IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years
Cheng, H (Cheng, H.)[1,2]; Zhang, PZ (Zhang, P. Z.)[3]; Spotl, C (Spoetl, C.)[4]; Edwards, RL (Edwards, R. L.)[2]; Cai, YJ (Cai, Y. J.)[5]; Zhang, DZ (Zhang, D. Z.)[3]; Sang, WC (Sang, W. C.)[3]; Tan, M (Tan, M.)[6]; An, ZS (An, Z. S.)[5]
2012-01-13
Source PublicationGEOPHYSICAL RESEARCH LETTERS
Volume39Pages:L01705
Subtype期刊论文
Abstract

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(18)O) 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(18)O speleothem growth at times of high Northern Hemisphere summer insolation followed by gradual delta(18)O 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(18)O 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.

DOI10.1029/2011GL050202
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10209
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorCheng, H (Cheng, H.)[1,2]
Affiliation1.Institute of Global Environmental Change, Xi’an Jiaotong University,Xi’an, China;
2.Department of Earth Sciences, University of Minnesota, Minneapolis,Minnesota, USA;
3.College of Earth and Environment Sciences, Lanzhou University,Lanzhou, China;
4.Institut für Geologie und Paläontologie, Leopold-Franzens-Universität,Innsbruck, Austria;
5.Institute of Earth Environment, Chinese Academy of Sciences, Xi’an,China;
6.Institute of Geology and Geophysics, Chinese Academy of Sciences,Beijing, China
Recommended Citation
GB/T 7714
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:L01705.
APA Cheng, H .,Zhang, PZ .,Spotl, C .,Edwards, RL .,Cai, YJ .,...&An, ZS .(2012).The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years.GEOPHYSICAL RESEARCH LETTERS,39,L01705.
MLA Cheng, H ,et al."The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years".GEOPHYSICAL RESEARCH LETTERS 39(2012):L01705.
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