DOI: 10.1175/JCLI-D-15-0133.1
Scopus记录号: 2-s2.0-84946202959
论文题名: The effect of midlatitude transient eddies on monsoonal southerlies over eastern China
作者: Park H.-S. ; Lintner B.R. ; Boos W.R. ; Seo K.-H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 21 起始页码: 8450
结束页码: 8465
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Troposphere
; Baroclinic waves
; Composite analysis
; Diabatic heating
; East Asian monsoon
; Heavy precipitation
; Potential temperature
; Quasi-geostrophic
; Static stability
; Tropics
; atmospheric circulation
; baroclinic wave
; eddy
; extratropical environment
; midlatitude environment
; monsoon
; synoptic meteorology
; troposphere
; wind
; China
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The strengthening of monsoonal southerlies over East Asia is associated with the westward intensification of the North Pacific subtropical high. Previous work has shown that the seasonal-mean position and strength of subtropical highs are affected by tropical and subtropical diabatic heating. Here it is shown that the synoptic-time-scale strengthening of southerlies over eastern China is dynamically tied to extratropical eddy activity. Composite analysis based on strong southerly wind events highlights an antecedent baroclinic wave train propagating southeastward into eastern China from extratropical central Asia. This wave train generates quasigeostrophic ascent over eastern China that is associated with heavy precipitation. The anomalously cold upper-tropospheric conditions associated with the wave train decrease static stability throughout the lower and middle troposphere in eastern China, while low-level moistening enhances equivalent potential temperature. It is proposed that the resulting reductions in dry andmoist static stability intensify the eddy-induced precipitating ascent. These results illustrate how East Asian monsoon circulation and precipitation can be enhanced by the interaction of midlatitude baroclinic waves with the moist subtropical monsoon region. © 2015 American Meteorological Society. 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50472
Appears in Collections: 气候变化事实与影响
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作者单位: Korea Institute of Geoscience and Mineral Resources, Daejeon, South Korea; Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States; Department of Geology and Geophysics, Yale University, New Haven, CT, United States; Department of Atmospheric Sciences, Pusan National University, Busan, South Korea
Recommended Citation:
Park H.-S.,Lintner B.R.,Boos W.R.,et al. The effect of midlatitude transient eddies on monsoonal southerlies over eastern China[J]. Journal of Climate,2015-01-01,28(21)