The Pyrogenic Carbon Cycle

DOI Web Site 6 Citations
  • Michael I. Bird
    School of Earth and Environmental Sciences and Center for Tropical Environmental and Sustainability Science, James Cook University, Cairns, Queensland 4870, Australia;
  • Jonathan G. Wynn
    School of Geosciences, University of South Florida, Tampa, Florida 33620
  • Gustavo Saiz
    Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, 82467 Garmisch-Partenkirchen, Germany
  • Christopher M. Wurster
    School of Earth and Environmental Sciences and Center for Tropical Environmental and Sustainability Science, James Cook University, Cairns, Queensland 4870, Australia;
  • Anna McBeath
    School of Earth and Environmental Sciences and Center for Tropical Environmental and Sustainability Science, James Cook University, Cairns, Queensland 4870, Australia;

Description

<jats:p> Pyrogenic carbon (PyC; includes soot, char, black carbon, and biochar) is produced by the incomplete combustion of organic matter accompanying biomass burning and fossil fuel consumption. PyC is pervasive in the environment, distributed throughout the atmosphere as well as soils, sediments, and water in both the marine and terrestrial environment. The physicochemical characteristics of PyC are complex and highly variable, dependent on the organic precursor and the conditions of formation. A component of PyC is highly recalcitrant and persists in the environment for millennia. However, it is now clear that a significant proportion of PyC undergoes transformation, translocation, and remineralization by a range of biotic and abiotic processes on comparatively short timescales. Here we synthesize current knowledge of the production, stocks, and fluxes of PyC as well as the physical and chemical processes through which it interacts as a dynamic component of the global carbon cycle. </jats:p>

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