我国不同海拔高度地区气温变化特征对比分析

Comparative Analysis of Temperature Characteristics at Different Altitudes in China

选取1981年1月-2017年12月共689个不同气象站点的日气温数据,综合分析我国不同海拔地区的气温变化特征。结果表明:最高气温、最低气温以及平均气温通过显著性检验的气温倾向率均为正值,表明全国气温整体变化趋势为增温,并在1998年后增温趋势最为明显;日较差通过显著性检验的基本为负值,表明在我国气温的年际变化及季节变化均为增温下,95%以上站点的最低气温增长率都要大于最高气温增长率;不同海拔高度的气温变化有程度差异,随着海拔高度的增加,最高气温、最低气温以及平均气温的气温倾向率随之增大,表明气温增长的速度加快,日较差下降幅度随之增加。

Based on the daily temperature data of 689 different stations from January 1981 to December 2017,the characteristics of temperature changes at different altitude areas of China were analyzed comprehensively.The results show that the highest temperature,the lowest temperature and the average temperature are significantly increased,which means that the trend of temperature change is warming,and the warming trend is the most obvious after 1998.The diurnal variation of temperature exhibits significant negative values,which indicates the interannual and seasonal variations are warming.In addition,the minimum temperature growth rate of more than 95%of the stations is greater than the maximum temperature growth rate.The temperature changes at different altitudes are different.With the increase of altitude,the temperature tendency rate of the highest temperature,the lowest temperature and the average temperature increases,indicating that the temperature growth rate accelerates and the daily range decreases.