CDIAC: Difference between biomass in 1980 and 2000Entry ID: CDIAC_TropicalAfricaWoodyBiomassCarbon1980-2000
Abstract: Maps of biomass density are critical inputs for estimating carbon emissions from deforestation and degradation of tropical forests. Brown and Gatson (1996) pioneered methods to use GIS analysis to map forest biomass based on forest inventory data (ndp055). This database is an update of ndp055 (which represent conditions in circa 1980) and accounts for land cover changes occurring up to the year ... 2000.
This document describes the contents of a digital database containing maximum potential aboveground biomass, land use, and estimated biomass and carbon data for 1980. The biomass data and carbon estimates are associated with woody vegetation in Tropical Africa. These data were collected to reduce the uncertainty associated with estimating historical releases of carbon from land use change. Tropical Africa is defined here as encompassing 22.7 x 106 km2 of the earth's land surface and is comprised of countries that are located in tropical Africa (Angola, Botswana, Burundi, Cameroon, Cape Verde, Central African Republic, Chad, Congo, Benin, Equatorial Guinea, Ethiopia, Djibouti, Gabon, Gambia, Ghana, Guinea, Ivory Coast, Kenya, Liberia, Madagascar, Malawi, Mali, Mauritania, Mozambique, Namibia, Niger, Nigeria, Guinea-Bissau, Zimbabwe (Rhodesia), Rwanda, Senegal, Sierra Leone, Somalia, Sudan, Tanzania, Togo, Uganda, Burkina Faso (Upper Volta), Zaire, and Zambia).
The database was developed using the GRID module in the ARC/INFOTM geographic information system. Source data were obtained from the Food and Agriculture Organization (FAO), the U.S. National Geophysical Data Center, and a limited number of biomass-carbon density case studies. These data were used to derive the maximum potential and actual (ca. 1980) aboveground biomass values at regional and country levels. The land-use data provided were derived from a vegetation map originally produced for the FAO by the International Institute of Vegetation Mapping, Toulouse, France.
Analyses conducted with this database found that 18% of Tropical Africa was classified as closed forest and 36% was classified as open forest in 1980. Forested lands contained over 138 x 109 Mg of aboveground live biomass, which is equivalent to 69 x 109 Mg of carbon. Closed forests and open forests had mean aboveground biomass values of 209 Mg/ha and 67 Mg/ha, respectively, in 1980. These values are down from maximum potential aboveground live biomass values of 296 Mg/ha for closed forest and 108 Mg/ha for open forest.
Credit: Gibbs, H.K. and S. Brown. 2007.
Data Set Citation
Dataset Originator/Creator: Gibbs, H.K. and S. Brown
Dataset Title: Difference between biomass in 1980 and 2000
Dataset Release Date: 2007
Dataset Publisher: Carbon Dioxide Information and Analysis CenterOnline Resource: http://cdiac.ornl.gov/epubs/ndp/ndp055/ndp055b.html
Start Date: 1980-01-01Stop Date: 2000-12-31
BIOSPHERE > TERRESTRIAL ECOSYSTEMS > FORESTS
BIOSPHERE > VEGETATION > BIOMASS
BIOSPHERE > VEGETATION > CARBON
BIOSPHERE > VEGETATION > FOREST COMPOSITION/VEGETATION STRUCTURE
BIOSPHERE > VEGETATION > VEGETATION COVER
LAND SURFACE > LAND USE/LAND COVER > LAND COVER
LAND SURFACE > LAND USE/LAND COVER
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS
ISO Topic Category
Access Constraints None
Use Constraints None
Data Set Progress
Distribution Media: book, CD
Distribution Format: Text
Distribution Media: online, html and pdf
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov
Role: TECHNICAL CONTACT
Email: maggie at wri.org
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Creation and Review Dates
Last DIF Revision Date: 2012-10-17