Quantifying CO2 uptake and biological productivity in the southern hemisphere oceans using atmospheric observations ...

• Main Author: Roy, TM
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Southern Ocean
• Online Access: https://dx.doi.org/10.25959/23245244.v1; https://figshare.utas.edu.au/articles/thesis/Quantifying_CO2_uptake_and_biological_productivity_in_the_southern_hemisphere_oceans_using_atmospheric_observations/23245244/1

In this thesis, the use of atmospheric observations for quantifying the uptake of `CO_2` and biological production in the Southern Ocean is explored. For both these processes, ocean observations appear insufficient to accurately quantify their magnitude and variability. It has been proposed that atmospheric observations would provide a better constraint. In the first section, we use an atmospheric inversion model to combine atmospheric and oceanic observations to investigate the southern hemisphere ocean `CO_2` uptake. From sensitivity studies that vary both the initial ocean flux distribution and the atmospheric data used in the inversion, our inversion predicts a total (ocean and land) uptake of \\(1.65\\) to \\(1.90\\) \\(GtC\\) `y^-1`. We assess the consistency between the mean southern hemisphere `CO_2` ocean uptake predicted by an atmospheric inversion model for the 1991-1997 period and the ocean flux estimate based on observed `‚Äöv†vúC0_2`, as in Takahashi et al. (2002). In the Takahashi et al. ...