Inclusion of the ECMWF ecRad radiation scheme (v1.5.0) in the MAR (v3.14), regional evaluation for Belgium, and assessment of surface shortwave spectral fluxes at Uccle

Jean-François Grailet, Robin J. Hogan, Nicolas Ghilain, David Bolsée, Xavier Fettweis, and Marilaure Grégoire

Model code and software

MAR (Modèle Atmosphérique Régional) version 3.14 Xavier Fettweis and Jean-François Grailet https://doi.org/10.5281/zenodo.13151275

ECRAD - ECMWF atmospheric radiation scheme R. J. Hogan https://doi.org/10.5281/zenodo.15075773

MARv3 - Modèle Atmosphérique Régional X. Fettweis https://gitlab.com/Mar-Group/MARv3

Short summary

The MAR (Modèle Régional Atmosphérique) is a regional climate model used for weather forecasting and studying the climate over various regions. This paper presents an update of MAR thanks to which it can precisely decompose solar radiation, in particular in the UV (ultraviolet) and photosynthesis ranges, both being critical to human health and ecosystems. As a first application of this new capability, this paper presents a method for predicting UV indices with MAR.