ISIMIP3a population input data

This dataset contains the national and gridded historical population data for ISIMIP3a (Frieler et al. 2023). Estimates are available for total as well as urban and rural population counts.
With version 1.1, we provide gridded population data, that is based on HYDE v3.3 (private communication with K. Klein Goldewijk, to be published). Just like the original dataset we provide total, rural and urban population per grid cell. Data for all grid cells of a country have been rescaled such that the country's total population matches the numbers provided by the 2019 revision of the UN World Population Prospects (WPP) database (United Nations, 2019).
Version 1.2 corrects a mistake in the coastal regions that led to a too high population in those grid cells.
Version 1.3 extends the national data to 1850. The additional years were derived from the gridded historic population map by means of the fractional ISIMIP country mask.