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Comparison of RegCM3 simulated meteorological parameters in Bangladesh: Part I-preliminary result for rainfall

Authors:

Md Misanur Rahman,

SAARC Meteorological Research Centre, Dhaka, Bangladesh, BD
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Md Nazrul Islam ,

Department of Physics, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh, BD
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Ahsan Uddin Ahmed,

Bangladesh Unnayan Parishad, Niketan, Gulsan 1, Dhaka, Bangladesh, BD
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Romee Afroz

SAARC Meteorological Research Centre, Dhaka, Bangladesh, BD
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Abstract

A Regional Climate Model of version 3 (RegCM3) is employed for the study of meteorological parameters in Bangladesh. To adopt the RegCM3 for this region comparison of model outputs with surface observational data is essential. In this connection, this paper represents the comparison of model rainfall with surface observational data of 29 stations throughout the country collected by the Bangladesh Meteorological Department (BMD). RegCM3 is run at 0.54° × 0.54° horizontal grid resolution in two parameterizations: Grell scheme with Arakawa- Schubert (GAS) and Fritch-Chappell (GFC) assumptions. GAS run used Lateral Boundary Conditions (LBCs) data for 1995-2000 whereas GFC run used LBC data for 1991, 1994, 1996 and 1999. For the entire rainy season (March-November), model estimates about 101% of the surface rain for GFC option whereas model overestimates in pre-monsoon and underestimates in monsoon periods. The GFC option is found better than the GAS option in estimating rainfall by the model.

doi:10.4038/sljp.v8i0.208  

Sri Lankan Journal of Physics, Vol. 8 (2007) 1-9

How to Cite: Rahman, M.M. et al., (2007). Comparison of RegCM3 simulated meteorological parameters in Bangladesh: Part I-preliminary result for rainfall. Sri Lankan Journal of Physics. 8, pp.1–9. DOI: http://doi.org/10.4038/sljp.v8i0.208
Published on 11 Nov 2007.
Peer Reviewed

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