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

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

doi:https://doi.org/10.5194/bg-20-1559-2023

Articles | Volume 20, issue 8

https://doi.org/10.5194/bg-20-1559-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-20-1559-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

Supplement

https://doi.org/10.5194/bg-20-1559-2023-supplement

Data sets

SOC fractions SLGA Version 2 Mercedes Román Dobarco, Alexandre M.J-C. Wadoux, Brendan Malone, Budiman Minasny, Alex B. McBratney, and Ross Searle https://data.tern.org.au/landscapes/slga/NationalMaps

Model code and software

SOC fractions - scripts Mercedes Roman, Alexandre Wadoux, Brendan Malone, Ross Searle https://github.com/AusSoilsDSM/SLGA/tree/main/Production/DSM

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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.