G2DC-PL+: a gridded 2 km daily climate dataset for the union of the Polish territory and the Vistula and Odra basins

摘要: Abstract. G2DC-PL + , a gridded 2  km daily climate dataset for the union of the Polish territory and Vistula Odra basins, is an update and extension of CHASE-PL Forcing Data – Gridded Daily Precipitation and Temperature Dataset 5  (CPLFD-GDPT5). The latter was first publicly available, high-resolution forcing in Poland, used for range purposes including hydrological modelling bias correction of projections. While spatial coverage new remained the same, it has undergone several major changes: (1) time was increased from 1951–2013 to 1951–2019; (2) its resolution increased from 5 ; (3) number stations used interpolation of temperature precipitation approximately doubled; (4) addition to precipitation temperature, consists relative humidity and wind speed data. main purpose developing this product need long-term areal data earth-system modelling, particularly hydrological modelling. Geostatistical methods (kriging) were for interpolation studied variables. kriging cross-validation revealed improved performance compared original dataset expressed by median root mean squared errors standardized by standard deviation observations (0.59 vs. 0.79). Kriging were negatively correlated with station density only period 1951–1970. Values error normalized (RMSEsd) equal 0.52 0.4 minimum maximum temperature, respectively, suggesting small moderate improvement over the original dataset. Relative wind exhibited lower performance, RMSEsd 0.82 0.87, respectively. The dataset openly available 4TU Centre Research at https://doi.org/10.4121/uuid:a3bed3b8-e22a-4b68-8d75-7b87109c9feb ( Piniewski et al. ,  2020 ) .