DOI: 10.1016/j.atmosres.2018.06.003
Scopus记录号: 2-s2.0-85048804815
论文题名: Diurnal cycles of Mei-yu rainfall simulated over eastern China: Sensitivity to cumulus convective parameterization
作者: Cai Y. ; Lu X. ; Chen G. ; Yang S.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 213 起始页码: 236
结束页码: 251
语种: 英语
英文关键词: Cumulus parameterization schemes
; Diurnal cycle of precipitation
; Model simulation
; Nocturnal rainfall
Scopus关键词: Clouds
; Moisture
; Parameterization
; Potential energy
; Convective available potential energies
; Convective parameterization
; Cumulus parameterization schemes
; Diurnal cycle
; Inertial oscillation
; Model simulation
; Moisture convergence
; Realistic simulation
; Rain
; atmospheric moisture
; computer simulation
; convective system
; cumulus
; diurnal variation
; parameterization
; precipitation (climatology)
; rainfall
; China
; Qinghai-Xizang Plateau
; Citrus maxima
英文摘要: Realistic simulation of the diurnal cycle of rainfall has been regarded as one of the challenging issues. This study investigates the sensitivity of simulating the diurnal cycle of Mei-yu rainfall over eastern China to cumulus parameterization schemes (CPSs) and the associated physical mechanisms using WRF model. Although CPSs reproduce well the late-afternoon peak of rainfall, they differ largely in simulating the early-morning peak that is closely associated with the eastward-propagating (locally-growing) nocturnal systems over the eastern slope of the Tibetan Plateau (lower reach of the Yangtze River valley). The Kain-Fritsch (KF) scheme with an alternative trigger function (KFtrigger2) shows the best performance on capturing the diurnal phase and amplitude of rainfalls. Compared to the KFtrigger2 scheme, the KF scheme enhances moisture convergence and terrain-induced circulations that are favorable for the propagating rainfall systems in the western region. The intensive southerly wind due to inertial oscillation, with stronger upward motion and moisture convergence and higher convective available potential energy (CAPE), also lead to more locally-growing nocturnal rainfall in the eastern region. The Betts-Miller-Janjic scheme produces a more stable atmosphere with weaker upward motion and smaller CAPE, resulting in a poor simulation of convective and non-convective rainfalls with a 2-h delay for the peaks of two kinds of nocturnal systems. The Grell-3D scheme produces the relatively weak and short-lived propagating nocturnal rainfall owing to the weaker circulation and drier conditions in the middle troposphere. However, it reproduces the unstable atmosphere with relatively strong upward motion and moisture convergence, resulting in more convective rainfall in the locally-growing nocturnal systems. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108787
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: School of Atmospheric Sciences, Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, Guangdong, China
Recommended Citation:
Cai Y.,Lu X.,Chen G.,et al. Diurnal cycles of Mei-yu rainfall simulated over eastern China: Sensitivity to cumulus convective parameterization[J]. Atmospheric Research,2018-01-01,213