1957—2017年崇左市气温变化特征分析

Temperature Change Characteristics of Chongzuo City from 1957 to 2017

利用崇左国家气象观测站1957—2017年共61年的逐月平均气温资料,分析崇左市年平均气温以及春、夏、秋、冬四季平均气温的变化特征。结果表明,崇左市年平均气温整体呈显著上升趋势,气候倾向率为0.015 7℃/a,并在1990年发生向暖突变。春季增温速率最缓慢,秋季增温速率最快;夏、秋季的季平均气温上升趋势显著,对全年平均气温增加趋势的贡献大。近61年来,崇左市年均气温以5年以下的振荡周期为主,20世纪70—90年代呈现出8年及14年左右的周期变化,且以8年左右的周期变化最为显著。

Base on the monthly average temperature data of the Chongzuo National Meteorological Observatory during 1957-2017,the annual average temperature and the seasonal average temperature in spring,summer,autumn and winter were analyzed.The results showed that the annual average temperature in Chongzuo City showed a significant upward trend with the climate tendency rate of 0.015 7 ℃/a,and there was a sudden change of annual average temperature in 1990.The warming rate of seasonal average temperature was the slowest in spring and was the fastest in autumn.The seasonal average temperature in summer and autumn increased significantly,which contributed a lot to the rising of annual average temperature.In recent 61 years,the annual average temperature has been dominated by an oscillation period of less than 5 years.From the 1970s to the 1990s,it showed the oscillation period of 8 years and 14 years,and the 8 years was the most significant period.