河北唐山深层地温变化特征分析

Variation Characteristics of Deep Ground Temperature in Tangshan

为探明唐山深层地温变化特征,供研究农业生态环境变化参考,利用1981—2010年唐山国家基本气象站的0.8 m、1.6 m、3.2 m逐月平均地温资料,采用气候统计诊断分析方法,分析了近30年唐山深层平均地温的年、季变化趋势及气候异常、突变等气候特征。结果表明:唐山0.8 m、1.6 m、3.2 m四季和年平均地温均呈升温趋势,0.8 m深度秋季增温最弱,1.6 m深度春季增温最强;0.8 m和1.6 m平均地温夏季最高、冬季最低,3.2 m平均地温秋季最高、春季最低;0.8 m和1.6 m月平均地温最低和最高分别出现在2月和8月,3.2 m月平均地温最低和最高分别出现在3月和9月;春季、夏季、冬季和年平均地温经历了2个偏暖和2个偏冷阶段,而秋季则经历了2个偏暖和1个偏冷阶段;四季和年均存在突变现象;0.8 m春季和冬季平均地温及3.2 m年平均地温未出现异常年份,其余均出现了异常偏暖或偏冷。

The paper aims to explore the variation characteristics of deep ground temperature in Tangshan, and provide references for studying the change of agricultural ecological environment. Based on the monthly average ground temperature data at 0.8 m, 1.6 m and 3.2 m deep of Tangshan National Basic Observation Station from 1980 to 2010, the annual and seasonal variation trend, climatic anomalous characteristics and climatic abrupt change of deep average ground temperature during the 30 years were analyzed by using statistical diagnosis method. The results showed that： the annual average ground temperature at 0.8 m, 1.6 m and 3.2 m in Tangshan had an increasing trend, the increase was least at 0.8 m deep in autumn and the most at 1.6 m deep in spring; the average ground temperature was the maximum in summer and the minimum in winter at 0.8 m and 1.6 m, and was the maximum in autumn and the minimum in spring at 3.2 m. The monthly average ground temperature was the minimum in February and the maximum in August at 0.8 m and 1.6 m, and was the minimum in March and the maximum in September at 3.2 m. The average ground temperature in spring,summer, winter and of annual had experienced two warm and two cold stages, while it had experienced two warm and one cool stages in autumn. The four seasons＇ and annual average ground temperature had climatic abrupt change, except the average ground temperature in spring and winter at 0.8 m and the annual average ground temperature at 3.2 m, there were anomalous warm or cool phenomena in the average ground temperature.