Climate Extremes Indicators

All indicators are derived from the daily bias-corrected climate data of the ISIMIP3b input datasets and are organized into two groups. The first five are directly calculated from daily mean and maximum 2 m air temperature and daily precipitation, respectively. The remaining four indicators are derived from the Canadian Forest Fire Weather Index (FWI), produced by Yi-Ling Hwong (IIASA) and kindly provided to PIK. Currently, the FWI-based indicators cover only the historical period from 1974 onwards and the baseline period for two of these FWI-based indicators is set to 1974–2004. In a future update, we plan to extend the historical time series back to 1851 and apply 1851–1900 as the baseline consistently for all indicators. All data is reduced by masking the marine areas. Detailed descriptions of all indicators are provided below, where each list item corresponds to the variable name used in the dataset.<br>⚫︎ temp-annual-max (TXx): Annual maximum temperature<br>⚫︎ temp-variability (TV): Temperature Variability<br>⚫︎ pr-annual-max (Rx1day): Maximum over the year of the 1-day precipitations<br>⚫︎ pr-extreme-99-9: Extreme Daily Precipitation Annual Sum (above 99.9th percentile of baseline period daily data)<br>⚫︎ pr-wetdays-gt1mm (W): Number of wet days &gt; 1mm precipitation<br>⚫︎ fwi-annual-max (FWIXx): Maximum of the daily FWI over the year<br>⚫︎ fwi-ndays-extreme (FWIxd): Number of days with extreme fire weather above 95th percentile of 1974-2004 baseline<br>⚫︎ fwi-avg-seasonal (FWISA): Annual Maximum of Seasonal Average of Fire Weather Index (90 days running mean)<br>⚫︎ fwi-season-length (FWILS): Number of days for which the FWI is above the mean of minimum and maximum of the FWI over the reference period 1974-2004 for this single ensemble member<br>These datasets have been created within the SPARCCLE project framwork as Deliverable D2.1 (https://sparccle.eu/).