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Chin. Phys. B, 2014, Vol. 23(6): 064210    DOI: 10.1088/1674-1056/23/6/064210
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Precipitation efficiency and its relationship to physical factors

Zhou Yu-Shua, Li Xiao-Fanb, Gao Shou-Tinga
a Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
b Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China
Abstract  The precipitation efficiency and its relationship to physical factors are examined by analyzing a two-dimensional cloud-resolving model simulation during TOGA COARE in this study. The basic physical factors include convective available potential energy, water-vapor convergence, vertical wind shear, cloud ratio, sea surface temperature, air temperature, and precipitable water. Precipitation efficiencies do not show a close relationship to air temperature nor to sea surface temperature nor to precipitable water. The precipitation efficiency increases as the water-vapor convergence rate increases and vertical wind shear weakens, whereas it decreases as the convective available potential energy dissipates and anvil clouds develop.
Keywords:  precipitation efficiency      water-vapor convergence      convective available potential energy      cloud ratio     
Received:  30 July 2013      Published:  15 June 2014
PACS:  42.68.Ge (Effects of clouds and water; ice crystal phenomena)  
  92.60.N- (Cloud physics and chemistry)  
  92.60.jf (Precipitation)  
  92.60.Wc (Weather analysis and prediction)  
Fund: Project supported by the National Basic Research Program of China (Grant No. 2014CB441402), the National Natural Science Foundation of China (Grant Nos. 41275065, 41075044, and 41075043), and the 985 Program of Zhejiang University.
Corresponding Authors:  Li Xiao-Fan     E-mail:  xiaofanli@zju.edu.cn

Cite this article: 

Zhou Yu-Shu, Li Xiao-Fan, Gao Shou-Ting Precipitation efficiency and its relationship to physical factors 2014 Chin. Phys. B 23 064210

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