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Assessment of soil organic carbon in semi-arid Sudan using GIS and the CENTURY model
 

Summary: Assessment of soil organic carbon in semi-arid Sudan
using GIS and the CENTURY model
Jonas Ardo¨%*
& Lennart Olssonw
%
Department of Physical Geography, Lund University, Box 118,
S-221 00 Lund, Sweden
wCenter for Environmental Studies, Lund University, Box 170,
S-221 00 Lund, Sweden
(Received 13 December 2001; received in revised form 17 July 2002; accepted 27 July 2002)
Using the UNFCCC as a basis, and the objectives of estimating soil organic
carbon (SOC) changes during the period 1900­2100, a spatially explicit
database of climate, land cover and soil texture was compiled for a
262,000 km2
region in semi-arid Sudan. The area is characterized by low
input cultivation of millet, sorghum and sesame´ combined with livestock
grazing. By integrating the database with the CENTURY ecosystem model,
we were able to estimate historical, current and future pools of SOC as a
function of land management and climate.
The SOC (upper 20 cm) decrease from 1900 to 2000 was estimated to be

  

Source: Ardö, Jonas - Department of Earth and Ecosystem Sciences, Lunds Universitet

 

Collections: Environmental Sciences and Ecology; Geosciences