摘要
我国夏季主雨带的形成 ,是从上一年夏季开始的 ,共经历 3个阶段 :①上一年 5～ 9月副热带西风急流的孕育期 ;② 10～ 3月西风急流发展期 ;③西风急流为西太平洋副热带高压替代期 (本年 5～ 9月 )———主雨带形成。在 3个阶段中 ,北半球大气加热场上制约西风急流变化的最活跃的因子 ,是高、中纬地区由波状低云和冰雪盖交替进行的冷却大气过程。
This paper presents that main rain-band in summer in China is formed through three climatic stages. They are (1) preparation stage of Subtropical westerly jet (from May to September); (2) Development stage of jet from October to March; (3) the jet disappearing and replacing by west pacific subtropical high from May to September. Through all the process, the most active factor for forming west jet is to cool air mass alternately by low undulates clouds and Snow-ice Covers in high and mid latitude.
出处
《河南气象》
2001年第1期6-8,共3页
Meteorology Journal of Henan
关键词
夏季主雨带
副热带西风急流
西太平洋副热带高压
能量互补
中国
大气
Main rain-band in Summer
Subtropical westerly jet
West pacific Subtropical high
Energy complement each other in air
