气候变化领域集成服务门户(CCPortal): Climatic and environmental change in the western Tibetan Plateau during the Holocene, recorded by lake sediments from Aweng Co

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DOI	10.1016/j.quascirev.2021.106889
	Climatic and environmental change in the western Tibetan Plateau during the Holocene, recorded by lake sediments from Aweng Co
	Zhang, Yuzhi; Zhang, Jiawu; McGowan, Suzanne; Metcalfe, Sarah; Jones, Matthew; Leng, Melanie J.; Hou, Juzhi
通讯作者	Zhang, JW (通讯作者)
发表日期	2021
ISSN	0277-3791
EISSN	1873-457X
卷号	259
英文摘要	Understanding the strength and extent of the Asian summer monsoon (including the East Asian summer monsoon and the Indian summer monsoon) in the Tibetan Plateau (TP) region is crucial for predicting possible changes in the regional eco-environment and water resources under global warming. Due to the lack of well-dated and high-resolution paleoclimate records, long-term monsoon dynamics are still not well understood in the western TP, which is currently influenced by both the Indian summer monsoon (ISM) and the westerlies. Here we present a multi-proxy lacustrine record covering the past 10,500 years from Aweng Co, an alpine lake at the northern limit of the modern ASM in western Tibet. Our results show that the western TP was mainly controlled by the ISM during the Holocene and the regional ecosystem/environment was sensitive to climate change. The climate was the wettest between 10.5 and 7.3 cal kyr BP, when terrestrial plants in the catchment were productive and the biomass of benthic algae was low possibly due to limited sunlight at the lake bottom due to high lake level. From 7.3 to 5.0 cal kyr BP the climate shifted towards drier conditions, resulting in a decline in terrestrial plant cover. Between 5.0 and 3.1 cal kyr BP, the climate became even drier, resulting in a further decline in vegetation cover in the catchment. Between 4.6 and 3.1 cal kyr BP, 100% endogenic dolomite precipitated from the lake water, possibly induced by high Mg/Ca ratios. After 3.1 cal kyr BP, the climate was the driest and frequent centennial-scale droughts occurred. The lake level was low and would have resulted in more light reaching the lake bottom, favoring the growth of benthic algae. The reconstructed lake level change of Aweng Co agrees well with the paleo-shoreline records in the southern TP, demonstrating that the ISM evolution played a key role in lake hydrological processes in this region. A comparison of paleoclimate records shows the ISM reached 34.5 degrees N in the western TP during the Holocene. (C) 2021 Elsevier Ltd. All rights reserved.
关键词	CLOSED-BASIN LAKES ASIAN MONSOON TANGRA YUMCO HYDROLOGIC RESPONSE INDIAN MONSOON PRECIPITATION PALEOCLIMATE TEMPERATURE QINGHAI OXYGEN
英文关键词	Indian summer monsoon; Paleoclimate; Lake level; Stable isotopes; Ostracods
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000644423800006
来源期刊	QUATERNARY SCIENCE REVIEWS
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/260420
推荐引用方式 GB/T 7714	Zhang, Yuzhi,Zhang, Jiawu,McGowan, Suzanne,et al. Climatic and environmental change in the western Tibetan Plateau during the Holocene, recorded by lake sediments from Aweng Co[J]. 中国科学院青藏高原研究所,2021,259.
APA	Zhang, Yuzhi.,Zhang, Jiawu.,McGowan, Suzanne.,Metcalfe, Sarah.,Jones, Matthew.,...&Hou, Juzhi.(2021).Climatic and environmental change in the western Tibetan Plateau during the Holocene, recorded by lake sediments from Aweng Co.QUATERNARY SCIENCE REVIEWS,259.
MLA	Zhang, Yuzhi,et al."Climatic and environmental change in the western Tibetan Plateau during the Holocene, recorded by lake sediments from Aweng Co".QUATERNARY SCIENCE REVIEWS 259(2021).