This project aims to develop and demonstrate generic tools which quantify the impact of land management and climate scenarios on carbon sequestration in soils. Specific research objectives include:

• (i) identify and use long-term experimental datasets to systematically evaluate and refine modeling techniques to quantify carbon sequestration potential in tropical soils;

• (ii) define, collate and format national-scale soils, climate and land-use datasets and to use them in the development of coupled modeling-GIS tools to estimate soil carbon stocks;

• (iii) demonstrate these tools by estimating current soil organic carbon stocks at country-scale (using India, Jordan, Kenya and Amazon-Brazil as case studies) and to compare these estimates with the existing techniques of combining soil mapping units and interpolating point data; and

• (iv) quantify the impact of defined changes in land use on carbon sequestration in soils with a view to assisting in the formulation of improved policies to optimize resource use in the four case-study countries Brazil, India, Jordan and Kenya.