MOPREDAScentury: a long-term monthly precipitation grid for the Spanish mainland

[EN] A gridded data set on monthly precipitation over mainland Spain between December 1915 and December 2020. The dataset combines ground observations from the National Climate Data Bank (NCDB) of the Spanish national climate and weather service (AEMET) and new data rescued from meteorological yearbooks published prior to 1951 that was never incorporated into the NCDB. The yearbooks data represented a significant improvement of the dataset, as it almost doubled the number of weather stations available during the first decades of the 20th century, the period when the dataset was more scarce. The final dataset contains records from 11,312 stations. Spatial interpolation was performed using geostatistical techniques over a regular 10x10 km grid, using a two-stage process: estimation of the probability of zero-precipitation (dry month), and estimation of precipitation magnitude.