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"description": "This dataset contains the national and gridded historical population data for ISIMIP3b Group III (Frieler et al. 2026, in prep.). Gridded estimates are available for total as well as urban and rural population counts.
Annual country-level population data for 249 countries are based on the historic population estimates provided by the UN World Population Prospects (United Nations, 2019) until the year 2021. They are complemented by five yearly country-level future projections for SSP 1-5 (K.C. & Lutz, 2020, European Commission and Joint Research Centre, 2018, based on K.C. & Lutz, 2017). From 2021-2030 there is a transition period where the difference between the observed data in 2021 and the SSP projections in 2030 is gradually reduced to zero. From 2021-2100, the original projections in five-year steps are linearly interpolated to generate annual data.
In addition, we also provide gridded population data. For the past we used HYDE v3.3 (Klein Goldewijk et al. 2017, 2023, resolution 5arcmin) as the basis, while the projection data is based on Jones et al. (2020, resolution 30arcsec). Both data sets provide total, urban and rural populations. These maps were scaled such that the country-level population numbers are matched. In order to avoid grid cell shared by countries the scaling was performed on a 30 arcsec grid. To be able to do this the HYDE data were transferred to the high resolution grid by evenly spreading the population in a 5 arcmin grid cell on the underlying 30 arcsec land grid cells.",
"descriptionType": "Abstract"
}
],
"geoLocations": [
{
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"eastBoundLongitude": 179.5,
"northBoundLatitude": 89.5,
"southBoundLatitude": -89.5,
"westBoundLongitude": -179.5
},
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{
"citation": "ISIMIP3 simulation protocol (2020) https://www.isimip.org/protocol/3/",
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},
{
"citation": "Detailed description on isimip.org: National, gridded historical population (ISIMIP3b) \u2192 https://www.isimip.org/gettingstarted/input-data-bias-adjustment/details/124/",
"relationType": "IsDocumentedBy",
"relatedIdentifier": "https://www.isimip.org/gettingstarted/input-data-bias-adjustment/details/124/",
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{
"citation": "KC S., Lutz W. (2017) The human core of the shared socioeconomic pathways: Population scenarios by age, sex and level of education for all countries to 2100, Global Environmental Change,\r\nVolume 42, Pages 181-192, ISSN 0959-3780, https://doi.org/10.1016/j.gloenvcha.2014.06.004",
"relationType": "Cites",
"relatedIdentifier": "https://doi.org/10.1016/j.gloenvcha.2014.06.004",
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},
{
"citation": "Klein Goldewijk, K., Beusen, A., Doelman, J. and Stehfest, E.: Anthropogenic land use estimates for the Holocene \u2013 HYDE 3.2, Earth System Science Data, 9(2), 927\u2013953, 2017. https://doi.org/10.5194/essd-9-927-2017",
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"relatedIdentifier": "https://doi.org/10.5194/essd-9-927-2017",
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},
{
"citation": "European Commission, Joint Research Centre, Demographic and Human Capital Scenarios for the 21st Century: 2018 assessment for 201 countries, Wolfgang Lutz, Anne Goujon, Samir KC, Marcin Stonawski, Nikolaos Stilianakis (Eds.), Publications Office of the European Union, Luxembourg, 2018, ISBN 978-92-79-78024-0, EUR 29113, https://doi.org/10.2760/41776",
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{
"citation": "Jones, B., O'Neill, B. C., & Gao, J. (2020). Global 1-km Downscaled Population Base Year and Projection Grids for the Shared Socioeconomic Pathways (SSPs), Revision 01 (Version 1.01) [Data set]. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/Q7Z9-9R69",
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"citation": "K.C., S. (2020). Updated demographic SSP4 and SSP5 scenarios complementing the SSP1-3 scenarios published in 2018. IIASA Working Paper. Laxenburg, Austria: WP-20-016 https://pure.iiasa.ac.at/16710",
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"citation": "Klein Goldewijk, C.G.M., Beusen, A., Doelman, J., Stehfest, E., 2017, Anthropogenic land use estimates for the Holocene \u2013 HYDE 3.2, Earth Syst. Sci. Data, 9, 927\u2013953, https://doi.org/10.24416/UU01-67UHB4",
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"citation": "United Nations, Department of Economic and Social Affairs: Population Division (2019), World Population Prospects 2019, archive [data set], (last access: 22 December 2023), 2019. https://population.un.org/wpp/Download/Archive/Standard/",
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