Articles | Volume 6, issue 1
SOIL, 6, 131–144, 2020
https://doi.org/10.5194/soil-6-131-2020
SOIL, 6, 131–144, 2020
https://doi.org/10.5194/soil-6-131-2020

Original research article 06 Apr 2020

Original research article | 06 Apr 2020

Ramped thermal analysis for isolating biologically meaningful soil organic matter fractions with distinct residence times

Jonathan Sanderman and A. Stuart Grandy

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Cited articles

Baisden, W. T., Parfitt, R. L., Ross, C., Schipper, L. A., and Canessa, S.: Evaluating 50 years of time-series soil radiocarbon data: Towards routine calculation of robust C residence times, Biogeochemistry, 112, 129–137, https://doi.org/10.1007/s10533-011-9675-y, 2013. 
Baldock, J. A., Oades, J. M., Nelson, P. N., Skene, T. M., Golchin, A., and Clarke, P.: Assessing the extent of decomposition of natural organic materials using solid-state 13C NMR spectroscopy, Aust. J. Soil Res., 35, 1061–1084, 1997. 
Baldock, J. A., Sanderman, J., Macdonald, L. M., Puccini, A., Hawke, B. A., Szarvas, S., and Mcgowan, J.: Quantifying the allocation of soil organic carbon to biologically significant fractions, Soil Res., 51, 561–576, 2013. 
Buurman, P., Peterse, F., and Almendros Martin, G.: Soil organic matter chemistry in allophanic soils: a pyrolysis-GC/MS study of a Costa Rican Andosol catena, Eur. J. Soil Sci., 58, 1330–1347, 2007. 
Cécillon, L., Baudin, F., Chenu, C., Houot, S., Jolivet, R., Kätterer, T., Lutfalla, S., Macdonald, A., van Oort, F., Plante, A. F., Savignac, F., Soucémarianadin, L. N., and Barré, P.: A model based on Rock-Eval thermal analysis to quantify the size of the centennially persistent organic carbon pool in temperate soils, Biogeosciences, 15, 2835–2849, https://doi.org/10.5194/bg-15-2835-2018, 2018. 
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Short summary
Soils contain one of the largest and most dynamic pools of carbon on Earth, yet scientists still struggle to understand the reactivity and fate of soil organic matter upon disturbance. In this study, we found that with increasing thermal stability, the turnover time of organic matter increased from decades to centuries with a concurrent shift in chemical composition. In this proof-of-concept study, we found that ramped thermal analyses can provide new insights for understanding soil carbon.