Estimation of surface shortwave radiation components under all sky conditions: Modeling and sensitivity analysis

► Proposed a modified atmospheric solar radiative transfer model named as MODTRAN-CF ► Involved two cloud fraction related factors and all solar-cloud-viewing geometries ► Simulation results can reflect the solar radiation enhancement by clouds. ► A global sensitivity analysis method has been implemented. ► The superiority of MODTRAN-CF has been validated by field measurements.