气候变化领域集成服务门户(CCPortal): High carbon emissions from thermokarst lakes and their determinants in the Tibet Plateau

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DOI	10.1111/gcb.16658
	High carbon emissions from thermokarst lakes and their determinants in the Tibet Plateau
	Mu, Cuicui; Mu, Mei; Wu, Xiaodong; Jia, Lin; Fan, Chenyan; Peng, Xiaoqing; Ping, Chien-Lu; Wu, Qingbai; Xiao, Cunde; Liu, Jianbao
发表日期	2023
ISSN	1354-1013
EISSN	1365-2486
起始页码	2732
结束页码	2745
卷号	29 期号:10
英文摘要	Thermokarst lakes are potentially important sources of methane (CH4) and carbon dioxide (CO2). However, considerable uncertainty exists regarding carbon emissions from thermokarst lakes owing to a limited understanding of their patterns and motivators. In this study, we measured CH4 and CO2 diffusive fluxes in 163 thermokarst lakes in the Qinghai-Tibet Plateau (QTP) over 3 years from May to October. The median carbon emissions from the QTP thermokarst lakes were 1440 mg CO2 m(-2) day(-1) and 60 mg CH4 m(-2) day(-1), respectively. The diffusive rates of CO2 and CH4 are related to the catchment land cover type. Sediment microbial abundance and hydrochemistry explain 51.9% and 38.3% of the total variance in CH4 diffusive emissions, respectively, while CO2 emissions show no significant relationship with environmental factors. When upscaling carbon emissions from the QTP thermokarst lakes, the annual average CH4 release per lake area is equal to that of the pan-Arctic region. Our findings highlight the importance of incorporating in situ observation data with different emission pathways for different land cover types in predicting carbon emissions from thermokarst lakes in the future.
关键词	carbon cycle climate warming methane emission permafrost thermokarst lakes Tibet Plateau
英文关键词	DISSOLVED ORGANIC-CARBON; METHANE EBULLITION; DIOXIDE EMISSIONS; PERMAFROST THAW; WIND-SPEED; LAND-COVER; WATER; CH4; CO2; EXCHANGE
WOS研究方向	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:000948488000001
来源期刊	GLOBAL CHANGE BIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282637
作者单位	Lanzhou University; Chinese Academy of Sciences; Southern Marine Science & Engineering Guangdong Laboratory; University of Alaska System; University of Alaska Fairbanks; Chinese Academy of Sciences; Chinese Academy of Sciences; Beijing Normal University; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Mu, Cuicui,Mu, Mei,Wu, Xiaodong,et al. High carbon emissions from thermokarst lakes and their determinants in the Tibet Plateau[J]. 中国科学院青藏高原研究所,2023,29(10).
APA	Mu, Cuicui.,Mu, Mei.,Wu, Xiaodong.,Jia, Lin.,Fan, Chenyan.,...&Liu, Jianbao.(2023).High carbon emissions from thermokarst lakes and their determinants in the Tibet Plateau.GLOBAL CHANGE BIOLOGY,29(10).
MLA	Mu, Cuicui,et al."High carbon emissions from thermokarst lakes and their determinants in the Tibet Plateau".GLOBAL CHANGE BIOLOGY 29.10(2023).