Substantial non‐growing season carbon dioxide loss across Tibetan alpine permafrost region
Abstract One of the major uncertainties for projecting permafrost carbon (C)‐climate feedback is a poor representation of the non‐growing season carbon dioxide (CO 2 ) emissions under a changing climate. Here, combining in situ field observations, regional synthesis and a random forest model, we ass...
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Online Access: | http://dx.doi.org/10.1111/gcb.16315 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16315 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.16315 |
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crwiley:10.1111/gcb.16315 2024-06-23T07:50:11+00:00 Substantial non‐growing season carbon dioxide loss across Tibetan alpine permafrost region Li, Qinlu Liu, Yang Kou, Dan Peng, Yunfeng Yang, Yuanhe Chinese Academy of Sciences National Natural Science Foundation of China Youth Innovation Promotion Association of the Chinese Academy of Sciences 2022 http://dx.doi.org/10.1111/gcb.16315 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16315 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.16315 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 28, issue 17, page 5200-5210 ISSN 1354-1013 1365-2486 journal-article 2022 crwiley https://doi.org/10.1111/gcb.16315 2024-06-04T06:48:27Z Abstract One of the major uncertainties for projecting permafrost carbon (C)‐climate feedback is a poor representation of the non‐growing season carbon dioxide (CO 2 ) emissions under a changing climate. Here, combining in situ field observations, regional synthesis and a random forest model, we assessed contemporary and future soil respired CO 2 (i.e., soil respiration, R s ) across the Tibetan alpine permafrost region, which has received much less attention compared with the Arctic permafrost domain. We estimated the regional mean R s of 229.8, 72.9 and 302.7 g C m −2 year −1 during growing season, non‐growing season and the entire year, respectively; corresponding to the contemporary losses of 296.9, 94.3 and 391.2 Tg C year −1 from this high‐altitude permafrost‐affected area. The non‐growing season R s accounted for a quarter of the annual soil CO 2 efflux. Different from the prevailing view that temperature is the most limiting factor for cold‐period CO 2 release in Arctic permafrost ecosystems, precipitation determined the spatial pattern of non‐growing season R s on the Tibetan Plateau. Using the key predictors, model extrapolation demonstrated additional losses of 38.8 and 74.5 Tg C from the non‐growing season for a moderate mitigation scenario and a business‐as‐usual emissions scenario, respectively. These results provide a baseline for non‐growing season CO 2 emissions from high‐altitude permafrost areas and help for accurate projection of permafrost C‐climate feedback. Article in Journal/Newspaper Arctic permafrost Wiley Online Library Arctic Global Change Biology 28 17 5200 5210 |
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Wiley Online Library |
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English |
description |
Abstract One of the major uncertainties for projecting permafrost carbon (C)‐climate feedback is a poor representation of the non‐growing season carbon dioxide (CO 2 ) emissions under a changing climate. Here, combining in situ field observations, regional synthesis and a random forest model, we assessed contemporary and future soil respired CO 2 (i.e., soil respiration, R s ) across the Tibetan alpine permafrost region, which has received much less attention compared with the Arctic permafrost domain. We estimated the regional mean R s of 229.8, 72.9 and 302.7 g C m −2 year −1 during growing season, non‐growing season and the entire year, respectively; corresponding to the contemporary losses of 296.9, 94.3 and 391.2 Tg C year −1 from this high‐altitude permafrost‐affected area. The non‐growing season R s accounted for a quarter of the annual soil CO 2 efflux. Different from the prevailing view that temperature is the most limiting factor for cold‐period CO 2 release in Arctic permafrost ecosystems, precipitation determined the spatial pattern of non‐growing season R s on the Tibetan Plateau. Using the key predictors, model extrapolation demonstrated additional losses of 38.8 and 74.5 Tg C from the non‐growing season for a moderate mitigation scenario and a business‐as‐usual emissions scenario, respectively. These results provide a baseline for non‐growing season CO 2 emissions from high‐altitude permafrost areas and help for accurate projection of permafrost C‐climate feedback. |
author2 |
Chinese Academy of Sciences National Natural Science Foundation of China Youth Innovation Promotion Association of the Chinese Academy of Sciences |
format |
Article in Journal/Newspaper |
author |
Li, Qinlu Liu, Yang Kou, Dan Peng, Yunfeng Yang, Yuanhe |
spellingShingle |
Li, Qinlu Liu, Yang Kou, Dan Peng, Yunfeng Yang, Yuanhe Substantial non‐growing season carbon dioxide loss across Tibetan alpine permafrost region |
author_facet |
Li, Qinlu Liu, Yang Kou, Dan Peng, Yunfeng Yang, Yuanhe |
author_sort |
Li, Qinlu |
title |
Substantial non‐growing season carbon dioxide loss across Tibetan alpine permafrost region |
title_short |
Substantial non‐growing season carbon dioxide loss across Tibetan alpine permafrost region |
title_full |
Substantial non‐growing season carbon dioxide loss across Tibetan alpine permafrost region |
title_fullStr |
Substantial non‐growing season carbon dioxide loss across Tibetan alpine permafrost region |
title_full_unstemmed |
Substantial non‐growing season carbon dioxide loss across Tibetan alpine permafrost region |
title_sort |
substantial non‐growing season carbon dioxide loss across tibetan alpine permafrost region |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/gcb.16315 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16315 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.16315 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost |
genre_facet |
Arctic permafrost |
op_source |
Global Change Biology volume 28, issue 17, page 5200-5210 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.16315 |
container_title |
Global Change Biology |
container_volume |
28 |
container_issue |
17 |
container_start_page |
5200 |
op_container_end_page |
5210 |
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1802641056479576064 |