气候变化领域集成服务门户(CCPortal): Influence of the Indian monsoon and the subtropical jet on climate change on the Tibetan Plateau since the late Pleistocene

CCPortal

DOI	10.1016/j.quascirev.2017.03.013
	Influence of the Indian monsoon and the subtropical jet on climate change on the Tibetan Plateau since the late Pleistocene
	Hou, Juzhi; D'Andrea, William J.; Wang, Mingda; He, Yue; Liang, Jie
通讯作者	Hou, JZ (通讯作者)
发表日期	2017
ISSN	0277-3791
起始页码	84
结束页码	94
卷号	163
英文摘要	Precipitation atop the Tibetan Plateau (TP) is delivered by the Indian summer monsoon, the Asian summer monsoon, and weather systems associated with the subtropical westerly jet. Variations in the relative importance of the monsoon systems and the westerly jet are hypothesized to have occurred at decadal, millennial and glacial-interglacial scales. However, paleoclimate observations based on explicit climate proxies are still scarce, limiting our understanding of the mechanisms of Holocene climate variability on the Tibetan Plateau (TP). Here we present three independently dated compound specific hydrogen isotope records of sedimentary leaf waxes from lakes on the TP, Bangong Co, Lake Qinghai and Linggo Co. The leaf wax delta D records reflect isotopes in precipitation, and we combine these observations with existing isotopic and hydrological data to investigate variations in the influence of the summer monsoon and the westerly jet on the moisture budget of the TP since the Late Pleistocene. delta D values of precipitation at all three lakes were relatively positive during the Late Pleistocene indicating a weakened summer monsoon. During the early and mid-Holocene, delta D values of precipitation at the three lakes were relatively negative, suggesting the importance of summer monsoon. During the middle to late Holocene, delta D values at Bangong Co and Lake Qinghai gradually increased with superimposed episodes of short term of delta D variability. However, at Linggo Co in the northern TP, periods of more positive delta D values of precipitation correspond to wetter intervals inferred from lake level high stands, and likely reflect variations in moisture associated with the westerly jet. Thus, the delta D records at Linggo Co imply the lesser importance of summer monsoon moisture in the hydrologic budget of the northern TP. Collectively, the hydrogen isotope records at these three lakes document millennial and centennial scale variations in the strength of the summer monsoon systems and concurrent changes in the westerly jet. Furthermore, millennial-scale fluctuations in the delta D records at the three lakes during the middle to late Holocene suggest episodes of reduced summer monsoonal moisture delivery to these regions, and correspond with intervals of cool sea surface temperatures in the North Atlantic. (C) 2017 Elsevier Ltd. All rights reserved.
关键词	HOLOCENE ENVIRONMENTAL-CHANGES BASIN WESTERN TIBET INTERTROPICAL CONVERGENCE ZONE QINGHAI LAKE AREA STABLE-ISOTOPES ASIAN MONSOON DELTA-D HIGH-RESOLUTION N-ALKANES PRECIPITATION
英文关键词	Tibetan Plateau; Holocene; Monsoon; Westerlies; Hydrogen isotopes; Sedimentary leaf waxes
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000401204200005
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/259060
推荐引用方式 GB/T 7714	Hou, Juzhi,D'Andrea, William J.,Wang, Mingda,et al. Influence of the Indian monsoon and the subtropical jet on climate change on the Tibetan Plateau since the late Pleistocene[J]. 中国科学院青藏高原研究所,2017,163.
APA	Hou, Juzhi,D'Andrea, William J.,Wang, Mingda,He, Yue,&Liang, Jie.(2017).Influence of the Indian monsoon and the subtropical jet on climate change on the Tibetan Plateau since the late Pleistocene.QUATERNARY SCIENCE REVIEWS,163.
MLA	Hou, Juzhi,et al."Influence of the Indian monsoon and the subtropical jet on climate change on the Tibetan Plateau since the late Pleistocene".QUATERNARY SCIENCE REVIEWS 163(2017).