Long-term estimation of soil heat flux by single layer soil temperature |
| |
Authors: | Cheng-I Hsieh Cheng-Wei Huang Ger Kiely |
| |
Institution: | (1) Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, 10617, Taiwan;(2) Department of Civil and Environmental Engineering, University College Cork, Cork, Ireland |
| |
Abstract: | Soil heat flux is one of the important components of surface energy balance. In this study, long-term estimation of soil heat
flux from single layer soil temperature was carried out by the traditional sinusoidal analytical method and the half-order
time derivative method of Wang and Bras Wang and Bras (1999) J Hydrol 216:214–226]. In order to understand the characteristics of soil heat flux and to examine the performances of the
two methods, a field experiment was conducted at a temperate and humid grassland in Cork, Ireland. Our results show that the
soil heat flux had the same magnitude as the sensible heat flux at this grassland site. It was also demonstrated that the
analytical method did not predict the soil heat flux well because the sinusoidal assumption for the temporal variation in
soil heat flux was invalid. In contrast, good agreement was found between the soil heat flux measurements and predictions
made by the half-order time derivative method. This success suggests that this method could be used to estimate soil heat
flux from long-term remotely sensed surface temperature. |
| |
Keywords: | Half-order method Soil heat flux Soil temperature |
本文献已被 SpringerLink 等数据库收录! |
|