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Changes in dominant moisture sources and the consequences for hydroclimate on the northeastern Tibetan Plateau during the past 32 kyr
Thomas, Elizabeth K.1; Huang, Yongsong1,2; Clemens, Steven C.1; Colman, Steven M.3; Morrill, Carrie4,5; Wegener, Pamela1; Zhao, Jiangtao2
2016
Source PublicationQUATERNARY SCIENCE REVIEWS
Volume131Issue:2016Pages:157-167
SubtypeArticle
AbstractLake Qinghai, located on the northeastern Tibetan Plateau north of the modern maximum summer monsoon extent, is well situated to record northward advances of the summer monsoon. Existing paleoclimate records contain conflicting evidence for the timing of summer monsoon advance into this region: an early arrival pre-Younger Dryas or a late arrival at the beginning of the Holocene. A 30-kyr-long leaf wax hydrogen isotope (n-alkanoic acid, delta H-2(wax)) record from Lake Qinghai helps to address this discrepancy by elucidating changes in the three main moisture sources in this region: southerly (summer monsoon), northwesterly, and local precipitation. Lake Qinghai delta H-2(wax) indicates that the arid glacial period was dominated by northwesterly moisture. Extremely arid conditions prevailed from 15 to 14 ka, likely because westerly winds were weakening and the summer monsoon had not yet reached this region. This arid period ended by 13.6 ka when small amounts of summer monsoon precipitation reached Lake Qinghai. Summer monsoon moisture subsequently retreated off of the northeastern Tibetan Plateau during the Younger Dryas and re-advanced in the early Holocene. Summer monsoon precipitation decreased progressively throughout the Holocene in response to decreasing summer insolation, and the modern northwesterly- and local-dominated moisture regime was attained ca. 2.6 ka. Lake Qinghai delta H-2(wax) demonstrates that the summer monsoon extent was dynamic during the past 30 kyr, responding dramatically to insolation and North Atlantic circulation changes. Moreover, Lake Qinghai delta H-2(wax) demonstrates that local and northwesterly air masses are important moisture sources to the northeastern Tibetan Plateau, and should be considered when reconstructing past hydroclimate in this region. (C) 2015 Elsevier Ltd. All rights reserved.
KeywordLeaf Wax Hydrogen Isotopes Tibetan Plateau Monsoon Westerlies Younger Dryas Holocene
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.quascirev.2015.11.003
WOS KeywordASIAN SUMMER MONSOON ; STABLE-ISOTOPE COMPOSITION ; CHINA WESTERN INTERIOR ; QINGHAI LAKE AREA ; DELTA-D VALUES ; HIGH-RESOLUTION ; LAST DEGLACIATION ; OXYGEN-ISOTOPE ; EAST-ASIA ; AEOLIAN DEPOSITS
Indexed BySCI
Language英语
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000367490200010
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5855
Collection加速器质谱中心
Affiliation1.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA
2.Chinese Acad Sci, Inst Earth Environm, Xian 710061, Peoples R China
3.Univ Minnesota, Large Lakes Observ, Duluth, MN 55812 USA
4.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80305 USA
5.NOAAs Natl Ctr Environm Informat, Boulder, CO 80305 USA
Recommended Citation
GB/T 7714
Thomas, Elizabeth K.,Huang, Yongsong,Clemens, Steven C.,et al. Changes in dominant moisture sources and the consequences for hydroclimate on the northeastern Tibetan Plateau during the past 32 kyr[J]. QUATERNARY SCIENCE REVIEWS,2016,131(2016):157-167.
APA Thomas, Elizabeth K..,Huang, Yongsong.,Clemens, Steven C..,Colman, Steven M..,Morrill, Carrie.,...&Zhao, Jiangtao.(2016).Changes in dominant moisture sources and the consequences for hydroclimate on the northeastern Tibetan Plateau during the past 32 kyr.QUATERNARY SCIENCE REVIEWS,131(2016),157-167.
MLA Thomas, Elizabeth K.,et al."Changes in dominant moisture sources and the consequences for hydroclimate on the northeastern Tibetan Plateau during the past 32 kyr".QUATERNARY SCIENCE REVIEWS 131.2016(2016):157-167.
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