1993年初夏中国东部沿海爆发性气旋形成条件的数值模拟试验

SIMULATION ON FORMATION PREREQUISITES OF EXPLOSIVE CYCLONE OF EARLY JUNE 1993

中文关键词:  爆发性气旋  南北低槽合并  强水汽通道

英文关键词:Explosive cyclone  Low trough merge  Low-level vapor transport channel

中文摘要:

      文中利用PSU/NCAR中尺度模式MM4对1993年6月初发生在中国东部沿海地区的一次爆发性气旋进行了数值试验。结果表明:初夏季节在中国东部沿海气旋爆发性发展必须具备下面两个条件:(1)高空南北支急流中分别存在发展的低槽系统,北部低槽伴有冷空气,南部低槽伴随有强暖湿空气,两低槽在中国东部沿海合并后形成一个深槽,引起地面气旋爆发性发展;(2)东部沿海对流层低层形成一个强水汽通道,这个水汽通道将携带的大量和能量的暖湿空气向气旋爆发地区输送。

英文摘要:

      In this paper,the PSU/NACR MM4 model are employed to investigate the prerequisite conditions to a explosive cyclone which happened in June 1-2 1993 at Yellow Sea.Several smoothing testare conducted and the result shows that the merge of the troughs associated with the northern cold airand the southern moistjet,the strong low-level moisture transport channel are two indispensable factors to the explosivecy clone development which happens in China's eastern coastal area in early summer.