DOI: 10.1002/2016GL071083
论文题名: A possible precursor of the South China Sea summer monsoon onset: Effect of the South Asian High
作者: Liu B. ; Zhu C.
刊名: Geophysical Research Letters
ISSN: 0094-8455
EISSN: 1944-8186
出版年: 2016
卷: 43, 期: 20 起始页码: 11072
结束页码: 11079
语种: 英语
英文关键词: South China Sea summer monsoon onset
Scopus关键词: Shear flow
; Angular momentum conservation
; Cross-equatorial flow
; Early indicators
; Positive potential
; South China sea
; South China Sea summer monsoon
; Upper troposphere
; Vertical temperature gradients
; Atmospheric thermodynamics
英文摘要: In climatology, the South China Sea (SCS) summer monsoon (SCSSM) generally onsets in Pentad 28 (16–20 May). The eastward extension of the South Asian High into the SCS in Pentad 27 is a possible precursor to the SCSSM onset. In the upper troposphere, the South Asian High (SAH) warms the air by inducing the positive potential vorticity advection, which strengthens precipitation over the southern SCS. When local convection becomes strong enough to decrease the vertical temperature gradient in Pentads 28–29, the upper level warming center overlies the subcloud warm region over the SCS to satisfy the requirement of the angular momentum conservation. A cross-equatorial flow then forms, together with strong vertical easterly wind shear and deep monsoon convection over the SCS, marking the full establishment of the SCSSM. The abrupt change in the SAH in May could therefore be an early indicator of the onset of the SCSSM. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995629564&doi=10.1002%2f2016GL071083&partnerID=40&md5=67a32209f94146fdefc2ac94a604a558
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9418
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: State Key Laboratory of Severe Weather and Institute of Climate System, Chinese Academy of Meteorological Sciences, Beijing, China
Recommended Citation:
Liu B.,Zhu C.. A possible precursor of the South China Sea summer monsoon onset: Effect of the South Asian High[J]. Geophysical Research Letters,2016-01-01,43(20).