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

本数据集基于ERA5[1]，针对北极-环北极寒带针叶林区域，计算得到加拿大森林火灾危险评级系统（Canadian Forest Fire Danger Rating System, CFFDRS）火灾天气指数（Fire Weather Index, FWI）体系下的每日火灾天气指数，涵盖增强指数（Build-Up Index, BUI）、细燃料湿度码（Fine Fuel Moisture Code, FFMC）、初始蔓延指数（Initial Spread Index, ISI）、腐殖质湿度码（Duff Moisture Code, DMC）、干旱码（Drought Code, DC）及火灾天气指数（Fire Weather Index, FWI）。
数据采用0.25°经纬度间距的ERA5网格格式发布，同时配套提供对应的输入气象数据：2米高度气温、相对湿度、10米高度风速（所有要素均采集自太阳正午时刻），以及24小时累积总降水量。太阳正午时刻通过所在经度计算得到。
[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). 全球再分析数据集ERA5. 《英国皇家气象学会季刊》, 146(730), 1999–2049. https://doi.org/10.1002/qj.3803