Development of Microwave Emission Model for Frozen Soil with Considering the Volume Scattering Effect

摘要

Land surface freeze/thaw (F/T) has an important influence on the carbon cycle of the ecosystem, hydrological and meteorological. Affected by the frozen of water in soil, the frozen soil would become larger soil particles due to condensation, resulting in its soil particles being larger than those of the melting soil. The microwave radiation of frozen soil has a significant volume scattering effect in the high frequency band due to large particles of frozen soil. This paper developed a frozen soil microwave emission model considering the volume scattering effect of frozen soil particles based on dense media radiative transfer (DMRT) model [1] by combining experimental data and numerical simulation. The simulation results of the frozen soil microwave emission model, combined model for cold land [2] and the three-layer incoherent media model [3] were validated and compared with the experimental data. Results show that frozen soil microwave emission model which considering the volume scattering effect of frozen soil is better than the other two models. It is necessary to consider the volume scattering effect of frozen soil.