加格达奇近38a气候变化特征分析

Climatic Change Features of Jiagedaqi area in Recent 38 Years

本文利用加格达奇气象观测站气温、降水、霜冻、积温和大风资料,对加格达奇有记录以来38 a的气候变化进行分析,结果表明:气温呈上升趋势,降水总趋势减少,20世纪90年代之后,气温异常偏暖的机率明显增加,积温增多明显,冬季增温幅度最大,霜期变化与全球变暖趋势基本一致,但是90年代之后,0℃终霜有拖后趋势,大风日数有明显减少的趋势,极端天气事件明显增多。

According to the date of the temperature, the precipitation, the frost, the accumulated temperature and the gale material from the record of 38 years in Jiagedaqi , the climate of the Jiagedaqi area is analyzed . The resuits show that the mean temperature appears to be going up and the precipitation appears to be descending, especially in the later 1990＇s, the warming trend increases obviously, the accumulated temperature increases obviously, especially the winter warming scope increases obviously, frost season change with global warming tendency basic consistent, but the end of the 1990＇s , 0℃ termination frost season has towed the tendency, the gale date number has the obvious reduced tendency, the violent weather event increases obviously.