Articles | Volume 21, issue 23
Atmos. Chem. Phys., 21, 17453–17494, 2021
https://doi.org/10.5194/acp-21-17453-2021
Atmos. Chem. Phys., 21, 17453–17494, 2021
https://doi.org/10.5194/acp-21-17453-2021

Research article 01 Dec 2021

Research article | 01 Dec 2021

Was Australia a sink or source of CO2 in 2015? Data assimilation using OCO-2 satellite measurements

Yohanna Villalobos et al.

Data sets

Data associated with the publication "Was Australia a sink or source of CO2 in 2015? Data assimilation using OCO-2 satellite measurements" Y. Villalobos, P. J. Rayner, J. D., Silver, S. Thomas, V. Haverd, J. Knauer, Z. M. Loh, N. M. Deutscher, D. W. T. Griffith, and D. F. Pollard https://doi.org/10.5281/zenodo.5636113

Model code and software

Python 4-dimensional variational data assimilation tool S. Thomas https://github.com/steven-thomas/py4dvar

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Short summary
Semi-arid ecosystems such as those in Australia are evolving and might play an essential role in the future of climate change. We use carbon dioxide concentrations derived from the OCO-2 satellite instrument and a regional transport model to understand if Australia was a carbon sink or source of CO2 in 2015. Our research's main findings suggest that Australia acted as a carbon sink of about −0.41 ± 0.08 petagrams of carbon in 2015, driven primarily by savanna and sparsely vegetated ecosystems.
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