Rain Microphysical Budget in the Tropical Deep Convective Regime: A 2-D Cloud-Resolving Modeling Study

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  • Xiaofan LI
    Department of Earth Sciences, Zhejiang University, Hangzhou, Zhejiang, China
  • Xinyong SHEN
    Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China

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 The rain microphysical budget associated with precipitation in the tropical deep convective regime is investigated through the analysis of grid-scale data from a 1.5-km-mesh two-dimensional cloud-resolving model simulation forced by large-scale forcing from tropical ocean global atmosphere coupled-ocean atmosphere response experiment. The rain grids are partitioned into several types based on the rain microphysical budget, and relationships between rainfall types and vertical profiles of vertical momentum, water vapor, and cloud hydrometeors are examined. Over 67% of the total rainfall is associated with the net rain source, in which the collection of cloud water by rain is greater than the melting of precipitation ice to rain in the presence of upward motions throughout the troposphere. Over 26% of the total rainfall is related to downward motions in the lower troposphere, leading to the melting of precipitation ice as a major term in the production of precipitation. About 15% of the total rainfall corresponds to dynamic hydrometeor advection only.

収録刊行物

  • 気象集誌. 第2輯

    気象集誌. 第2輯 91 (6), 801-815, 2013

    公益社団法人 日本気象学会

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