东北地区近46年气候变化特征分析

利用东北三省70个基本气象站1961-2006年逐日平均气温,最高气温,最低气温,降水量,日照时数资料,分析了东北地区近46年的气候变化特征。结果表明：全区近46年平均气温线性增温速率为0.36℃/10 a,其中冬季增温最显著,其次为春季,秋季,夏季,地域特征表现为黑龙江省气温升高幅度最大,其次为吉林省,辽宁省。以19...

Characteristics of climate change in northeast China for last 46 years

Based on the daily average and extremum air temperature data from 70 meteorological stations in northeast China during 1961-2006,the characteristics of air temperature change in Northeast China were analysed.The results indicated that the annualmean air temperature increased by 0.36℃ per decade in Northeast China in the last 46 years,and the warming trend of seasons from high to low were winter,spring,autumn and summer.Geographically,warming trend in Heilongjiang Province was very significant,followed by Jilin Province and Liaoning Province.The whole years could be divided into two phrases by 1987: cold period(1961-1987),warm period(1988-2006).After significant warming process of later period in 1980,air temperature always kept continuous increase.The warming rate of minimum and maximum air temperature were respectively 0.51℃/10a and 0.24℃/10a,and the former was as many again as the latter.The precipitation had a slowly decreasing trend,and sunshine hours decreased by 0.11h per decade.