Referee comment: Coupling of the regional climate model COSMO-CLM using OASIS3-MCT with regional ocean, land surface or global atmosphere model: description and performance

This paper present a detailed analysis of the performance of coupling configurations involving the COSMO-CLM regional model.An extensive literature exists on the performance analysis of individual models or codes but there is much less published on the performance of the coupled system and on the coupling aspects per se.This paper addresses this gap and as the work onto which it is based is sound, it deserves publication.However, I consider it needs major revisions before being published.C1