摘要
运用１９９８年６～８月逐日逐时ＧＭＳ辐射亮度温度ＴＢＢ资料，统计和分析了长江 流域４个大暴雨时段中各自中尺度对流云团活动的一些主要特征，指出长江流域的这场罕见 大水是在特定的环流形势下，由３１５个β中尺度和α中尺度对流云团直接造成的。与此同 时，对７月２１～２２日发生在武汉及其以东黄冈地区的特大暴雨作了较详细的分析，发现它 是由４次强对流云团形成发展及向西传播造成的，并指出低空强西南风急流与切变线及特定 的地形条件是对流云团形成和发展的根本原因。
The mainly features of mesoscale convective cloud clusters during four heavy rainfall stages in Changjiang River Basin have been studied by using GMS TBB data of every hour on every day from June to August in 1998. The main conclusions have been made as follows : the severe heavy rainfall in Changjiang River Basin was directly caused by 315 meso-β and meso-α convective cloud under special weather situation. At the same time, the very heavy rainfall on 21 - 22 July in Wuhan city and Huanggan in the eastern Hubei Province has been studied and we found that it is brought by the initiation, development and propagation of four heavy convective cloud clusters. The fundamental reasons of which are strong southwest jet and shear line at 850 hPa as well as special terrain condition.
出处
《气候与环境研究》
CSCD
2000年第3期279-286,共8页
Climatic and Environmental Research
基金
"1998年汛期特大暴雨成因及机理分析研究"课题
