DOI: 10.1007/s00382-017-3784-9
Scopus记录号: 2-s2.0-85024494920
论文题名: Lagged response of summer precipitation to insolation forcing on the northeastern Tibetan Plateau during the Holocene
作者: Zhang X. ; Jin L. ; Chen J. ; Lu H. ; Chen F.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-09-10 起始页码: 3117
结束页码: 3129
语种: 英语
英文关键词: East Asian summer monsoon
; Holocene
; Model–proxy comparison
; Northeastern Tibetan Plateau
; Orbital forcing
Scopus关键词: Arctic Oscillation
; atmospheric forcing
; climate modeling
; Holocene
; insolation
; orbital forcing
; paleoclimate
; precipitation (climatology)
; proxy climate record
; sea surface temperature
; summer
; westerly
; China
; Pacific Ocean
; Pacific Ocean (Northwest)
; Qinghai-Xizang Plateau
; Ostracoda
英文摘要: The precipitation changes on the northeastern Tibetan Plateau during the Holocene remain unclear due to discrepancies among different proxy records. We compared proxy records with the results from a transient simulation performed using the Kiel Climate Model forced by orbital variations, to analyse summer precipitation changes in this area during the Holocene (9.5–0 ka BP). The model results suggested increasing amounts of summer precipitation from 9.5 to ~6.2 ka BP and a persistent decline thereafter, which matched well with pollen records but was inconsistent with ostracod δ18O records. The Holocene climatic optimum lagged the Northern Hemisphere summer insolation maximum by ~3.5 ka, caused by the interplay between the East Asian summer monsoon (EASM) circulation and the mid-latitude westerlies. The ostracod δ18O values reflected the strength of the EASM circulation. A strong EASM circulation increased the transport of water vapour towards the northeastern Tibetan Plateau from the northwestern Pacific. Weakened mid-latitude westerlies increased the incursion of cold air masses into the northeastern Tibetan Plateau. During the early Holocene, relatively strong mid-latitude westerlies, resulting from an enhanced Arctic Oscillation, reduced summer precipitation on the northeastern Tibetan Plateau, in spite of a strong insolation-driven EASM circulation. The weakening EASM circulation and the strengthening westerlies together induced the decreasing trend of summer precipitation from the middle to late Holocene. In addition, summer precipitation variations were further modulated by sea-surface temperatures in the northwestern Pacific, through weakening the strength of the EASM. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109307
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China; MOE Key Laboratory of Western China’s Environmental System, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China
Recommended Citation:
Zhang X.,Jin L.,Chen J.,et al. Lagged response of summer precipitation to insolation forcing on the northeastern Tibetan Plateau during the Holocene[J]. Climate Dynamics,2018-01-01,50(2018-09-10)