| Climate change feature in recent 45 years in Taiyuan is studied in detail by using the climatic data collected from typical meteorological stations in Qingxu in mountain area and Yangqu in plain area in Taiyuan from 1961～2005.The results show:(1) The annual precipitation in mountain and plain areas are both in a decreased trend in recent 45 years because of the decreased precipitations in spring and autumn,while the annual mean temperature in both areas increase significantly mainly because of the increase of mean temperature in spring and winter.The mean minimum temperature in every season increases more significantly than the mean maximum temperature,so it is certain that temperature in evenings has increased notably.1986 and 1993 are separately the years of turn of annual mean temperatures in mountain and plain areas,and after the winter of 1985/1986,mean temperature in winter has occurred abrupt change.With climate warming in Taiyuan,the arid trend is more and more severe.(2) In recent 45 years,the number of severe cold winters and severe warm winters in mountain area are more than that in plain area,and the number of severe rainless years is less than that in plain area,but the severe rainless years in mountain area have bigger annual precipitation anomalies,while the annual precipitation anomalies are smaller in severe rainless years in plain area.In recent 45 years,climate in Taiyuan has experienced the changes of abnormality to stationary and to abnormality,which is more significant in plain area. |