Advanced radiative transfer models for the simulation of in situ and satellite ocean color data (ARTEMIS-OC) : the novel adjacency perturbation simulator for coastal areas (NAUSICAA) code

This report, the second in a series, leverages JRC extensive experience in developing and applying highly accurate radiative transfer models to simulate in situ and satellite aquatic data, which are integrated into the JRC's Advanced Radiative Transfer Models for In situ and Satellite Ocean Color data (ARTEMIS-OC) software suite. ARTEMIS-OC includes i) the FEM code for simulating unpolarised solar radiation in open-ocean environments, ii) the PERSEA code to ensure a flexible and comprehensive modelling of the optical properties of realistic atmosphere and water environments, iii) the SkyFEM, FEMrad-OC, and AquaFEM codes, which are tailored FEM-PERSEA configurations to reproduce the sky-radiance distribution and the radiance detected by satellite and in-water sensors, respectively; and iv) the NAUSICAA code to simulate unpolarised solar radiation in coastal and inland water regions, i.e., in the presence of nearby land perturbations. All algorithms account for multiple scattering and allow varying illumination and observation geometries. The present report focuses on the NAUSICAA code and its applications in investigating and reducing uncertainties in OC data products. The ultimate goal of this report series is to provide a comprehensive description of the ARTEMIS-OC simulation tools in support of the Copernicus Programme launched in 2014 to establish a European capacity for Earth Observation.