【摘要】 利用临汾1962年~2007年0 cm~20 cm各层逐月平均地温,采用气候倾向率、滑动t检验等气候统计方法,研究了近46年临汾浅层平均地温的变化趋势、异常年份和气候突变等.结果表明:近46年来临汾各季节浅层平均地温均呈现为显著的变化趋势(-0.07℃/10 a~0.53℃/10 a),春季最大,夏季最小;各浅层年平均地温均呈明显的升高趋势,平均每10年升高0.15℃~0.26℃,以表层地温增温率最大;春季、秋季和年浅层平均地温表现为"暖—冷—暖"的变化趋势;浅层地温春季、冬季多异常年份,年平均地温异常偏高发生在2000年后,异常偏低发生在1996年;用滑动t检验法和Yam amoto法发现地温在1996年附近发生了突变,用M-k法发现地温在2002年附近发生了突变;气温升高是导致地温上升的主要原因.更多还原

【Abstract】 The variation trend,anomalous years and abrupt change of annual and seasonal mean soil temperature at shallow layers during the period of 1962~2007 in Linfen were investigated by using modern statistical diagnostic methods such as linear trend analysis,the moving t-test method.The main results are as follows:(1) in terms of linear trend,the seasonal mean soil temperature at shallow layers display a significant increasing trend in Linfen in past 46 years(-0.07 ℃/10 a~0.53 ℃/10 a),which is maximum in spring,minimum in summer;the annual mean soil temperature at shallow layers had a significant increasing trend,and the rising rate is 0.15 ℃/10 a~0.26 ℃/10 a,specifically at the depth of 0cm.(2) the change of mean soil temperature at shallow layers in spring,autumn and year has a "warm-cold-warm" trend.(3) the anomalous years of soil temperature at shallow layers in linfen mainly happens in spring and winter;The annual mean soil temperature was anomalously high after 2000,anomalous lower year occurred in 1996.(4) the abrupt change of soil temperature happens in 1996 with moving t-test and Yamamoto method,while in 2002 with Mann-Kendall method.(5) the increase of the soil temperature is mainly caused by the significant increase of air temperature.更多还原