Annual ecosystem respiration is resistant to changes in freeze–thaw periods in semi-arid permafrost
International audience 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 CO2 to the atmosphere through ecosystem respiration (Re) under future climate scenarios. However, the...
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Online Access: | https://hal.archives-ouvertes.fr/hal-03227860 https://doi.org/10.1111/gcb.14979 |
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ftunivnantes:oai:HAL:hal-03227860v1 2023-05-15T16:37:23+02:00 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, Shilonog 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 Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) National Natural Science Foundation of China, NSFC: 41731175, 41988101 Chinese Academy of Sciences, CAS: XDA20050101, XDA2005010405 National Key Research and Development Program of China, NKRDPC: 2016YFC0501802, 31672470 This work was supported by projects from the National Natural Science Foundation of China (41731175 and 41988101), Strategic Priority Research Program A of the Chinese Academy of Sciences (XDA20050101 and XDA2005010405), National Key Research and Development Program of China (2016YFC0501802) and National Natural Science Foundation of China (31672470). 2020 https://hal.archives-ouvertes.fr/hal-03227860 https://doi.org/10.1111/gcb.14979 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/gcb.14979 hal-03227860 https://hal.archives-ouvertes.fr/hal-03227860 doi:10.1111/gcb.14979 ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.archives-ouvertes.fr/hal-03227860 Global Change Biology, Wiley, 2020, 26 (4), pp.2630-2641. ⟨10.1111/gcb.14979⟩ ecosystem respiration freeze–thaw events number and frequency of freeze–thaw cycles precipitation addition semi-arid with ice-poor permafrost Tibetan Plateau warming gradient [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2020 ftunivnantes https://doi.org/10.1111/gcb.14979 2022-10-18T23:32:02Z International audience 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 CO2 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 Ice permafrost Université de Nantes: HAL-UNIV-NANTES Global Change Biology 26 4 2630 2641 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
ecosystem respiration freeze–thaw events number and frequency of freeze–thaw cycles precipitation addition semi-arid with ice-poor permafrost Tibetan Plateau warming gradient [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
ecosystem respiration freeze–thaw events number and frequency of freeze–thaw cycles precipitation addition semi-arid with ice-poor permafrost Tibetan Plateau warming gradient [SDE.MCG]Environmental Sciences/Global Changes Wang, Qi Lv, Wangwang Li, Bowen Zhou, Yang Jiang, Lili Piao, Shilonog 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 |
topic_facet |
ecosystem respiration freeze–thaw events number and frequency of freeze–thaw cycles precipitation addition semi-arid with ice-poor permafrost Tibetan Plateau warming gradient [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience 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 CO2 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 |
Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) National Natural Science Foundation of China, NSFC: 41731175, 41988101 Chinese Academy of Sciences, CAS: XDA20050101, XDA2005010405 National Key Research and Development Program of China, NKRDPC: 2016YFC0501802, 31672470 This work was supported by projects from the National Natural Science Foundation of China (41731175 and 41988101), Strategic Priority Research Program A of the Chinese Academy of Sciences (XDA20050101 and XDA2005010405), National Key Research and Development Program of China (2016YFC0501802) and National Natural Science Foundation of China (31672470). |
format |
Article in Journal/Newspaper |
author |
Wang, Qi Lv, Wangwang Li, Bowen Zhou, Yang Jiang, Lili Piao, Shilonog 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_facet |
Wang, Qi Lv, Wangwang Li, Bowen Zhou, Yang Jiang, Lili Piao, Shilonog 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 |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-03227860 https://doi.org/10.1111/gcb.14979 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.archives-ouvertes.fr/hal-03227860 Global Change Biology, Wiley, 2020, 26 (4), pp.2630-2641. ⟨10.1111/gcb.14979⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/gcb.14979 hal-03227860 https://hal.archives-ouvertes.fr/hal-03227860 doi:10.1111/gcb.14979 |
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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1766027672207491072 |