[AAS01-P02] Spatial-scale Characteristics of Three-dimensional Cloud-resolving Radiation Budget by Monte Carlo Radiative Transfer Simulations
In this study, three-dimensional atmospheric radiative transfer model has been developed for the purpose of evaluating the cloud-resolving radiation budget. Monte Carlo method has been employed as a basic scheme because the method is easily applicable to complex three-dimensional system rather than explicit analytical radiative transfer scheme. Multiple-scattering, absorption, and emission effects are taken into account to the radiative transfer process. The gas absorption data optimized with correlated-k distribution method are implemented in order for efficient broadband calculation. In addition, the dependent sampling method enables simultaneous calculations at multi-wavelength, which is suitable to sub-band integrations of the correlated-k distribution data.
The Monte Carlo radiative transfer model was applied to cloud scenes calculated by large eddy simulation model, and cloud-resolving radiative energy budgets were estimated for several different spatial-scales. Performance of the Monte Carlo radiative transfer model and the spatial-scale characteristics of three dimensional radiation effects will be discussed from the point of view of cloud-resolving radiation budget.