Improvement of the time calculation of cloud radiance of one atmosphere by the method TDMAP

Abstract

In this work we used the TDMAP model (Tree Driven Mass Accumulation Process) which is the generalization of a suitable wavelet decomposition of fractional Brownian motion (MBF), to improve CPU calculation time of the radiative transfer equation solutions. In the case of radiances, these wavelets are called luxlets. We calculated radiances for a cloudy atmosphere. The calculation is performed on altocumulus with 1.5 g per cubic centimeter of Liquid Water Content (LWC). The results were compared to the same atmosphere with the results of SHDOM (Spherical Harmonic Discrete Ordinate Method). After a statistical study we have good correlation of results from both models and have improved the CPU computation time by 9.3%.