1961—2013年内蒙古极端气温变化分析

文章选用全区均一性较好的71个地面气象站1961—2013年逐日最高和最低气温资料,给出了极端气温指标定义,计算分析了内蒙古极端气温事件时空变化特征。结果表明:1961—2013年内蒙古地区极端气温以极端高温事件增多、极端低温事件减少为主,但近几年这种变化有所减缓,主要表现在极端高温事件发生频率下降、极端低温事件发生频率明显上升。极端最低气温的变化趋势或幅度较极端最高气温明显。

Analysis on Extreme Temperature Change in Inner Mongolia from 1961 to 2013 Years

By used of daily maximum and minimum air temperature data that has better uniformity of 71 weather stations from 1961 to 2013 years, the definition of extreme air temperature index was given, the temporal and spatial variation change characteristics of extreme air temperature events was calculated and analyzed. It results showed that the extreme high temperature events increased, extreme low temperature events reduced in Inner Mongolia during 1961-2013. But this change has slowed in recent years, mainly in the frequency of extreme high temperature events decreased and the frequency of extreme low temperature events increased significantly. The variation trend and range were more obvious of extreme minimum temperature than extreme maximum temperature.