Supplementary data for "More frequent warm and dry spells along persistent cold and wet spells in the Baltics"

Data accompanying publication “Climate warming brings rise of warm and dry spells while cold and wet spells persist in the Baltics” (DOI: 10.1007/s00704-026-06099-w): 1. [1_cell_id.csv] Cell identification and respective coordinates WGS84 reference system: 2. [2_daily.csv] Mean daily temperature, precipitation, reference evapotranspiration and water balance calculated from original hourly ERA5-land reanalysis (data in Fig. 2): 3. [3_DoY_stat.csv] Long term (1961-2020) 31-day moving window day-of-the-year (DoY) average and Q10 and Q90 temperature, precipitation, reference evapotranspiration and water balance: 4. [4_all_spells.csv] Warm/cold and dry/wet spells stratified by grid cell 5. [5_spell_stat.csv] Summary statistics for warm/cold and dry/wet spells stratified by grid cell and climate normal period: 6. [6_spell_trend.csv] Linear trend for warm/cold and dry/wet spells during 1961 to 2020. Explanation of abbreviations and variable names: 1. Cell_ID – cell identifier 2. X, Y – X and T coordinates in WGS 4 reference system 4. Par – meteorological parameters T – mean daily 2m air temperature P – daily precipitation ET0 – reference evapotranspiration CWB – daily climatological water balance 4. Stat – statistical parameter Q10 – 10th quantile Q90 – 90th quantile Mean – average <1 mm – precipitation less than 1 mm 5. Season – season of the year DJF – December, January, February MAM – March, April, May JJA – June, July, August SON – September, October, November 6. Npar – minim spell duration criteria N – at least 1 day N2 – at least 2 days Nmax – longest spell in a season 7. Period – climate normal period Reference – 1961-1990 Normal-3 – 1991-2020 8. MeanDays – mean duration of episode of unusual weather (spell) 9. MeanNumber – mean number of episodes of unusual weather (spell) in a season 10. MeanLength – mean length of episode of unusual weather (spell) 11. MaxDays – duration of longest episode of unusual weather (spell) Data derived from ERA5-Land data set provided by the Copernicus Climate Change Service (C3S) Climate Data Store (https://cds.climate.copernicus.eu) accessed on 2024-04-26. ERA5-land data are described in Muñoz-Sabater et al. (2021).