National estimation of soil organic carbon storage potential for arable soils: A data-driven approach coupled with carbon-landscape zones

The Science of the Total Environment
Songchao ChenChristian Walter

Abstract

Soil organic carbon (SOC) is important for its contributions to agricultural production, food security, and ecosystem services. Increasing SOC stocks can contribute to mitigate climate change by transferring atmospheric CO2 into long-lived soil carbon pools. The launch of the 4 per 1000 initiative has resulted in an increased interest in developing methods to quantity the additional SOC that can be stored in soil under different management options. In this work, we have made a first attempt to estimate SOC storage potential of arable soils using a data-driven approach based on the French National Soil Monitoring Network. The data-driven approach was used to determine the maximum SOC stocks of arable soils for France. We first defined different carbon-landscape zones (CLZs) using clustering analysis. We then computed estimates of the highest possible values using percentile of 0.8, 0.85, 0.9 and 0.95 of the measured SOC stocks within these CLZs. The SOC storage potential was calculated as the difference between the maximum SOC stocks and current SOC stocks for topsoil and subsoil. The percentile used to determine highest possible SOC had a large influence on the estimates of French national SOC storage potential. When the percen...Continue Reading

References

Jun 18, 2003·Journal of Environmental Quality·G SparlingL A Schipper
Aug 8, 2009·Science·Pedro A SanchezGan-Lin Zhang
Apr 15, 2016·Nature·Keith PaustianPete Smith
Jul 21, 2016·The Science of the Total Environment·V L MulderD Arrouays
Apr 21, 2017·Environmental Science & Technology·Jan Willem van GroenigenKees Jan van Groenigen
Feb 27, 2018·The Science of the Total Environment·Songchao ChenDominique Arrouays

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