An MPI-accelerated Monte Carlo algorithm for estimating the reflectance and transmittance properties of a wind-driven sea surface.

The Preisendorfer and Mobley Monte Carlo model is a classical photon-rough sea surface interaction model that is used to study the reflectance and transmittance properties of the wind-driven sea surface. In this paper, we develop a computational framework and the implementation for parallel processing of this model by using Message Passing Interface. We then analyze the correspondence between serial and parallel results and the speedup of the proposed algorithm on a single personal computer and computers cluster. The results indicate that achieved speedup is slightly lower than the linear speedup, and the parallel efficiency is slowly decreased by increasing the number of processes. Compared to a serial code, the relative differences of irradiance are all lower than 2.5%, and the relative differences of radiance are below 2.5% for air-incident source and below 10% for underwater source. [ABSTRACT FROM AUTHOR]