Journal article

The potential of Orbiting Carbon Observatory-2 data to reduce the uncertainties in CO2 surface fluxes over Australia using a variational assimilation scheme

Yohanna Villalobos, Peter Rayner, Steven Thomas, Jeremy Silver

Atmospheric Chemistry and Physics | COPERNICUS GESELLSCHAFT MBH | Published : 2020

Abstract

This paper addresses the question of how much uncertainties in CO2 fluxes over Australia can be reduced by assimilation of total-column carbon dioxide retrievals from the Orbiting Carbon Observatory-2 (OCO-2) satellite instrument. We apply a four-dimensional variational data assimilation system, based around the Community Multiscale Air Quality (CMAQ) transport-dispersion model. We ran a series of observing system simulation experiments to estimate posterior error statistics of optimized monthly-mean CO2 fluxes in Australia. Our assimilations were run with a horizontal grid resolution of 81 km using OCO-2 data for 2015. Based on four representative months, we find that the integrated flux un..

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Grants

Awarded by National Commission for Scientific and Technological Research (CONICYT) scholarship, Becas Chile


Awarded by Australian Research Council (ARC) of the Centre of Excellence for Climate Extreme (CLEX)


Funding Acknowledgements

This research has been supported by the National Commission for Scientific and Technological Research (CONICYT) scholarship, Becas Chile (grant no. 72170210), 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).