DOI: 10.1002/2017JD027734
Scopus记录号: 2-s2.0-85047494778
论文题名: Sensitivity of a Simulated Squall Line During Southern China Monsoon Rainfall Experiment to Parameterization of Microphysics
作者: Qian Q. ; Lin Y. ; Luo Y. ; Zhao X. ; Zhao Z. ; Luo Y. ; Liu X.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 8 起始页码: 4197
结束页码: 4220
语种: 英语
英文关键词: cold pool
; microphysics scheme
; rain evaporation
; SBU-YLIN scheme improvement
; squall line length
Scopus关键词: cloud microphysics
; cold pool
; evaporation
; experimental study
; isotherm
; monsoon
; parameterization
; rainfall
; relative humidity
; sensitivity analysis
; snow
; squall line
; weather forecasting
; China
英文摘要: A squall line on 22 May 2014 during the Southern China Monsoon Rainfall Experiment period is simulated with four bulk microphysical parameterizations (BMPs) using the Weather Research and Forecasting (WRF) model. Although most BMPs are able to capture the basic features of the squall line, the movement, morphology, and especially the length of the simulated squall lines differ significantly among BMPs. Morrison scheme tends to simulate a slower moving squall line with a weaker cold pool and better trailing stratiform cloud and precipitation due to the smaller snow fall speed and faster generation of snow particles than other schemes. Assuming hail or graupel in different schemes could result in different melting profiles of rimed-ice particles, with hail melted substantially below the 0°C isotherm and contributing to the cold pool production significantly in WRF double-moment six-class microphysics scheme because of its use of larger fall speed for hail. Although ice-phase particles simulated differ significantly among BMPs, it is rain evaporation that dominates the cold pool generation and maintenance of the squall line in this case. Stronger rain evaporation generally contributes to stronger cold pools and thus faster movement and longer simulated squall lines. Failure of the Stony Brook University-YLin scheme in capturing the squall line was identified to be related to the turnoff of rain evaporation once environmental relative humidity is larger than 90%. With modifications of rain evaporation calculation and saturation adjustment method, the scheme is able to simulate this squall line reasonably well. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114064
Appears in Collections: 气候减缓与适应
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作者单位: Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, and Joint Center for Global Change Studies (JCGCS), Tsinghua University, Beijing, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China
Recommended Citation:
Qian Q.,Lin Y.,Luo Y.,et al. Sensitivity of a Simulated Squall Line During Southern China Monsoon Rainfall Experiment to Parameterization of Microphysics[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(8)