
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Abstract The currently observed A rctic warming will increase permafrost degradation followed by mineralization of formerly frozen organic matter to carbon dioxide ( CO 2 ) and methane ( CH 4 ). Despite increasing awareness of permafrost carbon vulnerability, the potential long‐term formation of trace gases from thawing permafrost remains unclear. The objective of the current study is to quantify the potential long‐term release of trace gases from permafrost organic matter. Therefore, H olocene and P leistocene permafrost deposits were sampled in the L ena R iver D elta, N ortheast S iberia. The sampled permafrost contained between 0.6% and 12.4% organic carbon. CO 2 and CH 4 production was measured for 1200 days in aerobic and anaerobic incubations at 4 °C. The derived fluxes were used to estimate parameters of a two pool carbon degradation model. Total CO 2 production was similar in Holocene permafrost (1.3 ± 0.8 mg CO 2 ‐C gdw −1 aerobically, 0.25 ± 0.13 mg CO 2 ‐C gdw −1 anaerobically) as in 34 000–42 000‐year‐old P leistocene permafrost (1.6 ± 1.2 mg CO 2 ‐C gdw −1 aerobically, 0.26 ± 0.10 mg CO 2 ‐C gdw −1 anaerobically). The main predictor for carbon mineralization was the content of organic matter. Anaerobic conditions strongly reduced carbon mineralization since only 25% of aerobically mineralized carbon was released as CO 2 and CH 4 in the absence of oxygen. CH 4 production was low or absent in most of the P leistocene permafrost and always started after a significant delay. After 1200 days on average 3.1% of initial carbon was mineralized to CO 2 under aerobic conditions while without oxygen 0.55% were released as CO 2 and 0.28% as CH 4 . The calibrated carbon degradation model predicted cumulative CO 2 production over a period of 100 years accounting for 15.1% (aerobic) and 1.8% (anaerobic) of initial organic carbon, which is significantly less than recent estimates. The multiyear time series from the incubation experiments helps to more reliably constrain projections of future trace gas fluxes from ... |
format |
Article in Journal/Newspaper |
author |
Knoblauch, Christian Beer, Christian Sosnin, Alexander Wagner, Dirk Pfeiffer, Eva‐Maria |
spellingShingle |
Knoblauch, Christian Beer, Christian Sosnin, Alexander Wagner, Dirk Pfeiffer, Eva‐Maria Predicting long‐term carbon mineralization and trace gas production from thawing permafrost of Northeast Siberia |
author_facet |
Knoblauch, Christian Beer, Christian Sosnin, Alexander Wagner, Dirk Pfeiffer, Eva‐Maria |
author_sort |
Knoblauch, Christian |
title |
Predicting long‐term carbon mineralization and trace gas production from thawing permafrost of Northeast Siberia |
title_short |
Predicting long‐term carbon mineralization and trace gas production from thawing permafrost of Northeast Siberia |
title_full |
Predicting long‐term carbon mineralization and trace gas production from thawing permafrost of Northeast Siberia |
title_fullStr |
Predicting long‐term carbon mineralization and trace gas production from thawing permafrost of Northeast Siberia |
title_full_unstemmed |
Predicting long‐term carbon mineralization and trace gas production from thawing permafrost of Northeast Siberia |
title_sort |
predicting long‐term carbon mineralization and trace gas production from thawing permafrost of northeast siberia |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1111/gcb.12116 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.12116 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.12116 |
genre |
permafrost Siberia |
genre_facet |
permafrost Siberia |
op_source |
Global Change Biology volume 19, issue 4, page 1160-1172 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.12116 |
container_title |
Global Change Biology |
container_volume |
19 |
container_issue |
4 |
container_start_page |
1160 |
op_container_end_page |
1172 |
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1802648891936473088 |