Articles | Volume 17, issue 24
https://doi.org/10.5194/bg-17-6457-2020
https://doi.org/10.5194/bg-17-6457-2020
Research article
 | 
22 Dec 2020
Research article |  | 22 Dec 2020

Vertical mobility of pyrogenic organic matter in soils: a column experiment

Marcus Schiedung, Severin-Luca Bellè, Gabriel Sigmund, Karsten Kalbitz, and Samuel Abiven

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Cited articles

Abiven, S. and Santín, C.: Editorial: From Fires to Oceans: Dynamics of Fire-Derived Organic Matter in Terrestrial and Aquatic Ecosystems, Front. Earth Sci., 7, 31, https://doi.org/10.3389/feart.2019.00031, 2019. 
Abiven, S., Hengartner, P., Schneider, M. P. W., Singh, N., and Schmidt, M. W. I.: Pyrogenic carbon soluble fraction is larger and more aromatic in aged charcoal than in fresh charcoal, Soil Biol. Biochem., 43, 1615–1617, https://doi.org/10.1016/j.soilbio.2011.03.027, 2011. 
Abney, R. B., Kuhn, T. J., Chow, A., Hockaday, W., Fogel, M. L., and Berhe, A. A.: Pyrogenic carbon erosion after the Rim Fire, Yosemite National Park: The Role of Burn Severity and Slope, J. Geophys. Res.-Biogeo., 124, 432–449, https://doi.org/10.1029/2018JG004787, 2019. 
Bao, H., Niggemann, J., Huang, D., Dittmar, T., and Kao, S. J.: Different Responses of Dissolved Black Carbon and Dissolved Lignin to Seasonal Hydrological Changes and an Extreme Rain Event, J. Geophys. Res.-Biogeo., 124, 479–493, https://doi.org/10.1029/2018JG004822, 2019. 
Barnes, R. T., Gallagher, M. E., Masiello, C. A., Liu, Z., and Dugan, B.: Biochar-induced changes in soil hydraulic conductivity and dissolved nutrient fluxes constrained by laboratory experiments, PLoS One, 9, e108340, https://doi.org/10.1371/journal.pone.0108340, 2014. 
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Short summary
The mobility of pyrogenic organic matter (PyOM) in soils is largely unknow, while it is a major and persistent component of the soil organic matter. With a soil column experiment, we identified that only a small proportion of PyOM can migrate through the soil, but its export is continuous. Aging and associated oxidation increase its mobility but also its retention in soils. Further, PyOM can alter the vertical mobility of native soil organic carbon during its downward migration.
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