乌鲁木齐夏季强降水过程GPS-PWV的演变特征  

Evolution Feature of Precipitable Water Vapor Derived from Ground-Based GPS during Summer Heavy Precipitation in Urumqi

作　　者：杨莲梅[1,2] 王世杰[1] 史玉光 赵玲[1] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [2]南京信息工程大学,江苏南京210044 [3]山东气象局,山东济南250031

出　　处：《高原气象》2012年第5期1348-1355,共8页Plateau Meteorology

基　　金：科技部公益性行业科研专项(GYHY201006012);国家自然科学基金项目(41075049);中央级科研院所基本科研业务费专项(IDM200802);中国气象局沙漠气象研究基金项目(Sqj2008001)共同资助

摘　　要：利用乌鲁木齐GPS观测站数据反演得到1h间隔GPS遥测的大气可降水量(GPS-PWV)和乌鲁木齐自动气象站逐时降水资料,分析了乌鲁木齐地区夏季10次中雨以上降水过程的GPS-PWV演变特征。结果表明,乌鲁木齐地区的强降水过程中GPS-PWV呈现出明显的1～3天增湿过程和1～2次跃变过程,且降水时GPS-PWV几乎约为气候平均值的2倍,跃变过程与降水发生和结束有较好的关系,可为干旱区降水短期预报提供一个明确的水汽演变指标。Based on the precipitable water vapor derived from ground-based GPS（GPS-PWV） and precipitation with 1 h interval from automatic weather stations,the evolution features of GPS-PWV during 10 heavy precipitation processes are analyzed.The result shows that GPS-PWV always appears evidently wetting process from one to three days and water vapor jumps once or twice before precipitation beginning.The GPS-PWV during the heavy precipitation almost is about twice of climatic value,its abrupt variation corresponds to beginning and ending of precipitation.So GPS-PWV can exhibit a clear index of water vapor evolution during the heavy precipitation in arid for short range weather forecast.

关 键 词：GPS遥测大气可降水量 强降水 乌鲁木齐 

分 类 号：P426.62[天文地球—大气科学及气象学]