Precipitation efficiency and its relationship to physical factors

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 avail- able potential energy, water-vapor convergence, vertical wind shear...

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Published inChinese physics B Vol. 23; no. 6; pp. 260 - 265
Main Author 周玉淑 李小凡 高守亭
Format Journal Article
LanguageEnglish
Published 01.06.2014
Subjects
Anvil clouds
COARE
Convergence
Dissipation
Physical factors
Potential energy
Precipitation
Sea surface temperature
Wind shear
垂直风切变
对流有效位能
沉淀效率
海表面温度
物理因素
空气温度
降水效率
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/23/6/064210

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Summary: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 avail- able 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 tem- perature 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.
Bibliography:Zhou Yu-Shu, Li Xiao-Fan , Gao Shou-Ting（ 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
precipitation efficiency, water-vapor convergence, convective available potential energy, cloud ratio
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 avail- able 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 tem- perature 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.
11-5639/O4
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SourceType-Scholarly Journals-1
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content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/6/064210