DOI: 10.1002/2014GL060833
论文题名: A climate threshold at the eastern edge of the Tibetan plateau
作者: Liu X. ; Colman S.M. ; Brown E.T. ; An Z. ; Zhou W. ; Jull A.J.T. ; Huang Y. ; Cheng P. ; Liu W. ; Xu H.
刊名: Geophysical Research Letters
ISSN: 0094-9880
EISSN: 1944-9611
出版年: 2014
卷: 41, 期: 15 起始页码: 5598
结束页码: 5604
语种: 英语
英文关键词: Asian Monsoon
; Lake Qinghai
Scopus关键词: Lakes
; Rain
; Organic carbon
; Asian monsoon
; Authigenic carbonates
; Different mechanisms
; Lake Qinghai
; Northeastern tibetan plateaux
; Relative stabilities
; Total Organic Carbon
; Westerly jet streams
; Late Pleistocene
; Small variations
; Atmospheric thermodynamics
; climate modeling
; climate variation
; monsoon
; paleoclimate
; Quaternary
; speleothem
; topography
; China
; Qinghai-Xizang Plateau
英文摘要: 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. Key Points Proxy records at Lake Qinghai reveal a different climate history A climate threshold exists for penetration of Asian monsoon rainfall The threshold is related to the presence of the Tibetan Plateau © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905289441&doi=10.1002%2f2014GL060833&partnerID=40&md5=809664ab62c95f835dfe432038829b7b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7144
Appears in Collections: 气候减缓与适应
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作者单位: Large Lakes Observatory, University of Minnesota, Duluth, MN, United States
Recommended Citation:
Liu X.,Colman S.M.,Brown E.T.,et al. A climate threshold at the eastern edge of the Tibetan plateau[J]. Geophysical Research Letters,2014-01-01,41(15).