Perfomance evaluation of Global Climate Models (CCSM 3.0 and HadCM3) for Indian Monsoon Rainfall
Student name: Ms Charchika Sharma
Guide: Dr Devesh Sharma
Year of completion: 2010
Host Organisation: The Energy and Resources Institute (TERI)
Supervisor (Host Organisation): Dr Pradhan Parth Sarthi
Abstract: Indian summer Monsoon Rainfall (ISMR) is important for variety of purposes especially in agriculture and economic planning. Any fluctuation in their monthly and seasonal variation plays important role as an impact on different sectors like water and agriculture. To understand the IPCC model simulated rainfall performance over Indian region and their future projections, the climate models namely HadCM3 and CCSM3 of their comparatively high resolution are compared with observed IMD rainfall data over homogenous monsoon regions over India. The 20c3m simulation is treated as control run in all IPCC models. The all India gridded rainfall data has been used for the thirty years (1961-1990) in this study. The entire research study has finally shown different results both seasonally and regionally, for example, In Central Northeast region, for June and August month only CCSM3 model show more convincing results when compared to HadCM3 model. In West Central region, for July and August month HadCM3 model show more convincing results when compared to CCSM3 model and in Peninsular region, for August month both the models show 29.9% as total percentage of positive and negative departure years.
Key Words: Climate Model, summer monsoon, IMD, HadCM3, CCSM3.0
