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). Three General Circulation Models i.e. EC-Earth3, CESM2-WACCM, MPI-ESM1-2-HR 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 three separate time periods i.e immediate-future(2015-2039), near future (2040-2059) and far future (2060-2100) and the future data from three GCMs are averaged using Reliability Ensemble Averaging method (Chandra et al., 2015) to obtain a weighted future data. Scale-invariance method (Yeo et al., 2021) 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.