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Holocene moisture and East Asian summer monsoon evolution in the northeastern Tibetan Plateau recorded by Lake Qinghai and its environs: A review of conflicting proxies
Chen, Fahu1,2; Wu, Duo1,5; Chen, Jianhui1; Zhou, Aifeng1; Yu, Junqing3; Shen, Ji4; Wang, Sumin4; Huang, Xiaozhong1
2016-12-15
Source PublicationQUATERNARY SCIENCE REVIEWS
Volume154Pages:111-129
SubtypeReview
AbstractClimatic and environmental changes in the northeastern Tibetan Plateau are controlled by the Asian summer monsoon (ASM) and the westerlies, two key circulation components of the global climate system which directly affect a large human population and associated ecosystems in eastern Asia. During the past few decades, a series of Holocene palaeoclimatic records have been obtained from sediment cores from Lake Qinghai and from various other geological archives in the surrounding area of the northeastern Tibetan Plateau. However, because of uncertainties regarding the sediment chronologies and the climatic significance of the proxies used, the nature of Holocene climatic changes in the region remains unclear and even controversial. Here we review all major classes of the published data from drilled cores from Lake Qinghai, as well as other evidence from lakes and aeolian deposits from surrounding areas, in order to reconstruct changes in moisture patterns and possible summer monsoon evolution in the area during the Holocene. Combining the results of moisture and precipitation proxies such as vegetation history, pollen-based precipitation reconstruction, aeolian activity, lake water depth/lake level changes, salinity and sediment redness, we conclude that moisture and precipitation began to increase in the early Holocene, reached their maximum during the middle Holocene, and decreased during the late Holocene- similar to the pattern of the East Asian summer monsoon (EASM) in northern China. It is clear that the region experienced a relatively dry climate and weak EASM during the early Holocene, as indicated by relatively low tree pollen percentages and fluctuating pollen concentrations; generally low lake levels of Lake Qinghai and the adjacent Lake Hurleg and Lake Toson in the Qaidam Basin; and widely distributed aeolian sand deposition in the Lake Qinghai Basin and the nearby Gonghe Basin to the south, and in the eastern Qaidam Basin to the west. We argue that the ostracod delta O-18 record, which is widely used as a proxy of effective moisture and summer monsoon intensity in lake sediments, at least in Lake Qinghai, and which exhibits light values in the early Holocene and heavier values thereafter, cannot be used to reflect the strength of the EASM or the intensity of monsoon precipitation- as is also the case for leaf wax delta H-2 records. Rather, we argue that as is the case of the Chinese speleothem delta O-18 record, which also is often interpreted as an EASM proxy, it reflects variation in the delta O-18 of precipitation. Overall, we suggest that the EASM significantly affected precipitation in the northeastern Tibetan Plateau during the Holocene; and that it increased in strength during the early Holocene, reached a maximum during the middle Holocene and decreased during the late Holocene. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordNortheastern Tibetan Plateau Lake Qinghai Easm Evolution Middle Holocene Easm Maximum
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordLAST GLACIAL MAXIMUM ; OXYGEN-ISOTOPE RECORD ; CHINESE LOESS PLATEAU ; HIGH-RESOLUTION ; GONGHE BASIN ; NORTHERN CHINA ; CLIMATE-CHANGE ; AEOLIAN SEDIMENTS ; CARBON ISOTOPES ; NORTHWEST CHINA
Indexed BySCI
Language英语
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000390505700005
Citation statistics
Cited Times:33[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6181
Collection青海盐湖研究所知识仓储
盐湖地质与环境实验室
Affiliation1.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
4.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China
5.Univ Pittsburgh, Dept Geol & Environm Sci, Pittsburgh, PA 15260 USA
Recommended Citation
GB/T 7714
Chen, Fahu,Wu, Duo,Chen, Jianhui,et al. Holocene moisture and East Asian summer monsoon evolution in the northeastern Tibetan Plateau recorded by Lake Qinghai and its environs: A review of conflicting proxies[J]. QUATERNARY SCIENCE REVIEWS,2016,154:111-129.
APA Chen, Fahu.,Wu, Duo.,Chen, Jianhui.,Zhou, Aifeng.,Yu, Junqing.,...&Huang, Xiaozhong.(2016).Holocene moisture and East Asian summer monsoon evolution in the northeastern Tibetan Plateau recorded by Lake Qinghai and its environs: A review of conflicting proxies.QUATERNARY SCIENCE REVIEWS,154,111-129.
MLA Chen, Fahu,et al."Holocene moisture and East Asian summer monsoon evolution in the northeastern Tibetan Plateau recorded by Lake Qinghai and its environs: A review of conflicting proxies".QUATERNARY SCIENCE REVIEWS 154(2016):111-129.
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