The Regional Coupled Suite (RCS-IND1): application of a flexible regional coupled modelling framework to the Indian region at kilometre scale
نویسندگان
چکیده
Abstract. A new regional coupled modelling framework is introduced – the Regional Coupled Suite (RCS). This provides a flexible research capability with which to study interactions between atmosphere, land, ocean, and wave processes resolved at kilometre scale, effect of environmental feedbacks on evolution impacts multi-hazard weather events. configuration RCS focussed Indian region, termed RCS-IND1, introduced. RCS-IND1 includes Unified Model (UM) directly JULES land surface model, grid horizontal spacing 4.4 km, enabling convection be explicitly simulated. These are through OASIS3-MCT libraries 2.2 km NEMO ocean WAVEWATCH III model configurations. To examine potential approach reduce computation cost simplify initialization, an alternative couple atmosphere lower resolution Multi-Column K-Profile Parameterization (KPP) for ocean. Through development framework, variety fully partially experiments can defined, along traceable uncoupled simulations options use external input forcing in place missing components. offers wide scope researchers designing sensitivity case assessments. Case results presented assessed demonstrate application simulate two tropical cyclone cases developed Bay Bengal, namely Titli October 2018 Fani April 2019. Results show realistic simulations, that coupling improve track produces more intensification than but prevents sufficient Fani. Atmosphere-only UM omit influence frictional heating boundary layer prevent over-intensification. However, it shown this term rigorous treatment near-surface energy budget represented. For these cases, 1D mixed scheme shows similar first-order SST cooling feedback cyclones 3D Nevertheless, generally stronger localized Coupling waves has limited cases. Priorities future discussed.
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ژورنال
عنوان ژورنال: Geoscientific Model Development
سال: 2022
ISSN: ['1991-9603', '1991-959X']
DOI: https://doi.org/10.5194/gmd-15-4193-2022