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Jagannathan, R.
- Comparative Performance of RegCM Model Versions in Simulating Climate Change Projection over Cauvery Delta Zone
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Authors
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1 Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore-641003, Tamilnadu, IN
1 Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore-641003, Tamilnadu, IN
Source
Indian Journal of Science and Technology, Vol 6, No 8 (2013), Pagination: 5115-5119Abstract
RegCM is a Regional Climate Model (RCM), mostly applied in regional climate change and seasonal prediction around the world. The International Centre for Theoretical Physics improves this model and releases updated version over years. In the present study a comparison was made between RegCM3 and RegCM4 versions of this model in simulating climate change over Cauvery Delta Zone of Tamilnadu. The simulations were made using ECHAM5 global climate model outputs of A1B scenario with a resolution of 25 km from 1971 to 2100. The comparison of yearly and decadal means indicated that there exists a significant and positive difference in simulation of rainfall and relative humidity by RegCM4 while solar radiation, maximum temperature, minimum temperature and wind speed showed significant negative difference. The Seasonal and monthly comparisons revealed that difference across weather variables is not consistent as that of yearly and decadal. The decadal projections showed a marked increase in maximum temperature, minimum temperature and rainfall. A slight increase in relative humidity and a slight decline in solar radiation and wind speed were noticed under RegCM4 simulations.Keywords
RegCM3, RegCM4, Cauvery Delta Zone, A1B ScenarioFull Text
References
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- Influence of Projected Climate on Rice Yield Over Tamilnadu
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Authors
Affiliations
1 Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore-641003, Tamilnadu, IN
1 Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore-641003, Tamilnadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 11 (2015), Pagination:Abstract
A study was carried out at Agro Climate Research Centre, Tamil Nadu Agricultural University using PRECIS and RegCM4 Regional Climate Models (RCMs) by downscaling HadCM3 (Q0) and ECHAM5 global climate model outputs at 25 km resolution. The downscaled data obtained from the RCMs were verified with CRU observed climatology and found to have good agreement. Four weather variables viz., maximum temperature, minimum temperature, solar radiation and rainfall were extracted and employed in DSSAT crop simulation model for rice yield simulation for agricultural grids of Tamilnadu State India from 1971-2100. Two treatments were fixed as control and CO2 enriched conditions. The maximum temperature and minimum temperature showed increase in temperature at the end of the century with high rate of increase for minimum temperature. Rainfall exhibited high variability. The rice yield simulations showed decline in yield in the study period for both control and CO2 enriched conditions, with later consistently showing higher yields than the former till the end of 21st century.Keywords
21st Century, Climate Projection, Rice Yield, TamilnaduFull Text