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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
发表期刊QUATERNARY SCIENCE REVIEWS
卷号131期号:2016页码:157-167
文章类型Article
摘要Lake 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.
关键词Leaf Wax Hydrogen Isotopes Tibetan Plateau Monsoon Westerlies Younger Dryas Holocene
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.quascirev.2015.11.003
关键词[WOS]ASIAN SUMMER MONSOON ; STABLE-ISOTOPE COMPOSITION ; CHINA WESTERN INTERIOR ; QINGHAI LAKE AREA ; DELTA-D VALUES ; HIGH-RESOLUTION ; LAST DEGLACIATION ; OXYGEN-ISOTOPE ; EAST-ASIA ; AEOLIAN DEPOSITS
收录类别SCI
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000367490200010
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5855
专题加速器质谱中心
作者单位1.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
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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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