气候变化领域集成服务门户(CCPortal): Decadal shifts in Qingzang Plateau lake carbon dynamics (1970-2020): From predominant carbon sources to emerging sinks

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DOI	10.1016/j.ese.2024.100389
	Decadal shifts in Qingzang Plateau lake carbon dynamics (1970-2020): From predominant carbon sources to emerging sinks
	Shen, Di; Li, Yu; Wang, Yafeng; Huo, Shouliang; Liu, Yong; Jia, Junjie; Wang, Shuoyue; Sun, Kun; Gao, Yang
发表日期	2024
ISSN	2666-4984
起始页码	21
卷号	21
英文摘要	The evasion of carbon dioxide (CO2) from lakes significantly influences the global carbon equilibrium. Amidst global climatic transformations, the role of Qingzang Plateau (QZP) lakes as carbon (C) sources or sinks remains a subject of debate. Furthermore, accurately quantifying their contribution to the global carbon budget presents a formidable challenge. Here, spanning half a century (1970-2020), we utilize a synthesis of literature and empirical field data to assess the CO2 exchange flux of QZP lakes. We find markedly higher CO2 exchange flux in the southeast lakes than that in the northern and western regions from 1970 to 2000. During this time, both freshwater and saltwater lakes served primarily as carbon sources. The annual CO2 exchange flux was estimated at 2.04 +/- 0.37 Tg (Tg) C yr-1, mainly influenced by temperature fluctuations. The CO2 exchange flux patterns underwent a geographical inversion between 2000 and 2020, with increased levels in the west and decreased levels in the east. Notably, CO2 emissions from freshwater lakes diminished, and certain saltwater lakes in the QTP transitioned from carbon sources to sinks. From 2000 to 2020, the annual CO2 exchange flux from QZP lakes is estimated at 1.34 +/- 0.50 Tg C yr-1, with solar radiation playing a more pronounced role in carbon emissions. Cumulatively, over the past five decades, QZP lakes have generally functioned as carbon sources. Nevertheless, the total annual CO2 emissions have declined since the year 2000, indicating a potential shift trend from being a carbon source to a sink, mirroring broader patterns of global climate change. These findings not only augment our understanding of the carbon cycle in plateau aquatic systems but also provide crucial data for refining China's carbon budget. (c) 2024 The Authors. Published by Elsevier B.V. on behalf of Chinese Society for Environmental Sciences, Harbin Institute of Technology, Chinese Research Academy of Environmental Sciences. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
英文关键词	Carbon source; Carbon sink; Carbon exchange flux; Qingzang Plateau; Global climate change
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences
WOS记录号	WOS:001164776600001
来源期刊	ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
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/290998
作者单位	Lanzhou University; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Chinese Research Academy of Environmental Sciences; Peking University; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Shen, Di,Li, Yu,Wang, Yafeng,et al. Decadal shifts in Qingzang Plateau lake carbon dynamics (1970-2020): From predominant carbon sources to emerging sinks[J]. 中国科学院青藏高原研究所,2024,21.
APA	Shen, Di.,Li, Yu.,Wang, Yafeng.,Huo, Shouliang.,Liu, Yong.,...&Gao, Yang.(2024).Decadal shifts in Qingzang Plateau lake carbon dynamics (1970-2020): From predominant carbon sources to emerging sinks.ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY,21.
MLA	Shen, Di,et al."Decadal shifts in Qingzang Plateau lake carbon dynamics (1970-2020): From predominant carbon sources to emerging sinks".ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 21(2024).