Canadian Forest Fire Danger Rating System (CFFDRS) Fire Weather Indices from ERA5 for Arctic / Boreal Zone (1959-2024)

Daily fire weather indices from the Canadian Forest Fire Danger Rating System (CFFDRS) Fire Weather Index (FWI) set were calculated for the Arctic-boreal circumpolar region from ERA5 [1]: Build-Up Index (BUI), Fine Fuel Moisture Code (FFMC), Initial Spread Index (ISI), Duff Moisture Code (DMC), Drought Code (DC), Fire Weather Index (FWI). The data are provided on the ERA5 grid (0.25° latitude (lat)/longitude (lon) spacing) together with the respective input data: 2 meter (m) air temperature, relative humidity, 10 m wind speed (all at solar noon) as well as 24 accumulated total precipitation. Solar noon was calculated as a function of longitude. [1] Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A., Muñoz-Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D., Simmons, A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P., Biavati, G., Bidlot, J., Bonavita, M., … Thépaut, J.-N. (2020). The ERA5 global reanalysis. Quarterly Journal of the Royal Meteorological Society, 146(730), 1999–2049. https://doi.org/10.1002/qj.3803