摘要
本文指出,在六月和十月北半球大气环流都有一次非常剧骤的变化.在六月大气环流变化的特点表现在东西风带突然向北推移.在高空东西凤带推移的时期,高空的流型也发生很大的改变.经过这次变动以后,便建立典型的夏季环流型式.在十月高空的东西风带突然向南推移,同时高空的流型相应也发生一次大变化.在这次变化之后,高空的流型便属典型的冬季环流型式了.在夏季环流开始出现时,印度的西南季风开始爆发,中国和日本的梅雨季节便开始,同时内热带的辐合区(ICZ)突然向北推进.而在冬季环流开始时,印度的西南季风和内热带辐合区便向南撤退.此外,在本文中还叙述了在这两次变化时期的天气过程.
In this paper we have shown that there is an abrupt change of upper-air circulation over Northern Hemisphere in June and October.In June the abrupt change is characterized by a sudden northward shift of westerlies and easterlies.With this there is a big change in upper flow pattern.After this variation the typical summer circulation is established.In October the abrupt change is characterized by a sudden southward shift of westerlies and easterlies.This is also accompanied by a marked variation in upper flow pattern.After this variation the typical upper winter circulation is established.With the onset of summer circulation is the outburst of SW monsoon in India and of Mai-yü in China and Japan and a rapid northward rush of the intertropical convergence zone(ICZ).With the onset of winter circulation is the retreat of SW monsoon and ICZ.The synoptic sequence of these developments are described.
作者
葉篤正
陶诗言
李麥村
YEH TU-CHENG;DAO SHIH-YEN;LI MEI-TSIUN(Institute of Geophysics and Meteorology,Academia Sinica)
出处
《气象学报》
1958年第4期249-263,共15页
Acta Meteorologica Sinica
