SENSITIVITY OF PRECIPITATION TO SEA SURFACE TEMPERATURE AND ITS DIURNAL VARIATION:A PARTITIONING ANALYSIS BASED ON SURFACE RAINFALL BUDGET

作     者：周玉淑 李小凡 

作者机构：Laboratory of Cloud-Precipitation Physics and Severe Storms(LACS)Institute of Atmospheric PhysicsChinese Academy of Sciences NOAA/NESDIS/Centre for Satellite Applications and ResearchCamp SpringsMarylandUSA 

出 版 物：《Journal of Tropical Meteorology》 (热带气象学报（英文版）)

年 卷 期：2012年第18卷第3期

页      面：369-376页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：State Key Development Program for Basic Research of China (2009CB421505) Projects of the Natural Science Foundation of China (41075044 41075079) 

主　　题：precipitation statistics sea surface temperature(SST) diurnal variation equilibrium cloud-resolving model simulation 

摘      要：The sensitivity of precipitation to sea surface temperature(SST) and its diurnal variation is investigated through a rainfall partitioning analysis of two-dimensional cloud-resolving model experiments based on surface rainfall *** all experiments,the model is set up using zero vertical velocity and a constant zonal wind and is integrated over 40 days to reach quasi-equilibrium *** 10-day equilibrium grid-scale simulation data and a time-invariant SST of 29°C are used in the control *** the sensitivity experiments,time-invariant SSTs are 27°C and 31°C with an average value of 29°C when the minimum and maximum values of diurnal SST differences are 1°C and 2°C,*** results show that the largest contribution to total rainfall is from the rainfall with water vapor convergence and local atmospheric drying and hydrometeor gain/divergence(~30%) in all *** SST increases from 27°C to 29°C,the contribution from water vapor convergence *** increase of SST reduces the contribution of the rainfall with water vapor convergence primarily through the decreased contribution of the rainfall with local atmospheric drying and hydrometeor gain/divergence and the rainfall with local atmospheric moistening and hydrometeor loss/*** inclusion of diurnal variation of SST with the diurnal difference of 1°C decreases the rainfall contribution from water vapor convergence primarily through the decreased contribution of the rainfall with local atmospheric moistening and hydrometeor loss/*** contribution of the rainfall from water vapor convergence is barely changed as the diurnal difference of SST increases from 1°C to 2°C.