1951—2005年内蒙古东部气候变化特征分析

Climate change characteristics of Eastern Inner Mongolia from 1951 to 2005

选取1951—2005年内蒙古东部4盟市48个地面气象观测站的地面气象观测资料,采用趋势分析法分析了内蒙古东部地区气温、降水、风速和日照时数的变化趋势及空间分布特征。结果表明:近50 a来内蒙古东部地区气温升高,且极端最低气温升高的程度大于极端最高气温升高的程度;呼伦贝尔东部和赤峰西南部降水增加较明显,通辽降水减少最明显;平均风速变小,仅通辽呈风速增大的趋势;日照时数与降水量的变化趋势相反。

Based on the meteorological data of 48 weather stations from 1951 to 2005 in the eastern Inner shine duration were analyzed by trend analysis method. The results show that air temperature in the eastern Inner increases during recent 50 years, and the increase of extreme minimum temperature is higher than that of extreme maximum temperature. Precipitation increases obviously in the eastern Hulunbeier and the southwestern Chifeng, while it decreases obviously in Tongliao. The mean wind speed decreases except Tongliao. The changes of sunshine duration and precipitation are contrary.