30-Year Canadian Fire Weather Index Simulations over Europe: CMIP6-Informed Temperature and Precipitation Perturbations

The dataset integrates a 30-year Canadian Fire Weather Index (FWI), generated using the Global ECMWF Fire Forecast model, forced by ERA5 reanalysis data (1981-2010). These simulations incorporate perturbations in temperature and precipitation forcings based on CMIP6 climate projections under the SSP2-4.5 medium mitigation scenario. The perturbed forcings were produced by modifying the daily temperature and precipitation data from ERA5 for the period of control from 1980 to 2010, using monthly factors that were estimated from a combination of climate change signals obtained from CMIP6 multi-model simulations, along with mean annual perturbations. The perturbation for temperature was constructed as an additive factor, varying from 0°C to 5°C with an increment of 1°C, added to the projected temperature under the SSP2-4.5 climate scenario. The perturbation for precipitation was constructed as a multiplicative factor, ranging from 0.6 to 1.6 with an increment of 0.2. The dataset offers daily FWI values across Europe, with a 31 km resolution, for each perturbation scenario over three decades.