DOI: 10.1007/s00382-015-2620-3
Scopus记录号: 2-s2.0-84957441186
论文题名: Orbital control of the western North Pacific summer monsoon
作者: Wu C.-H. ; Chiang J.C.H. ; Hsu H.-H. ; Lee S.-Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-03-04 起始页码: 897
结束页码: 911
语种: 英语
英文关键词: Holocene
; Orbital forcing
; Paleomonsoon
; Precession
; Western North Pacific
英文摘要: Orbital forcing exerts a strong influence on global monsoon systems, with higher summer insolation leading to stronger summer monsoons in the Northern Hemisphere. However, the associated regional and seasonal changes, particularly the interaction between regional monsoon systems, remain unclear. Simulations using the Community Earth System Model demonstrate that the western North Pacific (WNP) summer monsoon responds to orbital forcing opposite to that of other major Northern Hemisphere monsoon systems. Compared with its current climate state, the simulated WNP monsoon and associated lower-tropospheric trough is absent in the early Holocene when the precession-modulated Northern Hemisphere summer insolation is higher, whereas the summer monsoons in South and East Asia are stronger and shift farther northward. We attribute the weaker WNP monsoon to the stronger diabatic heating of the summer Asian monsoon—in particular over the southern Tibetan Plateau and Maritime Continent—that in turn strengthens the North Pacific subtropical high through atmospheric teleconnections. By contrast, the impact of the midlatitude circulation changes on the WNP monsoon is weaker when the solar insolation is higher. Prior to the present WNP monsoon onset, the upper-tropospheric East Asian jet stream weakens and shifts northward; the monsoon onset is highly affected by the jet-induced high potential vorticity intrusion. In the instance of the extreme perihelion-summer, the WNP monsoon is suppressed despite a stronger midlatitude precursor than present-day, and the midlatitude circulation response to the enhanced South Asian precipitation is considerable. These conditions indicate internal monsoon interactions of an orbital scale, implying a potential mechanistic control of the WNP monsoon. © 2015, Springer-Verlag Berlin Heidelberg. 资助项目: MOST, Ministry of Science and Technology of the People's Republic of China
; MOST, Ministry of Science and Technology of the People's Republic of China
; NCAR, Ministry of Science and Technology of the People's Republic of China
; NSF, Ministry of Science and Technology of the People's Republic of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53824
Appears in Collections: 过去全球变化的重建
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作者单位: Research Center for Environmental Changes, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, Taiwan; Department of Geography, University of California, Berkeley, CA, United States
Recommended Citation:
Wu C.-H.,Chiang J.C.H.,Hsu H.-H.,et al. Orbital control of the western North Pacific summer monsoon[J]. Climate Dynamics,2016-01-01,46(2017-03-04)