近50年三江-长白区气候变化特征分析

Feature Analysis of Weather Change in Recent 50 Years in the Area of Sanjing-Changbai

采用国家气象信息中心气候资料室近50 a来平均气温、平均最高气温、平均最低气温、相对湿度、降水量、降水日数、平均风速和日照时数8个气象要素的年统计值,建立一元线性回归方程并求出回归系数b(倾向率)和相关系数r(趋势系数)分析其变化规律以及各要素之间的相关性。结果表明,近50年三江-长白区气候明显变暖;区域干湿状况由湿润向半湿润发展;平均风速、日照时数总体呈减少趋势,但区域内各地的差异较大。

According to annually statistic value of eight essential elements for the last 50-year weather data,which were average temperature,average high temperature,average low temperature,relative humidity,amount of precipitation,days of precipitation,average wind speed and hours of sunlight,a one-dimensional linear regression equation was built,and the regression ratio b（tendency rate） and related ratio r（trend coefficient） were calculated to analyze the regular pattern and the relationship between each elements.The results showed that the warming trend was obvious in the area of Sanjiang-Changbai,the development was from humidification to half-humidification.The average wind speed and hours of sunlight showed a decreasing trend,and the difference was great in different locations in Sanjiang-Changbai Area.