Biases in Shortwave Three-Dimensional Radiative Transfer Calculations for High-Resolution Numerical Models

This study investigated biases of diffuse radiation in a look-up table approach, which pre-computed the sequential ray tracing to avoid heavy computation full three-dimensional radiative transfer calculation. We introduced corrections that enhanced directionality propagation solar angle and horizontal direction. By comparing irradiance calculations with without for cloudy field an idealized atmospheric simulation, it was found helped mitigate vertically localized false signals by irradiance. The results suggested two types directionalities are important accurately represent inhomogeneous atmosphere.