Journal article
Was Australia a sink or source of CO2in 2015? Data assimilation using OCO-2 satellite measurements
Y Villalobos, PJ Rayner, JD Silver, S Thomas, V Haverd, J Knauer, ZM Loh, NM Deutscher, DWT Griffith, DF Pollard
Atmospheric Chemistry and Physics | Published : 2021
Abstract
In this study, we present the assimilation of data from the Orbiting Carbon Observatory-2 (OCO-2) (land nadir and glint data, version 9) to estimate the Australian carbon surface fluxes for the year 2015. To perform this estimation, we used both a regional-scale atmospheric transport-dispersion model and a four-dimensional variational assimilation scheme. Our results suggest that Australia was a carbon sink of -0.41±0.08PgCyr-1 compared to the prior estimate 0.09±0.20PgCyr-1 (excluding fossil fuel emissions). Most of the carbon uptake occurred in northern Australia over the savanna ecotype and in the western region over areas with sparse vegetation. Analysis of the enhanced vegetation index ..
View full abstractRelated Projects (2)
Grants
Awarded by National Aeronautics and Space Administration
Funding Acknowledgements
This research has been supported by the National Agency for Research and Development (ANID) scholarship, Becas Chile (grant no. 72170210) and supported by the Education Infrastructure Fund of the Australian Government and the Australian Research Council (ARC) of the Centre of Excellence for Climate Extreme (CLEX, grant no. CE170100023). Darwin and Wollongong TCCON stations are supported by ARC grant nos. DP160100598, LE0668470, DP140101552, DP110103118 and DP0879468, and Darwin through NASA grant nos. NAG5-12247 and NNG05-GD07G. Nicholas M. Deutscher is funded by an ARC Future Fellowship, grant no. FT180100327.