中文摘要：

在收集南京市单一观测站点近50年气温资料和近30年浅层地温数据的基础上,对南京市地温变化趋势及其与气温变化的相关性进行了分析,对不同深度定时地温变化、日均地温全年变化、地温日较差变化等进行了比较,同时也对地温变化对城市浅层土工程性质可能带来的影响进行了分析。结果表明：地温场与气温场变化规律基本一致,但存在一定的滞后现象;南京市月均地温变化规律基本相同,最高值出现在7,8月份,最低值出现在1,2月份;近30年来浅层地温场总体呈现上升趋势,其中地表上升最大值达2.8℃,0-20cm土层温度变化幅度比较接近,上升最大值达2.0℃,40cm处最大值达1.75℃;30年来地表最大温差高达84.5℃,40cm深度最大地温差也超过27.5℃,因此多年地温变化对城市浅层土工程性质的影响不容忽视。

英文摘要：

Through collecting the measured data, including the atmospheric temperatures of recent 50 years and the ground temperatures at different depths of recent 30 years at an observation station in Nanjing city, the relationship of the ground temperatures with the atmospheric temperatures and the changing trend of ground temperatures are analyzed. The variations of ground temperatures, variation of daily mean ground temperatures and daily ranges of ground temperatures are also studied. The results show that, the ground temperature changes have a good ton＇elation with the atmospheric temperatures, however, with a lag. The change regularity of monthly mean ground temperatures of Nanjing city is basically similar, and the maximum values occur in July or August, and the minimum in January or Febnlary each year. In general, the ground temperatures increase gradually during the recent 30 years, with the maximum increment on the gTound surface of 2.8℃, at the 20 cm depth of 2.0 ℃ and at the 40 cm depth of 1.75 ℃. The greatest temperature difference on the surface reaches 84.5 ℃, and at the 40 cm depth reaches 27.5 ℃. Therefore, some possible influence due to ground temperature rising on the engineering geological properties of superficial soil layers inside the Nanjing city area can not he ignored.