Characteristics of Surface Heat Flux in Shanghai During Summer and Its Influencing Factors

被引：0
|
作者：
Lu Y. [1 ]
Li Y. [1 ]
Shigetoshi I. [2 ]
Yasumitsu N. [2 ]
Wang R. [1 ]
机构：
[1] Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai
[2] Advanced Technology R&D Center, Mitsubishi Electric Corporation, Hyogo
来源：
Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2019年 / 53卷 / 08期
关键词：
Soil moisture content; Solar radiation; Surface heat flux; Thermal diffusion equation-correction (TDEC) method; Typical days;
D O I：
10.16183/j.cnki.jsjtu.2019.08.001
中图分类号：
学科分类号：
摘要：
The test accuracy of soil heat flux at 5 mm is verified through thermal diffusion equation-correction (TDEC) method, which can represent the surface heat flux. Meanwhile, considering different factors (solar radiation, soil moisture content and cloud cover, etc. ), the diurnal variations of heat flux on three kinds of typical days (clear, cloudy and rainy days) are summarized in Shanghai. The influence of different factors on soil heat flux at 5 mm and the principles are comprehensively analyzed through variable control approaches. The results show that soil heat flux at 5 mm obviously fluctuates on clear days, from -23.62 W/m2 to 111.81 W/m2. The fluctuation range decreases with the decrease of soil depth on cloudy and rainy days. The correlation (R2>0.74) between solar radiation and soil heat flux is strong on days without rain. The fluctuation range of soil heat flux is reduced by the increase of soil moisture content. Soil heat flux of different typical days is mostly affected by different factors. © 2019, Shanghai Jiao Tong University Press. All right reserved.
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页码：891 / 897
页数：6
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