气候变化领域集成服务门户(CCPortal): Diatom-based inferences of environmental changes from an alpine lake on the southeast edge of the Tibetan plateau over the last 4000 years

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DOI	10.3389/feart.2024.1324724
	Diatom-based inferences of environmental changes from an alpine lake on the southeast edge of the Tibetan plateau over the last 4000 years
	Zhang, Yunxia; Peng, Wei; Li, Yanling; Xiao, Xiayun; Hillman, Aubrey
发表日期	2024
EISSN	2296-6463
起始页码	12
卷号	12
英文摘要	To better understand how global and regional-scale climate has changed, high-resolution records for environmental changes are still needed in southwestern (SW) China during the Late Holocene epoch. This study presents a well-dated high-resolution diatom analysis from a 1.66-m-long sediment core taken from Lake Cuogeda (CGD) on the southeast (SE) edge of the Tibetan Plateau to document environmental changes over the past similar to 4000 years. Diatom and other geochemical proxies show that, from 3850 to 3430 cal yr BP (before present, 0 BP=1950 AD, 1900 to 1480 BC), the environment of Lake CGD is acidic, oligotrophic, and enriched with humic acids. And the lake ice cover duration is short during this period. During 3430-1550 cal yr BP (1480 BC-400 AD), Lake CGD has less humic acid and a relatively high pH environment. The ice cover duration is longer, and the temperature drops during this period. Our multi-indicator recorded two environment fluctuations at similar to 2800 cal yr BP (850 BC) and 2210-1950 cal yr BP (260 BC-0 AD). From 1550 to 3.6 cal yr BP (400-1946 AD), the lake ecosystem changed to a higher pH condition and had a prolonged freezing time. From 3.6 cal yr BP (1946 AD) to the present, Lake CGD's water was acidic, with an environment of shorter duration of ice cover and stronger lake water turbulence. Comparisons between the CGD records and other climate reconstructions underscore the relevance of the CGD record for regional and global environments. Comparisons indicate that the environment evolution pattern of SW China during the Late Holocene was greatly affected by solar radiation and North Atlantic sea surface temperature.
英文关键词	late holocene; climate change; diatoms; southwest China; southeast Tibetan plateau
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001165603600001
来源期刊	FRONTIERS IN EARTH SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302038
作者单位	Yuxi Normal University; Yunnan University; Chinese Academy of Sciences; Nanjing Institute of Geography & Limnology, CAS; State University of New York (SUNY) System; State University of New York (SUNY) Albany
推荐引用方式 GB/T 7714	Zhang, Yunxia,Peng, Wei,Li, Yanling,et al. Diatom-based inferences of environmental changes from an alpine lake on the southeast edge of the Tibetan plateau over the last 4000 years[J],2024,12.
APA	Zhang, Yunxia,Peng, Wei,Li, Yanling,Xiao, Xiayun,&Hillman, Aubrey.(2024).Diatom-based inferences of environmental changes from an alpine lake on the southeast edge of the Tibetan plateau over the last 4000 years.FRONTIERS IN EARTH SCIENCE,12.
MLA	Zhang, Yunxia,et al."Diatom-based inferences of environmental changes from an alpine lake on the southeast edge of the Tibetan plateau over the last 4000 years".FRONTIERS IN EARTH SCIENCE 12(2024).