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

文献类型：期刊论文

作者Yang, Guibiao3; Peng, Yunfeng; Olefeld, David1; Chen, Yongliang; Wang, Guanqin3; Li, Fei3; Zhang, Dianye3; Wang, Jun3; Yu, Jianchun3; Liu, Li3
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期2018
卷号52期号:3页码:1244-1252
ISSN号0013-936X
DOI10.1021/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
出版地WASHINGTON
电子版国际标准刊号1520-5851
WOS关键词MICROBIAL ACTIVITY ; CARBON ; SOIL ; EMISSIONS ; CH4 ; FOREST ; RESPIRATION ; COLLAPSE ; PROPOSAL ; STOCKS
语种英语
WOS记录号WOS:000424851700036
出版者AMER CHEMICAL SOC
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
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 Chinese Acad Sci, Beijing 100049, Peoples R China
2.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2H1, Canada
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.

入库方式： OAI收割

来源：植物研究所

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