Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau
Permafrost thaw alters the physical and environmental conditions of soil and may thus cause a positive feedback to climate warming through increased methane emissions. However, the current knowledge of methane emissions following thermokarst development is primarily based on expanding lakes and wetl...
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AMER CHEMICAL SOC
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Online Access: | http://ir.ibcas.ac.cn/handle/2S10CLM1/20697 https://doi.org/10.1021/acs.est.7b04979 |
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ftchiacadscibcas:oai:ir.ibcas.ac.cn:2S10CLM1/20697 2023-05-15T17:57:24+02:00 Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau Yang, Guibiao Peng, Yunfeng Olefeld, David Chen, Yongliang Wang, Guanqin Li, Fei Zhang, Dianye Wang, Jun Yu, Jianchun Liu, Li Qin, Shuqi Sun, Tianyang Yang, Yuanhe 2018 http://ir.ibcas.ac.cn/handle/2S10CLM1/20697 https://doi.org/10.1021/acs.est.7b04979 英语 eng AMER CHEMICAL SOC ENVIRONMENTAL SCIENCE & TECHNOLOGY http://ir.ibcas.ac.cn/handle/2S10CLM1/20697 doi:10.1021/acs.est.7b04979 cn.org.cspace.api.content.CopyrightPolicy@1a459cfb Engineering Environmental Environmental Sciences MICROBIAL ACTIVITY CARBON SOIL EMISSIONS CH4 FOREST RESPIRATION COLLAPSE PROPOSAL STOCKS Article 期刊论文 2018 ftchiacadscibcas https://doi.org/10.1021/acs.est.7b04979 2022-06-12T18:14:06Z Permafrost thaw alters the physical and environmental conditions of soil and may thus cause a positive feedback to climate warming through increased methane emissions. However, the current knowledge of methane emissions following thermokarst development is primarily based on expanding lakes and wetlands, with upland thermokarst being studied less often. In this study, we monitored the methane emissions during the peak growing seasons of two consecutive years along a thaw sequence within a thermo-erosion gully in a Tibetan swamp meadow. Both years had consistent results, with the early and midthaw stages (3 to 12 years since thaw) exhibiting low methane emissions that were similar to those in the undisturbed meadow, while the emissions from the late thaw stage (20 years since thaw) were 3.5 times higher. Our results also showed that the soil water filled pore space, rather than the soil moisture per se, in combination with the sand content, were the main factors that caused increased methane emissions. These findings differ from the traditional view that upland thermokarst could reduce methane emissions owing to the improvement of drainage conditions, suggesting that upland thermokarst development does not always result in a decrease in methane emissions. Article in Journal/Newspaper permafrost Thermokarst Institute of Botany: IBCAS OpenIR (Chinese Academy Of Sciences) Environmental Science & Technology 52 3 1244 1252 |
institution |
Open Polar |
collection |
Institute of Botany: IBCAS OpenIR (Chinese Academy Of Sciences) |
op_collection_id |
ftchiacadscibcas |
language |
English |
topic |
Engineering Environmental Environmental Sciences MICROBIAL ACTIVITY CARBON SOIL EMISSIONS CH4 FOREST RESPIRATION COLLAPSE PROPOSAL STOCKS |
spellingShingle |
Engineering Environmental Environmental Sciences MICROBIAL ACTIVITY CARBON SOIL EMISSIONS CH4 FOREST RESPIRATION COLLAPSE PROPOSAL STOCKS Yang, Guibiao Peng, Yunfeng Olefeld, David Chen, Yongliang Wang, Guanqin Li, Fei Zhang, Dianye Wang, Jun Yu, Jianchun Liu, Li Qin, Shuqi Sun, Tianyang Yang, Yuanhe Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau |
topic_facet |
Engineering Environmental Environmental Sciences MICROBIAL ACTIVITY CARBON SOIL EMISSIONS CH4 FOREST RESPIRATION COLLAPSE PROPOSAL STOCKS |
description |
Permafrost thaw alters the physical and environmental conditions of soil and may thus cause a positive feedback to climate warming through increased methane emissions. However, the current knowledge of methane emissions following thermokarst development is primarily based on expanding lakes and wetlands, with upland thermokarst being studied less often. In this study, we monitored the methane emissions during the peak growing seasons of two consecutive years along a thaw sequence within a thermo-erosion gully in a Tibetan swamp meadow. Both years had consistent results, with the early and midthaw stages (3 to 12 years since thaw) exhibiting low methane emissions that were similar to those in the undisturbed meadow, while the emissions from the late thaw stage (20 years since thaw) were 3.5 times higher. Our results also showed that the soil water filled pore space, rather than the soil moisture per se, in combination with the sand content, were the main factors that caused increased methane emissions. These findings differ from the traditional view that upland thermokarst could reduce methane emissions owing to the improvement of drainage conditions, suggesting that upland thermokarst development does not always result in a decrease in methane emissions. |
format |
Article in Journal/Newspaper |
author |
Yang, Guibiao Peng, Yunfeng Olefeld, David Chen, Yongliang Wang, Guanqin Li, Fei Zhang, Dianye Wang, Jun Yu, Jianchun Liu, Li Qin, Shuqi Sun, Tianyang Yang, Yuanhe |
author_facet |
Yang, Guibiao Peng, Yunfeng Olefeld, David Chen, Yongliang Wang, Guanqin Li, Fei Zhang, Dianye Wang, Jun Yu, Jianchun Liu, Li Qin, Shuqi Sun, Tianyang Yang, Yuanhe |
author_sort |
Yang, Guibiao |
title |
Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau |
title_short |
Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau |
title_full |
Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau |
title_fullStr |
Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau |
title_full_unstemmed |
Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau |
title_sort |
changes in methane flux along a permafrost thaw sequence on the tibetan plateau |
publisher |
AMER CHEMICAL SOC |
publishDate |
2018 |
url |
http://ir.ibcas.ac.cn/handle/2S10CLM1/20697 https://doi.org/10.1021/acs.est.7b04979 |
genre |
permafrost Thermokarst |
genre_facet |
permafrost Thermokarst |
op_relation |
ENVIRONMENTAL SCIENCE & TECHNOLOGY http://ir.ibcas.ac.cn/handle/2S10CLM1/20697 doi:10.1021/acs.est.7b04979 |
op_rights |
cn.org.cspace.api.content.CopyrightPolicy@1a459cfb |
op_doi |
https://doi.org/10.1021/acs.est.7b04979 |
container_title |
Environmental Science & Technology |
container_volume |
52 |
container_issue |
3 |
container_start_page |
1244 |
op_container_end_page |
1252 |
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1766165829750095872 |