DOI: 10.1175/JCLI-D-13-00443.1
Scopus记录号: 2-s2.0-84896085567
论文题名: Convective instability associated with the eastward-propagating rainfall episodes over Eastern China during the warm season
作者: Chen G. ; Yoshida R. ; Sha W. ; Iwasaki T. ; Qin H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 6 起始页码: 2331
结束页码: 2339
语种: 英语
Scopus关键词: Climate models
; Climatology
; Heat convection
; CAPE
; Convective available potential energies
; Convective instabilities
; Diurnal effects
; Meso-scale systems
; Monsoons
; Nocturnal low-level jets
; Stabilization effects
; Rain
; advection
; convective system
; data set
; diurnal variation
; mesoscale meteorology
; monsoon
; potential energy
; rainfall
; China
英文摘要: Analysis of the latest satellite rainfall and reanalysis datasets from 1998 to 2012 demonstrates that eastwardpropagating rainfall episodes, which typically occur in late night and morning, are determinant factors for the rainfall diurnal cycle and climate anomalies over eastern China. The episode growth and propagation are facilitated by an elevated layer of conditionally unstable air in a mesoscale zone at their eastern leading edge. The convective available potential energy (CAPE), despite convection consumption and nocturnal cooling, decreases only from a high value to a moderate one during episode duration. An estimate of the CAPE generation budget suggests that low-level horizontal advection and vertical lifting of the warm moist air can produce sufficient CAPE to balance other stabilization effects, sustaining the mesoscale maximum of convective instability ahead of rainfall episodes. These instability geneses are pronounced at the convection growth stage and linked closely to a mesoscale nocturnal low-level jet. Thus, a proper representation of them in forecast models is essential for improved prediction of the warm-season rainfall. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51406
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan; South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
Recommended Citation:
Chen G.,Yoshida R.,Sha W.,et al. Convective instability associated with the eastward-propagating rainfall episodes over Eastern China during the warm season[J]. Journal of Climate,2014-01-01,27(6)