气候变化领域集成服务门户(CCPortal): Paleohydrological Changes in the Western Tibetan Plateau over the Past 16,000 years Based on Sedimentary Records ofn-Alkanes and Grain Size

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DOI	10.1111/1755-6724.14538
	Paleohydrological Changes in the Western Tibetan Plateau over the Past 16,000 years Based on Sedimentary Records ofn-Alkanes and Grain Size
	Wang Mingda; Yang Yaping; Zhang Jiawu; Hou Juzhi
通讯作者	Wang, MD ; Hou, JZ (通讯作者)
发表日期	2020
ISSN	1000-9515
EISSN	1755-6724
起始页码	707
结束页码	716
卷号	94 期号:3
英文摘要	Both monsoons and westerlies have exerted influence on climate dynamics over the Tibetan Plateau (TP) since the last deglaciation, producing complex patterns of paleohydroclimatic conditions. Diverse proxy records are essential to forge a robust understanding of the climate system on the TP. Currently, there is a general lack of understanding of the response of inland lakes over the TP to climate change, especially glacier-fed lakes. Paleohydrological reconstructions of such lakes could deepen our understanding of the history of lake systems and their relationship to regional climate variability. Here we use records ofn-alkanes and grain size from the sediments of Bangong Co in the western TP to reconstruct paleohydrological changes over the past 16,000 years. ThePaq record (the ratio of non-emergent aquatic macrophytes versus emergent aquatic macrophytes and terrestrial plants) is generally consistent with the variations in summer temperature and precipitation isotopes. The changes in grain-size distributions show a similar trend toPaq but with less pronounced fluctuations in the early-middle Holocene. The new data combined with previous results from the site demonstrate that: 1) Bangong Co experienced relatively large water-level fluctuations during the last deglaciation, with a steadily high lake-level during the early-middle Holocene and a decreasing lake-level in the late Holocene; 2) The lake level fluctuations were driven by both high summer temperatures via the melting water and monsoon precipitation. However, the dominant factor controlling lake level changed over time. The lake-level history at Bangong Co deduced from then-alkanes and grain-size records reveals the past hydrological changes in the catchment area, and stimulates more discussion about the future of glacier-fed lakes under the conditions of unprecedented warming in the region.
关键词	HOLOCENE ENVIRONMENTAL-CHANGES LAKE-LEVEL CHANGES HYDROGEN-ISOTOPIC COMPOSITION LAST GLACIAL MAXIMUM DELTA-D VALUES WAX N-ALKANES NAM-CO BANGONG CO PALEOCLIMATE CHANGES LIPID BIOMARKERS
英文关键词	lake level; n-alkane; Paq; grain size; Bangong Co; Tibetan Plateau
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000544351300014
来源期刊	ACTA GEOLOGICA SINICA-ENGLISH EDITION
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/259700
推荐引用方式 GB/T 7714	Wang Mingda,Yang Yaping,Zhang Jiawu,et al. Paleohydrological Changes in the Western Tibetan Plateau over the Past 16,000 years Based on Sedimentary Records ofn-Alkanes and Grain Size[J]. 中国科学院青藏高原研究所,2020,94(3).
APA	Wang Mingda,Yang Yaping,Zhang Jiawu,&Hou Juzhi.(2020).Paleohydrological Changes in the Western Tibetan Plateau over the Past 16,000 years Based on Sedimentary Records ofn-Alkanes and Grain Size.ACTA GEOLOGICA SINICA-ENGLISH EDITION,94(3).
MLA	Wang Mingda,et al."Paleohydrological Changes in the Western Tibetan Plateau over the Past 16,000 years Based on Sedimentary Records ofn-Alkanes and Grain Size".ACTA GEOLOGICA SINICA-ENGLISH EDITION 94.3(2020).