【摘要】 对杭州１９９７年７月持续性暴雨期的相关物理量作了计算和形势分析，研究了物理量对梅雨锋上暴雨所起的作用．结果表明，大气环流的调整、副高强度的明显变化、高低空急流的耦合作用、低层辐合高空强辐散的配置以及切变线上不断有中小尺度系统的生消东移，与暴雨的形成—持续—结束有较好的对应关系更多还原

【Abstract】 The some physical element fields calculated and the general circulation often play an important role during heavy rainfall on Mei yu front.The long lasting heavy rainfall over Hangzhou region in July of 1997 was analysed and researched.The result showed that some processes,including the adjustment of the general circulation,the marked changing of the intensity of sub tropical anticyclone over the West Pacific Ocean,the coupling action between the high and low level jets,the lower convergence and the upper strong divergence associated,and the mesoscale and miliscale system which are continuously developing and declining and moving toward east along with the low level shear line,are much responsible to the formation lasting end of the long lasting heavy rainfall.更多还原