Annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi‐arid permafrost
Abstract Warming in cold regions alters freezing and thawing (F–T) of soil in winter, exposing soil organic carbon to decomposition. Carbon‐rich permafrost is expected to release more CO 2 to the atmosphere through ecosystem respiration (Re) under future climate scenarios. However, the mechanisms of...
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Online Access: | http://dx.doi.org/10.1111/gcb.14979 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14979 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14979 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14979 |
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crwiley:10.1111/gcb.14979 2024-06-02T08:13:01+00:00 Annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi‐arid permafrost Wang, Qi Lv, Wangwang Li, Bowen Zhou, Yang Jiang, Lili Piao, Shilong Wang, Yanfen Zhang, Lirong Meng, Fandong Liu, Peipei Hong, Huan Li, Yaoming Dorji, Tsechoe Luo, Caiyun Zhang, Zhenhua Ciais, Philippe Peñuelas, Josep Kardol, Paul Zhou, Huakun Wang, Shiping National Natural Science Foundation of China Chinese Academy of Sciences 2020 http://dx.doi.org/10.1111/gcb.14979 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14979 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14979 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14979 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 26, issue 4, page 2630-2641 ISSN 1354-1013 1365-2486 journal-article 2020 crwiley https://doi.org/10.1111/gcb.14979 2024-05-03T10:44:26Z Abstract Warming in cold regions alters freezing and thawing (F–T) of soil in winter, exposing soil organic carbon to decomposition. Carbon‐rich permafrost is expected to release more CO 2 to the atmosphere through ecosystem respiration (Re) under future climate scenarios. However, the mechanisms of the responses of freeze – thaw periods to climate change and their coupling with Re in situ are poorly understood. Here, using 2 years of continuous data, we test how changes in F–T events relate to annual Re under four warming levels and precipitation addition in a semi‐arid grassland with discontinuous alpine permafrost. Warming shortened the entire F–T period because the frozen period shortened more than the extended freezing period. It decreased total Re during the F–T period mainly due to decrease in mean Re rate. However, warming did not alter annual Re because of reduced soil water content and the small contribution of total Re during the F–T period to annual Re. Although there were no effects of precipitation addition alone or interactions with warming on F–T events, precipitation addition increased total Re during the F–T period and the whole year. This decoupling between changes in soil freeze – thaw events and annual Re could result from their different driving factors. Our results suggest that annual Re could be mainly determined by soil water content rather than by change in freeze – thaw periods induced by warming in semi‐arid alpine permafrost. Article in Journal/Newspaper permafrost Wiley Online Library Global Change Biology 26 4 2630 2641 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Warming in cold regions alters freezing and thawing (F–T) of soil in winter, exposing soil organic carbon to decomposition. Carbon‐rich permafrost is expected to release more CO 2 to the atmosphere through ecosystem respiration (Re) under future climate scenarios. However, the mechanisms of the responses of freeze – thaw periods to climate change and their coupling with Re in situ are poorly understood. Here, using 2 years of continuous data, we test how changes in F–T events relate to annual Re under four warming levels and precipitation addition in a semi‐arid grassland with discontinuous alpine permafrost. Warming shortened the entire F–T period because the frozen period shortened more than the extended freezing period. It decreased total Re during the F–T period mainly due to decrease in mean Re rate. However, warming did not alter annual Re because of reduced soil water content and the small contribution of total Re during the F–T period to annual Re. Although there were no effects of precipitation addition alone or interactions with warming on F–T events, precipitation addition increased total Re during the F–T period and the whole year. This decoupling between changes in soil freeze – thaw events and annual Re could result from their different driving factors. Our results suggest that annual Re could be mainly determined by soil water content rather than by change in freeze – thaw periods induced by warming in semi‐arid alpine permafrost. |
author2 |
National Natural Science Foundation of China Chinese Academy of Sciences |
format |
Article in Journal/Newspaper |
author |
Wang, Qi Lv, Wangwang Li, Bowen Zhou, Yang Jiang, Lili Piao, Shilong Wang, Yanfen Zhang, Lirong Meng, Fandong Liu, Peipei Hong, Huan Li, Yaoming Dorji, Tsechoe Luo, Caiyun Zhang, Zhenhua Ciais, Philippe Peñuelas, Josep Kardol, Paul Zhou, Huakun Wang, Shiping |
spellingShingle |
Wang, Qi Lv, Wangwang Li, Bowen Zhou, Yang Jiang, Lili Piao, Shilong Wang, Yanfen Zhang, Lirong Meng, Fandong Liu, Peipei Hong, Huan Li, Yaoming Dorji, Tsechoe Luo, Caiyun Zhang, Zhenhua Ciais, Philippe Peñuelas, Josep Kardol, Paul Zhou, Huakun Wang, Shiping Annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi‐arid permafrost |
author_facet |
Wang, Qi Lv, Wangwang Li, Bowen Zhou, Yang Jiang, Lili Piao, Shilong Wang, Yanfen Zhang, Lirong Meng, Fandong Liu, Peipei Hong, Huan Li, Yaoming Dorji, Tsechoe Luo, Caiyun Zhang, Zhenhua Ciais, Philippe Peñuelas, Josep Kardol, Paul Zhou, Huakun Wang, Shiping |
author_sort |
Wang, Qi |
title |
Annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi‐arid permafrost |
title_short |
Annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi‐arid permafrost |
title_full |
Annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi‐arid permafrost |
title_fullStr |
Annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi‐arid permafrost |
title_full_unstemmed |
Annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi‐arid permafrost |
title_sort |
annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi‐arid permafrost |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/gcb.14979 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14979 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14979 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14979 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Global Change Biology volume 26, issue 4, page 2630-2641 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.14979 |
container_title |
Global Change Biology |
container_volume |
26 |
container_issue |
4 |
container_start_page |
2630 |
op_container_end_page |
2641 |
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1800759654481920000 |