气候变化领域集成服务门户(CCPortal): Holocene Lake Evolution and Glacial Fluctuations Indicated by Carbonate Minerals and Their Isotopic Compositions in the Sediments of a Glacial Melt Recharge Lake on the Northwestern Tibetan Plateau

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DOI	10.3389/feart.2021.656281
	Holocene Lake Evolution and Glacial Fluctuations Indicated by Carbonate Minerals and Their Isotopic Compositions in the Sediments of a Glacial Melt Recharge Lake on the Northwestern Tibetan Plateau
	Li, Minghui; Zhu, Liping; Wang, Junbo; Ju, Jianting; Liu, Chong; Ma, Qingfeng; Xu, Teng; Qiao, Baojin; Wang, Xiaoxiao
通讯作者	Zhu, LP (通讯作者)
发表日期	2021
EISSN	2296-6463
卷号	9
英文摘要	Lakes and glaciers are widely distributed on the Tibetan Plateau and are linked via hydrological processes. They are experiencing rapid changes due to global warming, but their relationships during the Holocene are less well known due to limited coupled geological records. Here, we analyzed the delta C-13(-VPDB) and delta O-18(-VPDB) values and ion content of calcite and aragonite in a 407-cm-long sediment core from Guozha Co, a closed basin on the northwestern Tibetan Plateau supplied by glacial meltwater, in order to understand how the lake responded to glacier changes during the Holocene. Our results indicate that the glacial meltwater lowered the lake's temperature and the delta O-18(lake water) and delta O-18(endogenic + authigenic carbonate) values and diluted the ion concentrations in the lake water. Three stages of evolution, 8.7-4.0, 4.0-1.5, and 1.5 kyr BP to present, are distinguished based on the decrease in glacial meltwater recharge. Guozha Co has been a closed basin since at least 8.7 kyr BP, and it has changed from a fresh water lake during 8.7-1.5 kyr BP to a brackish lake from 1.5 kyr BP to present due to several climate events. The famous 4.2 kyr BP cold event was identified in the core at 4.0 kyr BP, while warm events occurred at 6.2, 3.9, 2.2, 0.9, and 0.4 kyr BP. Both glaciers and lakes in this area are controlled by climate, but they exhibit opposite changes, that is, glaciers retreat and lakes expand, and vice versa. Our results provide an accurate interpretation of the cold events based on carbonate minerals and carbon-oxygen isotopes in glacial meltwater-recharged lake sediments.
关键词	BASIN WESTERN TIBET SUMMER MONSOON NAM CO ENVIRONMENTAL-CHANGES ICE CORE STABLE-ISOTOPES CLIMATE-CHANGE LEVEL CHANGES OXYGEN DELTA-O-18
英文关键词	carbonate minerals; oxygen and carbon isotopes; lake water temperature; glacial fluctuations; climatic events
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000662910700001
来源期刊	FRONTIERS IN EARTH SCIENCE
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/260256
推荐引用方式 GB/T 7714	Li, Minghui,Zhu, Liping,Wang, Junbo,et al. Holocene Lake Evolution and Glacial Fluctuations Indicated by Carbonate Minerals and Their Isotopic Compositions in the Sediments of a Glacial Melt Recharge Lake on the Northwestern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,9.
APA	Li, Minghui.,Zhu, Liping.,Wang, Junbo.,Ju, Jianting.,Liu, Chong.,...&Wang, Xiaoxiao.(2021).Holocene Lake Evolution and Glacial Fluctuations Indicated by Carbonate Minerals and Their Isotopic Compositions in the Sediments of a Glacial Melt Recharge Lake on the Northwestern Tibetan Plateau.FRONTIERS IN EARTH SCIENCE,9.
MLA	Li, Minghui,et al."Holocene Lake Evolution and Glacial Fluctuations Indicated by Carbonate Minerals and Their Isotopic Compositions in the Sediments of a Glacial Melt Recharge Lake on the Northwestern Tibetan Plateau".FRONTIERS IN EARTH SCIENCE 9(2021).