太阳活动对冬半年中高纬度欧亚范围内长期天气过程长度的影响

本文根据1949—1959十年来欧亚地区500毫巴长期天气过程的资料,研究冬半年各类天气过程的持续时间及其转变受太阳粒子流辐射的影响问题.粒子流辐射侵入地球区域的时间用我国佘山地磁台的资料来确定.结果指出,在太阳粒子流辐射加强时,一般可使欧亚地区经向过程延长,并使各类天气过程的转换表现出一定的方向.

THE INFLUENCE OF SOLAR CORPUS UPON THE DURATION OF LARGE-SCALE WEATHER PROCESS OF EURASIA DURING THE WINTER HALF-YEAR

Based on 10 years （1949—1959） data the influence of solar-activity on the duration of the large scale weather process over Eurasia is studied.The index of solar-activity used is the magnetic index observed at Zose,Shanghai,China.The chief results are as follows:when an intrusion of solar corpus with the intensity above certain critical value into the upper atmosphere occurs,that is to say the magnetic index of Zose suddenly increases to a critical value （the disturbed amplitude of magnetic horizontal component >120γ）,the duration of meridianal types of weather process of Eurasia is prolonged significantly and the anticyclonic circulation at 500 mb level over the area of Ural and Atlantic coast of west Europe is also intensified.The significance of this result is tes- tified by the method of 2×2 contingent table and X2 test.