吉林省气温变化气候特征分析

Analysis of Climate Characteristics of Temperature Change in Jilin Province

利用吉林省1970~2009年日气温资料对吉林省气温变化气候特征进行分析,研究发现从空间分布来看,吉林省40年间年平均气温、春季、夏季平均气温均呈现出西高东低的分布特征,秋季、冬季则表现出南高北低的分布特征。从时间变化趋势来看,吉林省40年间年平均气温和春夏秋冬四季平均气温显著上升,并具有波动性。进一步对气温变化空间分布特征进行EOF分析表明,吉林省近40年间平均气温变化表现出明显的一致性,且平均气温呈现出明显的上升趋势。

Based on the temperature data of Jilin Province from 1970 to 2009, the climate characteristics of temperature change in Jilin Province were analyzed. According to the spatial distribution, the av-erage annual temperature, spring and summer average temperature in Jilin Province showed the distribution characteristics of high west and low east. In autumn and winter, it shows the distribu-tion characteristics of high south and low north. From the time trend, the average annual temper-ature in the 40 years of Jilin Province and the average temperature in the four seasons of spring, summer, autumn and winter have increased significantly and are volatile. Further EOF analysis of the spatial distribution characteristics of temperature changes shows that the average temperature change in Jilin Province has shown obvious consistency in the past 40 years, and the average temperature has shown a clear upward trend.