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Moisture evolution in Central Asia since 26 ka: Insights from a Kyrgyz loess section, Western Tian Shan

文献类型：期刊论文

作者Li, Yue1,2,3; Song, Yougui1,2; Orozbaev, Rustam4,5,7; Dong, Jibao1,2; Li, Xinzhou1,6; Zhou, Jie1,2,3
刊名QUATERNARY SCIENCE REVIEWS
出版日期2020-12-01
卷号249页码:18
ISSN号0277-3791
关键词Central Asia Loess Grain size Color Moisture Forcing mechanisms Climate dynamics
DOI10.1016/j.quascirev.2020.106604
通讯作者Song, Yougui(syg@ieecas.cn)
英文摘要Central Asia (CA) is located in the hinterland of the Eurasian continent, and faces an extreme risk of continued aridification under the current global warming trend. To predict future climate change in CA, paleoclimate studies provide essential references. However, the mechanisms underlying climate changes in CA remain relatively poorly known. Here, we investigate moisture variations in CA, as recorded in a 6-m loess section in the Western Tian Shan, Kyrgyzstan, which has accumulated since-26 ka based on the radiometric AMS C-14 dating. We reconstructed the evolution of the wind regime and moisture conditions in the Western Tian Shan with a modified grain size index (GSI(m)) and a new L* proxy (Delta L*). While the frequency-dependent magnetic susceptibility (cfd), redness (a*) and yellowness (b*) did not provide reliable paleoclimatic indicators, due to weak pedogenesis and other controlling factors. The GSI(m) records demonstrated a precipitation maximum in summer before-15 ka, shifting to a maximum in spring after-15 ka, probably associated with large-scale modulation of the latitudinal climatic zones and atmospheric circulation in response to retreat of the Northern Hemisphere ice sheets. Based on the Delta L* records, we place emphases on the important role of temperature-modulated evaporation in moisture evolution across CA; however, this has only influenced moisture evolution in spring and summer, with little effect on winter moisture conditions. Moreover, the Delta L* records may also indicate that atmospheric humidity can partly affect the long-term effective moisture variations. (C) 2020 Elsevier Ltd. All rights reserved.
WOS关键词ARID CENTRAL-ASIA ; GRAIN-SIZE DISTRIBUTION ; LAST GLACIAL PERIOD ; CHINESE LOESS ; TIEN-SHAN ; CLIMATIC CHANGES ; ATMOSPHERIC CIRCULATION ; NORTHERN CHINA ; EAST-ASIA ; ICE-SHEET
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; Natural Science Foundation of China[41977385] ; Natural Science Foundation of China[41572162] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0101] ; Chinese Academy of Sciences[132861KYSB20170005] ; State Key Laboratory of Loess and Quaternary Geology[SKLLQGPY2006]
WOS研究方向Physical Geography ; Geology
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000589910600001
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology
源URL[http://ir.ieecas.cn/handle/361006/15680]  
专题地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
第四纪科学与全球变化卓越创新中心
通讯作者Song, Yougui
作者单位1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, 97 Yanxiang Rd, Xian 710061, Peoples R China
2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Natl Acad Sci Kyrgyz Republ, Inst Geol, Bishkek 720040, Kyrgyzstan
5.Amer Univ Cent Asia, Dept Appl Geol, Bishkek 720060, Kyrgyzstan
6.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
7.Res Ctr Ecol & Environm Cent Asia Bishkek, Bishkek 720040, Kyrgyzstan
推荐引用方式
GB/T 7714		 Li, Yue,Song, Yougui,Orozbaev, Rustam,et al. Moisture evolution in Central Asia since 26 ka: Insights from a Kyrgyz loess section, Western Tian Shan[J]. QUATERNARY SCIENCE REVIEWS,2020,249:18.
APA Li, Yue,Song, Yougui,Orozbaev, Rustam,Dong, Jibao,Li, Xinzhou,&Zhou, Jie.(2020).Moisture evolution in Central Asia since 26 ka: Insights from a Kyrgyz loess section, Western Tian Shan.QUATERNARY SCIENCE REVIEWS,249,18.
MLA Li, Yue,et al."Moisture evolution in Central Asia since 26 ka: Insights from a Kyrgyz loess section, Western Tian Shan".QUATERNARY SCIENCE REVIEWS 249(2020):18.

入库方式： OAI收割

来源：地球环境研究所

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