Future Intensity-Duration-Frequency relationship of Precipitation across India based on CMIP6 projections
Description
The Future precipitation Intensity-duration-frequency (IDF) relationships across India are prepared based simulated data from the 6th phase of Coupled Model Intercomparison Project (CMIP6). Twelve General Circulation Models i.e. ACCESS-CM2, ACCESS-ESM1-5, AWI-ESM-1-REcoM, CESM2-WACCM, CMCC-CM2-SR5, EC-Earth3, EC-Earth3-veg, INM-CM4-8, INM-CM4-8, IPSL-CM6A-LR, MPI-ESM1-2-HR, MPI-ESM1-2-LR considering three climate change scenarios (SSP126, SSP245, SSP585) from CMIP6 are considered. The future data is bias-corrected against two reanalysis data i.e. Indian Monsoon Data Assimilation and Analysis (IMDAA) and 5th generation European Centre for Medium-Range Weather Forecasts (ERA5) separately. The future projections are divided in two separate time periods i.e epoch-1 (2022-2060), and epoch-2 (2061-2100) and the future data from twelve GCMs are averaged using Reliability Ensemble Averaging method to obtain a weighted future data. Scale-invariance method is used to obtain sub-daily future data from daily data. The future IDF relationship is presented for 7 duration (1-, 2-, 3-, 6-, 9-, 12-, 24- hour) and 6 return periods (2-, 5-, 10, -25, 50, 100- year) considering two future periods and three climate change scenarios. The data is available at 0.25×0.25° spatial resolution across India.