The GEFSOC soil carbon modelling system: A tool for conducting regional-scale soil carbon inventories and assessing the impacts of land use change on soil carbon

The GEFSOC soil carbon modelling system was built to provide interdisciplinary teams of scientists, natural resource managers and policy analysts (who have the appropriate computing skills) with the necessary tools to conduct regional-scale soil carbon (C) inventories. It allows users to assess the effects of land use change on soil organic C (SOC) stocks, soil fertility and the potential for soil C sequestration. The tool was developed in conjunction with case-studies of land use and management impacts on SOC in Brazil, Jordan, Kenya and India, which represent a diversity of land use and land management patterns and are countries where sustaining soil organic matter and fertility for food security is an on-going problem. The tool was designed to run using two common desktop computers, connected via a local area network. It utilizes open-source software that is freely available. All new software and user interfaces developed for the tool are available in an open source environment allowing users to examine system details, suggest improvements or write additional modules to interface with the system. The tool incorporates three widely used models for estimating soil C dynamics: (1) the Century ecosystem model; (2) the RothC soil C decomposition model; and (3) the Intergovernmental Panel on Climate Change (IPCC) method for assessing soil C at regional scales. The tool interacts with a Soil and Terrain Digital Database (SOTER) built for the specific country or region the user intends to model. A demonstration of the tool and results from an assessment of land use change in a sample region of North America are presented.

[1]  W. Parton,et al.  Analysis of factors controlling soil organic matter levels in Great Plains grasslands , 1987 .

[2]  C. W. Lindwall,et al.  Changes in total, mineralizable and light fraction soil organic matter with cropping and tillage intensities in semiarid southern Alberta, Canada , 1997 .

[3]  Wilfred M. Post,et al.  The use of models to integrate information and understanding of soil C at the regional scale , 1997 .

[4]  Keith Paustian,et al.  Soil organic carbon as an indicator of environmental quality at the national scale: Inventory monitoring methods and policy relevance , 2005 .

[5]  Keith Paustian,et al.  Modeling soil organic matter in organic-amended and nitrogen-fertilized long-term plots , 1992 .

[6]  Tom Addiscott,et al.  Quantitative methods to evaluate and compare Soil Organic Matter (SOM) Models , 1996 .

[7]  W. Parton,et al.  ECOLOGICAL IMPACT OF HISTORICAL LAND-USE PATTERNS IN THE GREAT PLAINS: A METHODOLOGICAL ASSESSMENT , 2005 .

[8]  H. Tiessen,et al.  Limited applicability of the CENTURY model to highly weathered tropical soils , 1996 .

[9]  Martial Bernoux,et al.  Predicted soil organic carbon stocks and changes in the Brazilian Amazon between 2000 and 2030 , 2007 .

[10]  Eric A. Davidson,et al.  Changes in soil carbon inventories following cultivation of previously untilled soils , 1993 .

[11]  Anthony W. King,et al.  The Potential Response of Terrestrial Carbon Storage to Changes in Climate and Atmospheric CO2 , 1997 .

[12]  Pete Smith,et al.  The GCTE SOMNET: A global network and database of soil organic matter models and long-term datasets , 1995 .

[13]  N. Batjes,et al.  Preparation of consistent soil data sets for modelling purposes : Secondary SOTER data for four case study areas , 2007 .

[14]  Martial Bernoux,et al.  National and sub-national assessments of soil organic carbon stocks and changes: The GEFSOC modelling system , 2007 .

[15]  F. Wagner,et al.  Good Practice Guidance for Land Use, Land-Use Change and Forestry , 2003 .

[16]  N. Batjes.  A taxotransfer rule-based approach for filling gaps in measured soil data in primary SOTER databases , 2003 .

[17]  Keith Paustian,et al.  Agricultural soil greenhouse gas emissions: a review of national inventory methods. , 2006, Journal of environmental quality.

[18]  David S. Powlson,et al.  Evaluation of Soil Organic Matter Models using Existing, Long-Term Datasets , 1996 .

[19]  K. Paustian,et al.  Evaluation of two soil carbon models using two Kenyan long term experimental datasets , 2007 .

[20]  Rattan Lal,et al.  Agricultural Practices and Policies for Carbon Sequestration in Soil , 2002 .

[21]  Tom Addiscott,et al.  Critical Evaluation of Models and Their Parameters , 1995 .

[22]  Keith Paustian,et al.  Uncertainty in estimating land use and management impacts on soil organic carbon storage for US agricultural lands between 1982 and 1997 , 2003 .

[23]  K. Paustian,et al.  Analysis and Reporting of Carbon Sequestration and Greenhouse Gases for Conservation Districts in Iowa , 2002 .

[24]  C. Daly,et al.  A Statistical-Topographic Model for Mapping Climatological Precipitation over Mountainous Terrain , 1994 .

[25]  K. Paustian,et al.  Soil Organic Matter in Temperate Agroecosystems , 1997 .

[26]  K. Paustian,et al.  State Level Analyses of C Sequestration in Agricultural Soils , 2002 .

[27]  S. K. Ray,et al.  Modelled soil organic carbon stocks and changes in the Indo-Gangetic Plains, India from 1980 to 2030 , 2007 .

[28]  K. Paustian,et al.  Predicted soil organic carbon stocks and changes in Kenya between 1990 and 2030 , 2007 .

[29]  W. Parton,et al.  Dynamics of C, N, P and S in grassland soils: a model , 1988 .

[30]  Philip Smith,et al.  Regional estimates of carbon sequestration potential: linking the Rothamsted Carbon Model to GIS databases , 1998, Biology and Fertility of Soils.

[31]  E. Vance,et al.  Calculating net primary production and annual input of organic matter to soil from the amount and radiocarbon content of soil organic matter , 1992 .

[32]  Timothy G. F. Kittel,et al.  Development of simplified ecosystem models for applications in Earth system studies: The Century experience , 1992 .

[33]  C. Cerri,et al.  Soil carbon stocks at regional scales , 2007 .