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题名: The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years
作者: Cheng, H; Zhang, PZ(张平中); Spotl, C; Edwards, RL; Cai, YJ; Zhang, DZ; Sang, WC; Tan, M; An, ZS
收录类别: SCIE ; EI
出版日期: 2012-01-13
刊名: GEOPHYSICAL RESEARCH LETTERS
卷号: 39, 页码:-
出版者: AMER GEOPHYSICAL UNION
出版地: WASHINGTON
英文摘要: Central Asia is currently a semiarid-arid region, dominated by the Westerlies. It is important to understand mechanisms of climate and precipitation changes here, as water availability in the region is crucial today and in the future. High-resolution, absolutely-dated oxygen isotope (delta O-18) records of stalagmites from Kesang Cave characterize a dynamic precipitation history over most of the past 500,000 years. This record demonstrates, for the first time, that climate change in the region exhibits a processional rhythm with abrupt inceptions of low delta O-18 speleothem growth at times of high Northern Hemisphere summer insolation followed by gradual delta O-18 increases that track decreases of insolation. These observations and interpretations contrast with the interpretation of nearby, but higher elevation ice core records. The absolutely-dated cave delta O-18 shifts can be used to correlate the regional climate variability by providing chronological marks. Combined with other paleoclimate records, the Kesang observations suggest that possible incursions of Asian summer monsoon rainfall or related moisture into the Kesang site and/or adjacent areas during the high insolation times may play an important role in changing orbital-scale hydrology of the region. Based on our record, arid climate will prevail in this region for the next several millennia, providing that anthropogenic effects do not supersede natural processes. Citation: Cheng, H., P. Z. Zhang, C. Spotl, R. L. Edwards, Y. J. Cai, D. Z. Zhang, W. C. Sang, M. Tan, and Z. S. An (2012), The climatic cyclicity in semi-arid-arid central Asia over the past 500,000 years, Geophys. Res. Lett., 39, L01705, doi: 10.1029/2011GL050202.
作者部门: [Cheng, H.] Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China ; [Cheng, H. ; Edwards, R. L.] Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA ; [Zhang, P. Z. ; Zhang, D. Z. ; Sang, W. C.] Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China ; [Spoetl, C.] Leopold Franzens Univ, Inst Geol & Palaontol, A-6020 Innsbruck, Austria ; [Cai, Y. J. ; An, Z. S.] Chinese Acad Sci, Inst Earth Environm, Xian 710054, Shanxi, Peoples R China ; [Tan, M.] Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
通讯作者: Cheng, H (reprint author), Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China.
学科分类: Geology
文章类型: Article
所属项目编号: Xi'an Jiaotong University [93K40208000004] ; U.S. NSF [0502535, 0908792, 1103403] ; NSFC [40631003, 40772110, 40973007] ; State Key Laboratory of Loess and Quaternary Geology, CAS [SKLLQG1001] ; Gary Comer Science and Education Foundation [CC8, CP52] ; Austrian Science Fund
所属项目名称: 国家自然科学基金项目 ; 美国国家科学基金会项目
项目资助者: NSFC ; US NSF
语种: 英语
DOI: 10.1029/2011GL050202
ISSN号: 0094-8276
WOS记录号: WOS:000299178800004
EI记录号: 20120314702785
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/120133
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Cheng, H,Zhang, PZ,Spotl, C,et al. The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years[J]. GEOPHYSICAL RESEARCH LETTERS,2012,39:-.
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