Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Evaluating the Performance of Cumulus Convection Parameterization Schemes in Regional Climate Modeling System

Version 1 : Received: 25 May 2021 / Approved: 26 May 2021 / Online: 26 May 2021 (15:04:46 CEST)

How to cite: Nayak, S.; Maity, S. Evaluating the Performance of Cumulus Convection Parameterization Schemes in Regional Climate Modeling System. Preprints 2021, 2021050647 (doi: 10.20944/preprints202105.0647.v1). Nayak, S.; Maity, S. Evaluating the Performance of Cumulus Convection Parameterization Schemes in Regional Climate Modeling System. Preprints 2021, 2021050647 (doi: 10.20944/preprints202105.0647.v1).

Abstract

In this study, we explored the performance of the cumulus convection parameterization schemes of Regional Climate Modeling System (RegCM) towards the Indian summer monsoon (ISM) of a catastrophic year through various numerical experiments conducted with different convection schemes (Kuo, Grell amd MIT) in RegCM. The model is integrated at 60KM horizontal resolution over Indian region and forced with NCEP/NCAR reanalysis. The simulated temperature at 2m and the wind at 10m are validated against the forced data and the total precipitation is compared with the Global Precipitation Climatology Centre (GPCC) observations. We find that the simulation with MIT convection scheme is close to the GPCC data and NCEP/NCAR reanalysis. Our results with three convection schemes suggest that the RegCM with MIT convection scheme successfully simulated some characteristics of ISM of a catastrophic year and may be further examined with more number of convection schemes to customize which convection scheme is much better.

Subject Areas

RegCM, Indian Summer Monsoon, Cumulus Convection Schemes

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