摘要
利用常规资料、HLAFS格点资料、GMS云图等资料 ,对形成 1 998年长江上游 8次洪峰的有关强降雨天气过程的影响天气系统、暴雨形成的物理机制以及中低纬度天气系统之间的相互作用和影响进行了初步分析和诊断。结果表明 ,多次强暴雨过程发生在欧亚中高纬度双阻型或中阻型、中低纬度强越赤道气流、异常活跃的西南季风大尺度环流背景下 ;生成在青藏高原东部在四川盆地发展的低涡及与其相连的切变线是暴雨产生的主要的天气系统 ;暴雨的加强与中低纬度系统相互作用、高原涡的特殊结构密切相关。
By using conventional observation data, HLAFS grid data and GMS cloud data, physical mechanism affecting weather system and rain formation, interaction and inter impact between low and middle latitude weather system are analyzed and diagnosed. The results indicate that several strong rain procedures occur in the large scale background of middle high latitude in Eurasia. The low eddy which forms in the east area of Qingzang plateau and develops in the Sichuan Basin and its shear line are the main weather systems. The rain intensification is closely related with interaction between middle and low latitude systems, specific construction of plateau eddys.
出处
《气象》
CSCD
北大核心
2001年第8期9-14,共6页
Meteorological Monthly
