大理不同云系降水中GPS可降水量的变化特征  

Characteristics of GPS Precipitable Water Vapor during Precipitation Processes of Different Cloud Systems in Dali

作　　者：李育[1,2,3] 徐安伦 董保举[1,2,3] LI Yu;XU Anlun;DONG Baoju(Dali National Climate Observatory,Dali 671003,China;Dali Mountain Meteorological Field Experiment Base,China Meteorological Administration,Dali 671003,China;Dali Meteorological Service,Dali 671003,China)

机构地区：[1]大理国家气候观象台,大理671003 [2]中国气象局大理山地气象野外科学试验基地,大理671003 [3]云南省大理市气象局,大理671003

出　　处：《高原山地气象研究》2023年第1期90-94,共5页Plateau and Mountain Meteorology Research

基　　金：中国气象科学研究院基本科研业务费重点项目(2020Z006);国家自然科学基金面上项目(41875123);云南省科技厅科技计划项目(202305AM070004)。

摘　　要：通过对比中日合作JICA项目2010~2014年大理地基GPS反演的大气可降水量资料与同期降水数据,选取积状云、层状云和层积混合云产生的降水三类样本,分析了大气可降水量(Precipitable Water Vapor,PWV)在三类典型降水过程中的变化特征。结果表明:PWV在层状云降水前有持续大幅度增长,降水趋于结束阶段,出现持续下降。PWV在积状云降雨时有快速大幅跃升,强降水时段与PWV峰值出现时间基本一致。PWV在层积混合降水中,兼具层状云和积状云时的特征,且持续处于高位运行。PWV在上述三类性质降水中表现出的异常特征可为降水的短时临近预报预警提供参考。Based on the atmospheric precipitable water vapor(PWV)data retrieved by ground-based GPS in Dali from 2010 to 2014 of the JICA project of China-Japan cooperation,a comparison was made with the precipitation data in the same period.According to pre-cipitation features,the PWV variations for three precipitation types generated by cumuliform clouds,stratiform clouds,and stratiform clouds with embedded convection were analyzed.The results show that the PWV continued to increase significantly before stratiform cloud precipitation,and continued to decrease when the precipitation approached the end stage.The PWV had a rapid and large jump dur-ing the cumuliform cloud precipitation,the time of heavy precipitation was basically consistent with the peak of the PWV.The PWV dis-played the characteristics of both stratiform and cumuliform cloud precipitation,and sustained to operate at high-level during the strati-form clouds with embedded convection precipitation.The anomalous characteristics of the PWV in the above three types of precipitation can provide a reference for short-term forecast and early warning of precipitation.

关 键 词：大气可降水量 不同云系 变化特征 大理 

分 类 号：P426.6[天文地球—大气科学及气象学]