The Seasonal and Interannual Variation of Diurnal Precipitation over the Tibetan Plateau and Its Downstream Regions Observed by the Tropical Rainfall Measuring Mission  

作　　者：HU Liang DENG Di-Fei GAO Shou-Ting LI Yao-Dong 

机构地区：[1]State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences [2]Institute of Atmospheric Physics, Chinese Academy of Sciences [3]Beijing Aviation Meteorological Institute

出　　处：《Atmospheric and Oceanic Science Letters》2015年第6期365-370,共6页大气和海洋科学快报（英文版）

基　　金：funded by the Third Scientific Experiment of the Tibetan Plateau(Grant No.GYHY201406001);the National Natural Science Foundation of China(Grant Nos.41175046,41205030,and 4140050174);an open funding from the State Key Laboratory of Severe Weather(Gran No.2013LASW-A06);Institute of Plateau Meteorology,China Meteorological Administration(Grant No.LPM2011017)

摘　　要：Using nine years of Tropical Rainfall Measuring Mission(TRMM)2A25 data,based on the probability density function of rainfall,a comparative analysis of the diurnal cycle and its seasonal and interannual variation for convective rain,stratiform rain,and total rain is made between the Tibetan Plateau and the downstream Yangtze River basin and East China Sea.The diurnal convective rain is stronger than the diurnal stratiform rain over the Yangtze River basin,and the convective rain peaks in the afternoon when the stratiform rain maximum happens in the early morning.Convective rain and stratiform rain both peak in the early morning over the East China Sea.The diurnal total rain over the Tibetan Plateau is stronger than its downstream regions.The diurnal cycle appears quite different among the four seasons over the Yangtze River basin,and the seasonal variation of diurnal convective rain is more apparent than diurnal stratiform rain.The seasonal variation of the diurnal cycle is weak over the East China Sea and Tibetan Plateau.The maximum of total rain happens in the afternoon during1998–2002 over the Yangtze River basin,while it peaks in the early morning during 2003–2006,but no obvious phase differences can be found among years in the diurnal rain over the East China Sea and over the Tibetan Plateau.Using nine years of Tropical Rainfall Measuring Mission(TRMM)2A25 data,based on the probability density function of rainfall,a comparative analysis of the diurnal cycle and its seasonal and interannual variation for convective rain,stratiform rain,and total rain is made between the Tibetan Plateau and the downstream Yangtze River basin and East China Sea.The diurnal convective rain is stronger than the diurnal stratiform rain over the Yangtze River basin,and the convective rain peaks in the afternoon when the stratiform rain maximum happens in the early morning.Convective rain and stratiform rain both peak in the early morning over the East China Sea.The diurnal total rain over the Tibetan Plateau is stronger than its downstream regions.The diurnal cycle appears quite different among the four seasons over the Yangtze River basin,and the seasonal variation of diurnal convective rain is more apparent than diurnal stratiform rain.The seasonal variation of the diurnal cycle is weak over the East China Sea and Tibetan Plateau.The maximum of total rain happens in the afternoon during1998–2002 over the Yangtze River basin,while it peaks in the early morning during 2003–2006,but no obvious phase differences can be found among years in the diurnal rain over the East China Sea and over the Tibetan Plateau.

关 键 词：DIURNAL cycle CONVECTIVE RAIN STRATIFORM RAIN Tibe 

分 类 号：P426.6[天文地球—大气科学及气象学]