DOI: 10.1002/2017MS000926
Scopus记录号: 2-s2.0-85026733167
论文题名: Effects of artificial local compensation of convective mass flux in the cumulus parameterization
作者: Ong H ; , Wu C ; -M ; , Kuo H ; -C
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 4 起始页码: 1811
结束页码: 1827
语种: 英语
英文关键词: Hurricanes
; Parameterization
; Sea level
; Storms
; Tropics
; Weather forecasting
; Cumulus parameterization
; Fully compressible
; Horizontal resolution
; Mass continuity equation
; Non-hydrostatic
; Secondary circulation
; Tropical cyclone
; Weather research and forecasting models
; Clouds
; climate modeling
; climate prediction
; compressibility
; convection
; energy flow
; experimental study
; mass transfer
; moisture transfer
; numerical model
; parameterization
; precipitation (climatology)
; sea level pressure
; tropical cyclone
英文摘要: In this study, a hybrid mass flux cumulus scheme (HYMACS) is developed for the Weather Research and Forecasting Model (WRF). Idealized experiments are performed to evaluate its effects on tropical cyclone simulations. Classical cumulus schemes assume artificial local compensation of convective mass flux. In contrast, HYMACS treats subgrid-scale mass flux convergence or divergence as parameterized mass sources or sinks. When the mass sources or sinks are introduced to the mass continuity equation in a nonhydrostatic fully compressible model, the model dynamics would resolve the mass-compensating motion, i.e., dynamic compensation of convective mass flux. A hierarchy of experiments is conducted to demonstrate the effects of the artificial local compensation. The results of the mass compensation experiment show that the amplitude of the column mass change with the artificial local compensation is more sensitive to the change of the horizontal resolution between 3 and 27 km than the dynamic compensation. The results of the piggybacking tropical cyclone simulations at 9 km resolution suggest that the artificial local compensation in the Kain-Fritsch scheme (KF) concentrates vertical exchange of dry static energy and moisture and induces secondary circulation, which could lead to sea level pressure decrease and enhanced precipitation. These results indicate that the artificial local compensation at the gray-zone resolution could cause significant effects on tropical cyclone dynamics, so it is important to avoid the artificial local compensation for cumulus parameterization at such resolution. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75751
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan
Recommended Citation:
Ong H,, Wu C,-M,et al. Effects of artificial local compensation of convective mass flux in the cumulus parameterization[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(4)