A physically-based model with remote sensing inputs for improved soil temperature retrievals

摘要

A physically-based soil temperature model using remote sensing inputs is being developed. The model uses the standard soil heat transfer equation together with remote sensing-based estimates of the surface temperature and incoming radiation to calculate soil temperature at various depths in the profile. Vertical polarization microwave brightness temperatures at a frequency of 37 GHz are used to estimate the near-surface soil temperature. Incoming radiation is derived from surface solar irradiance values acquired from the International Satellite Cloud Climatology Project (ISCCP) data archives. Experimental field observations were used first to develop the temperature model.