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

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Month	HTML	PDF	XML	Total
Aug 2024	153	52	59	264
Sep 2024	62	14	6	82
Oct 2024	47	5	2	54
Nov 2024	39	7	87	133
Dec 2024	68	51	97	216
Jan 2025	21	17	81	119
Feb 2025	25	6	0	31
Mar 2025	73	23	5	101
Apr 2025	75	10	3	88
May 2025	24	7	0	31

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Latest update: 15 May 2025

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.