Articles | Volume 20, issue 8
Research article
19 Apr 2023
Research article |  | 19 Apr 2023

Mapping soil organic carbon fractions for Australia, their stocks, and uncertainty

Mercedes Román Dobarco, Alexandre M. J-C. Wadoux, Brendan Malone, Budiman Minasny, Alex B. McBratney, and Ross Searle

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Cited articles

Aitchison, J.: The Statistical Analysis of Compositional Data, Monographs on statistics and applied probability, Chapman and Hall, 1986. ISBN 10 0412280604, 1986. 
Australian Bureau of Agricultural and Resource Economics and Sciences (ABARES). Land use:, last access: 20 September 2022. 
Averill, C., Turner, B. L., and Finzi, A. C.: Mycorrhiza-mediated competition between plants and decomposers drives soil carbon storage, Nature, 505, 543–545, 2014. 
Baisden, W. T., Amundson, R., Cook, A. C., and Brenner, D. L.: Turnover and storage of C and N in five density fractions from California annual grassland surface soils, Global Biogeochem. Cy., 16, 64-61–64-16,, 2002. 
Short summary
Soil organic carbon (SOC) is of a heterogeneous nature and varies in chemistry, stabilisation mechanisms, and persistence in soil. In this study we mapped the stocks of SOC fractions with different characteristics and turnover rates (presumably PyOC >= MAOC > POC) across Australia, combining spectroscopy and digital soil mapping. The SOC stocks (0–30 cm) were estimated as 13 Pg MAOC, 2 Pg POC, and 5 Pg PyOC.
Final-revised paper