摘要
利用合成方法对３次西南涡过程的流场、温湿场和涡度场等结构进行了分析。结果指出：沿切变线存在风场的中尺度扰动，低涡的尺度为２５０—３００ｋｍ。中低层有两支不同性质的气流流入低涡区，降水主要发生在低涡移动方向右侧的两象限。温湿场和铅直流场在低涡区呈现明显的不对称分布。
By using composite method,the three cases of low vortex occurring along the Yangtze River valley are presented in this paper Structures of airflow vertical motion,temperature,humidity fields are analysed The analyses indicate that there is a series of wave along the shear line in the mesoscale wind field and the low vortex wave-length is 250 300km The low vortex is a baroclinic system and the heavy rain usually occurring on its right side
出处
《高原气象》
CSCD
北大核心
1996年第4期456-463,共8页
Plateau Meteorology
