Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau

doi:10.1021/acs.est.7b04979

	Changes in Methane Flux along a Permafrost Thaw Sequence on the Tibetan Plateau
	Yang, Guibiao 1; Peng, Yunfeng ; Olefeld, David 2; Chen, Yongliang ; Wang, Guanqin 1; Li, Fei 1; Zhang, Dianye 1; Wang, Jun 1; Yu, Jianchun 1; Liu, Li 1; Qin, Shuqi 1; Sun, Tianyang 1; Yang, Yuanhe1
	2018
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
卷号	52 期号:3 页码:1244-1252
摘要	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.
学科领域	Engineering, Environmental ; Environmental Sciences
DOI	10.1021/acs.est.7b04979
收录类别	SCI
语种	英语
WOS关键词	MICROBIAL ACTIVITY ; CARBON ; SOIL ; EMISSIONS ; CH4 ; FOREST ; RESPIRATION ; COLLAPSE ; PROPOSAL ; STOCKS
WOS记录号	WOS:000424851700036
出版者	AMER CHEMICAL SOC
文献子类	Article
出版地	WASHINGTON
EISSN	1520-5851
资助机构	National 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
作者邮箱	yhyang@ibcas.ac.cn
引用统计	被引频次：50[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/20697
专题	植被与环境变化国家重点实验室
作者单位	1.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
推荐引用方式 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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