Overview of the latest developments
Januari 2011. The land use part of HYDE is published now. Title: Klein Goldewijk, K. , A. Beusen, M. de Vos and G. van Drecht, 2011. The HYDE 3.1 spatially explicit database of human induced land use change over the past 12,000 years, Global Ecology and Biogeography 20(1): 73-86. DOI: 10.1111/j.1466-8238.2010.00587.x.
Also, a co-authored paper is published: Kaplan, J.O., K.M. Krumhardt, E.C. Ellis, W.F. Ruddiman, C. Lemmen and K. Klein Goldewijk, 2010. Holocene carbon emissions as a result of anthropogenic land cover change, The Holocene20(8), doi:10.1177/0959683610386983. See also here for more information on the EPFL website.
December 2010. The population part of HYDE is published. Title: Klein Goldewijk, K. , A. Beusen, and P. Janssen, 2010. Long term dynamic modeling of global population and built-up area in a spatially explicit way, HYDE 3 .1, The Holocene 20(4): 565-573. doi:10.1177/0959683609356587
Another co-authored paper is published, describing 300 years of anthropogenic transformation of terrestrial biomes. Title: Ellis, E.C., K. Klein Goldewijk, S. Siebert, D. Lightman and N. Ramankutty, 2010. Anthropogenic transformation of the biomes, 1700 to 2000, Global Ecology and Biogeography 19(5): 589–606, DOI: 10.1111/j.1466-8238.2010.00540.x. See also here for the Anthromes website.
January 2010. A paper describing the land use part of HYDE is accepted for publication. Title: Klein Goldewijk, K. , A. Beusen, M. de Vos and G. van Drecht. 2009. The HYDE 3.1 spatially explicit database of human induced land use change over the past 12,000 years, Global Ecology and Biogeography, accepted, in press.
November 2009. A paper describing the population part of HYDE is accepted for publication. Title: Klein Goldewijk, K. , A. Beusen, and P. Janssen, Long term dynamic modeling of global population and built-up area in a spatially explicit way, HYDE 3 .1, The Holocene,in press.
July 2009. A lower and upper population/land use estimate has been developed. Two papers describing the methodology for the population part and the land use part of HYDE 3.1 are being prepared.
Januari 2009. Finally, the HYDE 3.1 version is released. Global population and land use for the 10 000 B.C. to 2005 A.D. period is available on a 5' resolution (see the download section). There has been a revision of the allcation rules, as well as some minor data input improvements. Work is underway to update the methodology section on this website on this, as well as to complete the accompanying papers for future references.
June 2008. There has been a minor revision of the 'urban area' computations, which were slightly underestimated in the former version of April 2008. This has been corrected and the whole timeseries has been updated because urban area influences the area left over for allocation of cropland and pasture for each grid cell.
April 2008. Finally, work is now completed to extend the HYDE database to cover the whole Holocene, from 10,000 B.C. to 2,000 A.D. Version 3 offers now a unique database of historical population counts, densities, urban and rural counts and urban areas, as well as cropland and pasture estimates on a 5 minute resolution. In co-operation with the Max Planck Institute–Hamburg the long time series of land use maps will be used to perform a millennium run analysis, in order to study the effect of land use change on the climate. Also, results from HYDE 3 will be used in the next scenario effort for IPCC's 5th assessment. Results can be downloaded through the 'Download data' section.
April 2007. An error in the regional emissions tables for CO2, CH4 and SO2 has been corrected. The region (names) of Japan (region 23) and Oceania (region 24) were switched by accident, now they are in the correct order.
June 2007. HYDE has been accepted as an endorsed project within the Global Land Project (GLP), a proposed joint research project for land systems for the International Geosphere-Biosphere Programme (IGBP) and the International Human Dimensions Programme (IHDP). For more information see the Global Land Project website.
Januari 2007. The total historical population data have been revised and updated. A major improvement is the improved level of detail of the input data. Where possible, historical census data were collected at a sub-national adminstrative unit level (e.g. province, state) for all countries of the world. Missing data were estimated by applying population growth rates per administrative unit. Total population counts, densities, as well as urban and rural estimates have been added. All grids are availabe on a 5' x 5' resolution, and with various time intervals. See the Download data section.