太原市近50年气候变化特征

The Features of 50 Years’Climatic Changes of Taiyuan City

根据太原市1954—2003年50年的资料,用气候统计方法分析了气温、地温、冻土、降水量等气象要素的变化。结果表明:太原市年平均气温逐年上升,21世纪初的年平均气温较50年前上升近2.0℃;各层地表温度年平均值较50年前也有所增加;冻土层退缩变浅;近40年来年降水量平均逐年减少近40mm。

According to the data of 50 years(1954-2003) of Taiyuan City, and by using the climatic statistical method, this paper analyzes on the variations of the meteorological elements such as the atmospheric temperature, the ground temperature, the frozen soil, and the precipitation, etc., the results of which show that the annual average atmospheric temperature of Taiyuan City is going up year by year, the annual average atmospheric temperature in the early 21st century is rising by 2.0 ℃ appropriately than that of 50 years ago, and the annual average ground temperature also has some increases comparing with that of 50 years ago, and the frozen soil layer has held back shallowed, and the annual precipitation is reduced by 40 mm in 40 years on an average.