近50a陕西省冬季气候变化特征及其与北半球大气环流的关系  

THE FEATURES OF CLIMATE CHANGE IN WINTER OVER SHANXI PROVINCE DURING THE LAST 50 YEARS AND ITS RELATION WITH THE CIRCULATION SYSTEMS OF 500 hPa IN NORTHERN HEMISPHERE

作　　者：白爱娟[1] 方建刚[2] 

机构地区：[1]南京气象学院大气科学系,南京210044 [2]陕西省气象台,西安710015

出　　处：《气象科学》2003年第2期176-184,共9页Journal of the Meteorological Sciences

基　　金：国家自然科学基金 ( 40 2 75 0 2 8)资助

摘　　要：通过对陕西省近 5 0a来冬季气温和降水资料的分析 ,研究了陕西省冬季气候变化特征 ,同时分析了气象要素变化与北半球大气环流异常的关系 ,指出 :陕西省冬季降水量在 70年代末 80年代初开始持续偏少 ,尤其是在 90年代 ,但是减少的趋势不显著 ;冬季气温从 1975年开始具有显著的上升趋势 ,90年代气温持续偏高。降水减少和气温升高是陕西省近半个世纪以来气候变化的主要特征 。According to the data of temperature and precipitation in Shanxi Province during the past half century, we analyse the features of climate change in ShaInxi:Rainfall has slightly decreased since the end of 1970's;while the temperature has obviously increased from 1975 and especially much higher in 1990's .The relation between the climate change and the circulation systems over Northern Hemisphere are detected: if the East Asian Trough and Ural Mountains High are strengthening at the same time, then the rainfall inclines to be much more than the means, and the temperature will begin to go up.On the contrary,if the East Asian Trough and Ural Mountains High are weakening at the same time, then the rainfall inclines to be less than the means, and the temperature will begin to come down.

关 键 词：气候变化 大气环流 趋势系数 

分 类 号：P463[天文地球—大气科学及气象学]