广州市室内地温的变化规律分析

对2012年2月—2014年2月间广州室内地温进行了分析，同时还分析了其与室外气温的相互关系，结果表明：室内日平均地温随月份的变化呈正弦曲线变化，并且其变化与室外平均气温的变化有很高的相关性，但室内地温的升降幅小于室外气温的升降幅，春夏季室外气温高于室内地温，而秋冬季节相反；室内地温的日较差通常很小，一般小于1℃；当室内地温日较差在1～2℃时，多是室外处于持续的升温或持续降温状态；当室内地温日较差大于2℃时，多是因受冷空气影响。有冷（暖）空气影响时，室内地温下降（上升）较室外气温有一定程度的滞后，室内地温下降（上升）幅度较小但保持一致下降（上升）趋势，二者日平均温度变化趋势较为一致。

Analysis of the Variations of Indoor Ground Temperature in Guangzhou City

The indoor ground temperature （IGT） and its relationship with the outdoor air temperature （OAT） are analyzed for the time from February 2012 to Fe daily mean IGT varies by the sine curve with the change bruary 2014. The result is shown as follows. The of the month and well correlates with the mean OAT. The amplitude of IGT rise and drop is both smaller than that of OAT. The OAT is higher than the IGT in spring and summer but otherwise is true in autumn and winter. The diurnal range of IGT is usually very small, normally less than 1 ℃ ; when it is between 1 to 2 ℃, it is mostly accompanied with a state of persis- tent temperature rise or drop, and when it is larger than 2℃, it is usually caused by cold air activity. With cold （warm） air, the IGT falls （rises） later than the OAT by some degree. The IGT falls （rises） by smaller extent but tends to fall （rise） consistently, showing consistent trends of change in daily averages.