Hourly estimation of soil heat flux density at the soil surface with three models and two field methods

作者：Venegas P^*; Grandon A; Jara J; Paredes J

来源：Theoretical and Applied Climatology, 2013, 112(1-2): 45-59.

DOI：10.1007/s00704-012-0705-z

Heat flux density at the soil surface (G (0)) was evaluated hourly on a vegetal cover 0.08 m high, with a leaf area index of 1.07 m(2) m(-2), during daylight hours, using Choudhury et al. (Agric For Meteorol 39:283-297, 1987) (), Santanello and Friedl (J Appl Meteorol 42:851-862, 2003) (), and force-restore () models and the plate calorimetry methodology (), where the gradient calorimetry methodology (G (0R) ) served as a reference for determining G (0). It was found that the peak of G (0R) was at 1 p.m., with values that ranged between 60 and 100 W m(-2) and that the G (0)/Rn relation varied during the day with values close to zero in the early hours of the morning and close to 0.25 in the last hours of daylight. The model presented the best performance, followed by the and models. The plate calorimetry methodology showed a similar behavior to that of the gradient calorimetry referential methodology.

• 出版日期2013-4