HYDE data for the Global Carbon Budget (2024)
This HYDE version 3.4 replaces former HYDE 3.3 version. This database presents an update and expansion of the History Database of the Global Environment (HYDE, v 3.4). HYDE is and internally consistent combination of updated historical population estimates and land use. Categories include cropland, with a new distinction into irrigated and rain fed crops (other than rice) and irrigated and rain fed rice. Also grazing lands are provided, divided into more intensively used pasture, converted rangeland and non-converted natural (less intensively used) rangeland. Population is represented by maps of total, urban, rural population and population density as well as built-up area. The period covered is 10,000 BCE to 2024 CE. Spatial resolution is 5 arc minutes (approx. 85 km2 at the equator), the files are in Arcmap asciigrid format. Major updates include: • Radiocarbon data from the IMSET project (Marc Vander Linden, pers.comm.), new estimates for EurAsia of the onset of agriculture (timing and location, gridded maps) • Implementation of new archaeological expertise from the ArchaeoGlobe Project (Stephens et al, 2019), onset of agriculture (timing and location per region, outside EurAsia) • Use of most recent and higher resolution satellite information on land cover from the European Space Agency (ESA) consortium for the spatial land use allocation on a yearly basis from 1992 – 2018. • Use of different remote sensing imagery (MODIS) and statistics (MapBiomas version C8) for Brazil for the 1985-2022 period, and for Indonesia (MB 2.0) for the 2000-2022 period, China for the 1990-2019 period. • Extension of the database to year 2023 • More input on sub-national level for cropland and grazing land • netCDF added as output format
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