CERFACS, Sciences de l'Univers au CERFACS, URA1875, 42 Av. G. Coriolis, 31057 Toulouse Cedex 01, France
Received: 13 Jul 2012 – Published in Geosci. Model Dev. Discuss.: 31 Jul 2012
Abstract. This paper presents the OASIS3 coupling software used in five of the seven European Earth System Models (ESMs) participating to the Fifth Coupled Model Intercomparison Project (CMIP5). A short history of the coupler development is followed by a technical description of OASIS3. The performances of a few relatively high resolution models coupled with OASIS3 are then described. It is shown that, although its limited field-per-field parallelism will eventually become a bottleneck in the simulation, OASIS3 can still be considered an appropriate tool for most of these relatively demanding coupled configurations. Its successful use in different CMIP5 ESMs is then detailed. A discussion of the benefits and drawbacks of the OASIS3's approach and a presentation of planned developments conclude the paper.
Revised: 11 Jan 2013 – Accepted: 11 Feb 2013 – Published: 14 Mar 2013
Valcke, S.: The OASIS3 coupler: a European climate modelling community software, Geosci. Model Dev., 6, 373-388, doi:10.5194/gmd-6-373-2013, 2013.