DOI: 10.1029/2018JD028490
Scopus记录号: 2-s2.0-85052474613
论文题名: A Study of Cloud Microphysical Processes Associated With Torrential Rainfall Event Over Beijing
作者: Mao J. ; Ping F. ; Yin L. ; Qiu X.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 16 起始页码: 8768
结束页码: 8791
语种: 英语
英文关键词: cloud microphysical processes
; cold-frontal precipitation
; warm-sector precipitation
英文摘要: The evolution of mesoscale convective systems (MCSs) leading to a heavy rainstorm event that occurred in Beijing on 21 July 2012 was simulated using the Weather Research and Forecasting model. Observational analyses indicated that this event can be divided into an earlier-occurring warm-sector precipitation (WSP) and a later-occurring cold-frontal precipitation (CFP). Owing to the considerable differences in their ambient weather conditions, the features and evolution of the cloud microphysics were different. Diagnoses of the mass- and heat-hydrometeor budgets showed that the major differences in rainwater source were that the graupel melting (PGMLT) and the collection of snow by rain (PRACS_s2r) had similar magnitudes in the WSP, and PGMLT was larger than PRACS_s2r in the CFP, while the accretion growth of cloud droplets (PRA) was always the largest in both phases. The main cooling effect in the WSP was due to the evaporation of rainwater (PRE) and cloud water, while it was PRE and PGMLT for the CFP. The mechanisms of how microphysical processes influenced the precipitation were explored. It was found that the strong PRA in the WSP was conducive to the formation of a supercooled water level and evoked a seeding effect. However, graupel processes were crucial for the CFP. The strong sublimation processes of graupel and snow associated with the collection of droplets by graupel caused more latent heat release and drove airflow to reach a higher convection height. Moreover, the stronger PGMLT cooled the air in the MCS and reduced the effect of cloud droplet accretion growth. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113244
Appears in Collections: 气候减缓与适应
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作者单位: School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing, China; Key Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, China
Recommended Citation:
Mao J.,Ping F.,Yin L.,et al. A Study of Cloud Microphysical Processes Associated With Torrential Rainfall Event Over Beijing[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(16)