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A climate threshold at the eastern edgeof the Tibetan plateau
Liu,XJ(Liu,Xujiu)[1,2]; Colman,SM(Colman.Steven M)[1]; Brown, ET(Brown, Erik T)[1,3]; An,ZS(An,Zhisheng)[4]; Zhou,WJ(Zhou,Weijian)[4]; Jull,AJT(Jull,A.J.Timothy)[5]; Huang,YS(Huang,Yongsong)[6]; Cheng,P(Cheng,Peng)[4]; Liu,WG(Liu,Weiguo)[4]; Xu,H(Xu,Hai)[4]
Source PublicationGeophysical Research Letters

Proxy records of summer monsoon moisture at Lake Qinghai on the northeastern Tibetan Plateau reveal a late Quaternary climate history that is subtly different from that of speleothems from southern and eastern China. Total organic carbon and authigenic carbonate in two independently analyzed and dated cores indicate (1) relative stability and aridity during the glacial interval, (2) small variations during the Bølling-Allerød and the Younger Dryas intervals, (3) comparatively abrupt change at the late Pleistocene/Holocene transition, and (4) relatively high variability during a wet early Holocene. Taken together, the data suggest that a climate threshold exists for penetration of Asian monsoon rainfall onto the Tibetan Plateau, a threshold that was crossed at the beginning of the Holocene. Conceptually, the threshold simply may be related to the topographic barrier that the eastern margin of the Tibetan Plateau presents to the landward penetration of the monsoon, or it may be related to nonlinearities in the climate system itself, such as sudden shifts in the configuration of the Westerly jet stream. Different mechanisms for producing a threshold are not mutually exclusive and may have combined to affect the dynamics of the Asian monsoon. In any case, the threshold is related to the presence of the Tibetan Plateau, which has a profound influence on the Asia monsoon system.

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Document Type期刊论文
Corresponding AuthorLiu,XJ(Liu,Xujiu)[1,2]
Affiliation1.Large Lakes Observatory, University of Minnesota, Duluth, Minnesota, USA;
2.Department of Earth Sciences, University ofMinnesota, Minneapolis, Minnesota, USA;
3.Department of Geological Sciences, University of Minnesota-Duluth, Duluth,Minnesota, USA;
4.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academyof Sciences, Xi’an, China;
5.NSF Arizona AMS Facility, University of Arizona, Tucson, Arizona, USA;
6.Department of GeologicalSciences, Brown University, Providence, Rhode Island, USA
Recommended Citation
GB/T 7714
Liu,XJ,Colman,SM,Brown, ET,et al. A climate threshold at the eastern edgeof the Tibetan plateau[J]. Geophysical Research Letters,2014:5598-5604.
APA Liu,XJ.,Colman,SM.,Brown, ET.,An,ZS.,Zhou,WJ.,...&Xu,H.(2014).A climate threshold at the eastern edgeof the Tibetan plateau.Geophysical Research Letters,5598-5604.
MLA Liu,XJ,et al."A climate threshold at the eastern edgeof the Tibetan plateau".Geophysical Research Letters (2014):5598-5604.
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