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Era-interim Forced Simulation of the Indian Summer Monsoon |
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| Authors: | Lav Kumar Nishtha Agrawal Abhishek K Rai Shailendra K Mishra Vinay S Pandey |
| Institution: | 1. K. Banerjee Centre of Atmospheric and Ocean Studies (KBCAOS), Institute of Inter Disciplinary Studies, Nehru Science Centre, University of Allahabad, Prayagraj, Uttar Pradesh, India;2. Centre for Oceans, Rivers, Atmosphere and Land Science, IIT Kharagpur, Kharagpur, West Bengal, India;3. Department of Anthropology, University of Allahabad, Prayagraj, Uttar Pradesh, India;4. Department of Physics, National Institute of Technology, New Delhi, Delhi, India |
| Abstract: | AbstractIn the present study, mean rainfall for the months of June-July-August-September (JJAS) during summer monsoon is simulated over India and its adjoining regions for a period between 1982 and 2006. The study was carried out using Regional Climate Model (RegCM) version 4.6 at a resolution of 25?km. The simulated mean JJAS monsoon rainfall was validated against the observational IMD data. Comparison of JJAS seasonal mean summer rainfall for the first decade 1982–1991, with the later decade 1997–2006 indicate that the intensity of rainfall increases over Indian land-mass during the later decade under the forced conditions of Era-Interim. The observed JJAS mean rainfall indicates two maximum rainfall areas i.e. the Western Ghats and the Himalayan region. A significant bias is observed in the central and Jammu and Kashmir (J&K) region. The JJAS mean seasonal surface air temperature distribution at 0.25?×?0.25-degree grids resolution shows a decreasing trend of temperature over the Indian landmass. |
| Keywords: | Indian Monsoon Regional Climate Model CORDEX Evapotranspiration |