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The methodology used during this project took place in five stages, some of which ran concurrently. The figure below shows how the stages relate to each other.

STAGE 1. Was to identify time series datasets that have measured soil organic carbon in India, Brazil, Kenya and Jordan and to use these to evaluate and refine two existing models Roth-C and CENTURY. The models were run to see how well they could simulate these datasets. During this stage refinements made included the creation of new and modification of existing crop and forestry files in the Century model.

STAGE 2. Was to Collate and format national and sub-national scale soils, climate and land-use datasets. These were used to create GIS coverages needed to run the GEFSOC Modelling System.

STAGE 3. Was the development of the system itself which comprises of a Graphical User Interface (GUI) and a set of program modules that run Century, RothC and the IPCC method.

STAGE 4. Was to use the system to estimate current soil organic carbon stocks for the  Indian part of the Indo-Gangetic Plains, Jordan, Kenya and Amazon-Brazil and to compare these with estimates made using existing techniques for estimating national scale soil carbon stocks (e.g. combining soil mapping units and interpolating point data)

STAGE 5. Was to develop plausible land use change scenarios for India, Brazil, Jordan and Kenya. Current and historical land use was based on a variety of sources including government statistics and census data. Future land use change was based on an FAO report (World Agriculture: Towards 2015/2030) supplemented with national information on future land use plans. The system was then used to quantify the impact of defined land use changes on SOC in the four case study countries.

The information has been made available through workshops, project reports and publications with the hope that it will  be used in the development of land-use change policy formulation in each of the case study countries.


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Last updated: 20 March 2007.