IB-CAS  > 植被与环境变化国家重点实验室
Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau
Yang, Guibiao1; Peng, Yunfeng; Olefeld, David2; Chen, Yongliang; Wang, Guanqin1; Li, Fei1; Zhang, Dianye1; Wang, Jun1; Yu, Jianchun1; Liu, Li1; Qin, Shuqi1; Sun, Tianyang1; Yang, Yuanhe1
2018
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume52Issue:3Pages:1244-1252
AbstractPermafrost 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.
Subject AreaEngineering, Environmental ; Environmental Sciences
DOI10.1021/acs.est.7b04979
Indexed BySCI
Language英语
WOS KeywordMICROBIAL ACTIVITY ; CARBON ; SOIL ; EMISSIONS ; CH4 ; FOREST ; RESPIRATION ; COLLAPSE ; PROPOSAL ; STOCKS
WOS IDWOS:000424851700036
PublisherAMER CHEMICAL SOC
SubtypeArticle
Publication PlaceWASHINGTON
EISSN1520-5851
Funding OrganizationNational Basic Research Program of China on Global ChangeNational Basic Research Program of China [2014CB954001] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670482] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSW-SMC049] ; Chinese Academy of Sciences-Peking University Pioneer Cooperation Team ; Thousand Young Talents ProgramChinese Academy of Sciences
Corresponding Author Emailyhyang@ibcas.ac.cn
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Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/20697
Collection植被与环境变化国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2H1, Canada
Recommended Citation
GB/T 7714
Yang, Guibiao,Peng, Yunfeng,Olefeld, David,et al. Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2018,52(3):1244-1252.
APA Yang, Guibiao.,Peng, Yunfeng.,Olefeld, David.,Chen, Yongliang.,Wang, Guanqin.,...&Yang, Yuanhe.(2018).Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau.ENVIRONMENTAL SCIENCE & TECHNOLOGY,52(3),1244-1252.
MLA Yang, Guibiao,et al."Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau".ENVIRONMENTAL SCIENCE & TECHNOLOGY 52.3(2018):1244-1252.
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