alexa Temperature and Precipitation Climatology Assessment ov
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
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Research Article

Temperature and Precipitation Climatology Assessment over South Asia using the Regional Climate Model (RegCM4.3): An Evaluation of the Model Performance

Mujtaba Hassan1,2*, Du Penfei1, Waheed Iqbal3, Wang Can1, Fang Wei1 and Wulong Ba1
1State Key Laboratory of Environmental Simulation and Pollution Control (SKLESPC), School of Environment, Tsinghua University Beijing, China
2Department of Space Science, Institute of Space Technology, Islamabad 44000, Pakistan
3Research and Development Division, Pakistan Meteorological Department, Islamabad 44000, Pakistan
Corresponding Author : Mujtaba Hassan
State Key Laboratory of Environmental Simulation and Pollution Control (SKLESPC)
School of Environment, Tsinghua University Beijing, China
Tel: +86-131200765
E-mail: [email protected]
Received June 20, 2014; Accepted August 20, 2014; Published August 30, 2014
Citation: Hassan M, Penfei D, Iqbal W, Can W, Wei F, et al. (2014) Temperature and Precipitation Climatology Assessment over South Asia using the Regional Climate Model (RegCM4.3): An Evaluation of the Model Performance. J Earth Sci Clim Change 5:214. doi: 10.4172/2157-7617.1000214
Copyright: © 2014 Hassan M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

Climate modeling is a significant tool to reproduce the observed features of present climate changes and can provide reliable estimations for future climate changes at global and regional levels. In the present study we use latest version of International Center for Theoretical Physics (ICTP) regional climate model (RegCM4.3) to examine its ability by analyzing the European Community-Hamburg atmospheric model (ECHAM5) and the European Centre for Medium-Range Weather Forecast (ECMWF) 40 years reanalysis data (ERA-40) over South Asia. Seasonal mean climatology and annual cycle are compared with different observation based data sets and also with the reanalysis and driving GCM. Two experiments are conducted for present day simulation (1971-2000) by using ERA-40 reanalysis and ECHAM5 GCM to provide the initial and lateral boundary conditions. In spite of complex topography of the domain RegCM4.3 shows an improved performance in various aspects as compared to the earlier applications of this model over South Asia. Near surface air temperature are reproduced well over the most part of the domain. Indian monsoon precipitation patterns are better captured by RegCM4.3 as compared to the driving data set of ECHAM5 and ERA40. Simulation results show that RegCM4.3 has cold bias in winter and summer over the foothills of the Hindu-Kush-Himalaya (HKH) region. Simulation with ERA40 and ECHAM5 overestimated the seasonal mean precipitation over some part of the domain which requires further improvement in the physical parameterization scheme of RegCM4.3.

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