近百年北半球冬季大气活动中心的长期变化及其与中国气候变化的关系

THE LONG TERM CHANGE OF ATMASPHERIC AC TIVE CENTERS IN NORTHERN WINTER AND ITS CORRELATION WITH CHINA CLIMATE IN RECENT 100 YEAR

摘要: 研究了近110a北半球冬季6个主要大气活动中心的长期变化,检测其突变年份,划分了各自的阶段性。同时分析了大气活动中心与中国气候的关系,发现西伯利亚高压强度与中国冬季气温存在明显的负相关,北太平洋高压强度与中国冬季降水有较好的正相关。

Abstract: Byinvestig ating long-term change and periodic characteristics of six principal at mospheric active centers in the northern winter during recent 100 years,it was found that three climate abrupt changes in the 1920s,middle 1940s,middle and late 1970s respectively.Correlation analy ses shown that the winter temper ature in China during the past 100 years were closely negatively related to the intensity of Siberian high and better postive correl ation were observed between winter rainfall and the intensity of North Pacific high.