气候变化领域集成服务门户(CCPortal): Holocene Moisture Variation Recorded by Aeolian Sand-Palaeosol Sequences of the Gonghe Basin, Northeastern Qinghai-Tibetan Plateau, China

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DOI	10.1111/1755-6724.14541
	Holocene Moisture Variation Recorded by Aeolian Sand-Palaeosol Sequences of the Gonghe Basin, Northeastern Qinghai-Tibetan Plateau, China
	Liu Bing; Zhao Hui; Jin Heling; Chen Fahu
通讯作者	Zhao, H (通讯作者)
发表日期	2020
ISSN	1000-9515
EISSN	1755-6724
起始页码	668
结束页码	681
卷号	94 期号:3
英文摘要	The northeastern Qinghai-Tibetan Plateau (QTP) of China is located at the triple junction of the Asian winter and summer monsoons and the westerlies, where paleoclimatic evolution has an important scientific significance for recognizing the spatial-temporal pattern of Asian monsoons in the past and predicting environmental change in the future. Nevertheless, the framework of the Holocene moisture variation and related mechanisms remain controversial, owing to complex hydroclimatic conditions triggered by the landform of the large mountain-arid basin. Here, we employed geochemical proxies from typical aeolian sand-palaeosol sequences in the Gonghe Basin, northeastern QTP, together with Optically Stimulated Luminescence (OSL) dating, to reconstruct the pattern of effective moisture variation and associated mechanisms in this region. Our results indicate that the regional effective moisture was at its lowest until 9-8 ka, and approached a maximum during 8-4/3 ka of the middle Holocene. Afterwards, the climate became relatively dry in general, but with a transient humid interval around 2-1 ka. Our geochemical evidence indicates that the dry early Holocene probably can be attributed to a strong winter monsoon forced by remnant ice sheet, combined with the high evaporation caused by solar insolation. Also, shifts of humid-dry are closely linked to the Asian summer monsoonal strength and therefore the balance of evaporation-precipitation in the middle and late Holocene. Thus, the pattern of the Holocene effective moisture variation is characterized as the 'monsoon model' in a closed intermontane arid and semi-arid basin near the western Asian monsoonal limit.
关键词	SUMMER MONSOON MAXIMUM CLIMATIC-CHANGE NORTHERN CHINA ENVIRONMENTAL-CHANGES ASIAN MONSOON LAKE AREA OXYGEN-ISOTOPE DEPOSITS EAST DESERT
英文关键词	effective moisture; geochemical analysis; aeolian deposits; Holocene; Gonghe Basin
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000544351300010
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/259677
推荐引用方式 GB/T 7714	Liu Bing,Zhao Hui,Jin Heling,et al. Holocene Moisture Variation Recorded by Aeolian Sand-Palaeosol Sequences of the Gonghe Basin, Northeastern Qinghai-Tibetan Plateau, China[J]. 中国科学院青藏高原研究所,2020,94(3).
APA	Liu Bing,Zhao Hui,Jin Heling,&Chen Fahu.(2020).Holocene Moisture Variation Recorded by Aeolian Sand-Palaeosol Sequences of the Gonghe Basin, Northeastern Qinghai-Tibetan Plateau, China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,94(3).
MLA	Liu Bing,et al."Holocene Moisture Variation Recorded by Aeolian Sand-Palaeosol Sequences of the Gonghe Basin, Northeastern Qinghai-Tibetan Plateau, China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 94.3(2020).