1981—2010年海口市浅层地温变化特征分析

采用线性趋势分析、滑动T-检验法、Mann-Kendall等方法分析海口市近30年浅层地温的变化特征及其与气候因子的响应关系。结果表明:近30年海口市浅层地温年平均呈正趋势变化,趋势率为0.18～0.34℃/10 a,浅层地温增温最大出现在冬季,增温率为0.46～0.62℃/10 a。浅层地温平均值在1998年发生突变,由一个相对偏冷期演变为一个偏暖期,平均值上升0.4～0.6℃,达到α=0.001的显著水平。气温、降水是影响浅层地温变化的主要气候因素。

Analysis on Change Characteristics of Shallow Soil Temperature in Haikou City from 1981 to 2010

With linear trend analysis,sliding T-test law and Mann-Kendall method,the paper analyzed change characteristics of shallow soil temperature and response relationship of climate factor in Haikou city nearly 30 years.The results showed that nearly 30 years average value of shallow soil temperature was positive trends change,trend rate of 0.18～0.34 ℃/10 a.Max warming of shallow soil temperature appeared in warming winter,and the warming rate was for 0.46～0.62 ℃/10 a.Shallow soil temperature average mutation occurred in 1998,consisted of a relatively cold period evolved into a relatively warm period,the average rose 0.4～0.6 ℃,reached significant levels of alpha=0.001.Air temperature and precipitation were the main climatic factors affecting shallow earth temperature change.