摘要
应用云南大理地基GPS观测站的数据反演得到的1h间隔GPS大气可降水量资料和自动气象站逐时降水资料,分析了云南大理地区4次暴雨过程的GPS大气可降水量的演变特征.结果表明,云南大理地区的暴雨天气过程中GPS大气可降水量呈现明显的1～2天的增湿过程和1～2次跃变过程,跃变过程与降水发生和结束有较好的关系,可为短期预报提供一个明确的水汽演变指标.
Based on the precipitation with l h interval from automatic weather stations, the evolution features of the precipitable water vapor derived from ground - based GPS during 4 rainstorm processes are analyzed. The result shows that the precipitable water vapor derived from round -based GPS always appears evidently wetting process from one to two days and water vapor jumps once to twice before precipitation beginning. The precipitable water vapor derived from ground -based GPS during the rainstorm abrupt variation corresponds to beginning and ending of precipitation. So the precipitable water vapor derived from ground - based GPS can exhibit a clear index of water vapor evolution during the rainstorm in arid for short range weather forecast.
出处
《云南地理环境研究》
2013年第5期79-83,共5页
Yunnan Geographic Environment Research
基金
云南省气象局预报员技术开发专项(YB201210)
中国气象局行业专项(GYHY201006054)共同资助
关键词
地基GPS
水汽
暴雨
ground - based GPS
rainstorm
vapor
