中国物理B ›› 2014, Vol. 23 ›› Issue (6): 64210-064210.doi: 10.1088/1674-1056/23/6/064210

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Precipitation efficiency and its relationship to physical factors

周玉淑a, 李小凡b, 高守亭a   

  1. 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
  • 收稿日期:2013-07-30 修回日期:2013-10-14 出版日期:2014-06-15 发布日期:2014-06-15
  • 基金资助:
    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.

Precipitation efficiency and its relationship to physical factors

Zhou Yu-Shu (周玉淑)a, Li Xiao-Fan (李小凡)b, Gao Shou-Ting (高守亭)a   

  1. 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
  • Received:2013-07-30 Revised:2013-10-14 Online:2014-06-15 Published:2014-06-15
  • Contact: Li Xiao-Fan E-mail:xiaofanli@zju.edu.cn
  • Supported by:
    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.

摘要: 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.

关键词: precipitation efficiency, water-vapor convergence, convective available potential energy, cloud ratio

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.

Key words: precipitation efficiency, water-vapor convergence, convective available potential energy, cloud ratio

中图分类号:  (Effects of clouds and water; ice crystal phenomena)

  • 42.68.Ge
92.60.N- (Cloud physics and chemistry) 92.60.jf (Precipitation) 92.60.Wc (Weather analysis and prediction)