青藏高原那曲地区雨季雷达回波、降水和部分热力参量的统计特征  

The Statistic Characteristics of Radar Echo and Precipitation and Some Thermodynamic Variables in Qinghai-Xizang Plateau

作　　者：冯锦明[1] 刘黎平[2] 王致君[1] 楚荣忠[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 [2]中国气象科学研究院,北京100081

出　　处：《高原气象》2002年第4期368-374,共7页Plateau Meteorology

基　　金：国家自然科学基金项目 (4 9875 0 0 2 ) ;中国科学院知识创新工程项目 (2 10 0 41)共同资助

摘　　要：利用 1998年青藏高原地面雷达资料、探空资料和地面降水资料 ,计算分析了青藏高原的雷达回波、层结热力参量及其降水的统计特征。结果表明 ,在 6月中旬青藏高原雨季来临之后 ,云中对流活动明显增强 ,雷达回波强度增大 ,回波顶高和回波面积增加 ,层结热力参量明显改变 ,对流凝结高度下降 ,气块能量增加 。Using Doppler radar data, sounding data and precipitation data of Qinghai Xizang Plateau in 1998, we calculated and analyzed the statistic characteristics of radar echo andsome thermodynamic variables and precipitation in Qinghai Xizang Plateau. After monsoon onset in the middle of June in Qinghai Xizang Plateau, the convective activity strengthens distinctly in cloud. According to the diurnal variation, the intensity of convective activity in cloud attains to the maximum at 02:00 of local time approximately. The reflectivity and area and top of radar echo augments greatly since monsoon. The precipitation also increases greatly. Some thermodynamic variables is distinctly altered. The convective condensation level decreases and parcel energy increases generally.

关 键 词：青藏高原 那曲地区 地面雷达 探空 地面降水 雷达回波 热力参量 

分 类 号：P426.62[天文地球—大气科学及气象学] P412.25