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

doi:10.1021/acs.est.7b04979

CORC > 植物研究所 > 中国科学院植物研究所 > 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, Guibiao 3; Peng, Yunfeng ; Olefeld, David 2; Chen, Yongliang ; Wang, Guanqin 3; Li, Fei 3; Zhang, Dianye 3; Wang, Jun 3; Yu, Jianchun 3; Liu, Li 3
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2018
卷号	52 期号:3 页码:1244-1252
ISSN号	0013-936X
DOI	10.1021/acs.est.7b04979
文献子类	Article
英文摘要	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.
学科主题	Engineering, Environmental ; Environmental Sciences
电子版国际标准刊号	1520-5851
出版地	WASHINGTON
WOS关键词	MICROBIAL ACTIVITY ; CARBON ; SOIL ; EMISSIONS ; CH4 ; FOREST ; RESPIRATION ; COLLAPSE ; PROPOSAL ; STOCKS
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000424851700036
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
内容类型	期刊论文
源URL	[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.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2H1, Canada 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
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.