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DOI	10.1016/j.accre.2021.11.007
	CH4 and CO2 observations from a melting high mountain glacier, Laohugou Glacier No. 12
	Du Z.-H.; Wang L.; Wei Z.-Q.; Liu J.-F.; Lin P.-L.; Lin J.-H.; Li Y.-Z.; Jin Z.-Z.; Chen J.-Z.; Wang X.-X.; Qin X.; Xiao C.-D.
发表日期	2022
ISSN	1674-9278
卷号	13 期号:1
英文摘要	With global warming, glaciers in the high mountains of China are retreating rapidly. However, few data have been reported on whether greenhouse gases from these glaciers are released into the atmosphere or absorbed by glacial meltwater. In this study, we collected meltwater and ice samples from Laohugou Glacier No. 12 in western China and measured CH4 and CO2 concentrations. Meltwater from the glacier terminus was continually sampled between 3 and 5 August 2020 to measure CH4 and CO2 concentrations. The results demonstrated that meltwater is a source of CH4 because the average saturations are over 100%. It could be concluded that CH4 in the atmosphere can be released by glacial meltwater. However, the CO2 saturations are various, and CO2 fluxes exhibit positive (released CO2) or negative (absorbed CO2) values because the water and atmospheric conditions are variable. More importantly, the CH4 and CO2 concentrations were higher in meltwater samples from the glacier terminus than in samples from the surface ice (including an ice core) and a surface stream. Although the meltwater effect from the upper part of the glacier cannot be excluded, we speculated that subglacial drainage systems with an anaerobic environment may represent the CH4 source, but it needs to be further investigated in the future. However, high mountain glaciers are currently ignored in global carbon budgets, and the increased melting of glaciers with global warming may accelerate the absorption of much more CO2 and lead to the release of CH4. © 2021 The Authors
英文关键词	CH4; CO2; Laohugou glacier No. 12; Source and sink; Subglacial drainage systems
语种	英语
来源期刊	Advances in Climate Change Research
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251222
作者单位	State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100875, China; Zhuhai Branch of State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Zhuhai, 519087, China; College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730000, China; Qilian Shan Station of Glaciology and Ecological Environment, State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
推荐引用方式 GB/T 7714	Du Z.-H.,Wang L.,Wei Z.-Q.,et al. CH4 and CO2 observations from a melting high mountain glacier, Laohugou Glacier No. 12[J]. 中国科学院西北生态环境资源研究院,2022,13(1).
APA	Du Z.-H..,Wang L..,Wei Z.-Q..,Liu J.-F..,Lin P.-L..,...&Xiao C.-D..(2022).CH4 and CO2 observations from a melting high mountain glacier, Laohugou Glacier No. 12.Advances in Climate Change Research,13(1).
MLA	Du Z.-H.,et al."CH4 and CO2 observations from a melting high mountain glacier, Laohugou Glacier No. 12".Advances in Climate Change Research 13.1(2022).