收稿日期: 2008-08-15
修回日期: 2008-11-18
网络出版日期: 2009-05-15
Diurnal variation of the multi-layer soil temperature in winter in Shenzhen
Received date: 2008-08-15
Revised date: 2008-11-18
Online published: 2009-05-15
分析深圳冬季不同天气影响下地温日变化,结果表明,没有冷空气影响的晴天,地面温度和浅层地温呈现正弦曲线日变化,白天高,夜间低. 各层地温振幅、位相不同,地面温度振幅最大,越往深层,振幅越小,位相越后,周期越长. 地温垂直结构也有日变化,正午时段从地面到40cm 土壤,温度随深度降低,40cm 以下地温随深度升高. 凌晨从地面至320cm 土壤,地温依次升高. 冷空气影响下的阴天,地面温度和浅层地温也呈现正弦曲线日变化,但日变化幅度远小于晴天;地温垂直结构,除了正午前后几个小时地面温度要高于5cm 地温外,其他时间从地面到320cm 土壤,温度依次升高. 冷空气影响下的阴雨天,地面温度和浅层地温随时间逐步降低,地温从地面到320cm 土壤依次升高. 无论是晴天、阴天,还是阴雨天,160cm 以下深层地温,其日变化幅度均小于0.2℃.
李兴荣 , 胡非 , 孙向明 , 刘锦泉 . 深圳冬季多层地温日变化特征[J]. 中国科学院大学学报, 2009 , 26(3) : 323 -329 . DOI: 10.7523/j.issn.2095-6134.2009.3.006
Based on the soil temperature data from Shenzhen climatic observatory, the diurnal variation of the soil temperature and its profiles in winter in Shenzhen city were analyzed under different types of weather condition. The soil temperature above 160cm has different diurnal variations under different weather conditions and the cold air has greatest effects. The soil temperature below 160cm deep has very small diurnal variation whether it is a sunny, overcast or rainy day with or without cold air effects.
Key words： soil temperature; profile; diurnal variation; winter
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