67年来济南最高和最低气温变化特征

Characteristics of the Highest and Lowest Temperature Changes in Jinan in 67 Years

选取济南市1951—2017年逐日气温观测资料,采用线性统计、距平分析等方法,分析了67年来济南最高、最低气温的变化趋势。结果表明,近67年来济南最高和最低气温均呈上升趋势,其增温速率分别是0.080、0.288℃/10 a,最低气温增温显著,气候变暖现象主要以最低气温增温为主。秋季、冬季、春季的最高气温以及四季的最低气温都有一定程度的上升,秋季、冬季和春季变得相对温暖,夏季的最高气温有所减低。20世纪80—90年代为主要增温期,21世纪初最高、最低气温均有一定程度下降。

The daily temperature observation data from 1951 to 2017 in Jinan City were selected, and the trend of the highest and lowest temperature in Jinan in 67 years was analyzed by linear statistics and anomaly analysis.The results showed that in the past 67 years, the highest and lowest temperature in Jinan had shown an upward trend, and their increase rates were 0.080 and 0.288 °C/10 a, respectively, and the lowest temperature increase was significant.The phenomenon of climate warming was mainly based on the minimum temperature increase.The highest temperatures in autumn, winter and spring and the lowest temperatures in the four seasons had risen to some extent, and autumn, winter and spring had become relatively warm, and the highest temperatures in summer had decreased.In the 1980s and 1990s, the main warming period was observed. At the beginning of the 21st century, the highest and lowest temperatures all declined to some extent.