Carbon export and the uptake of anthropogenic CO\\(_2\\) in the Southern Ocean using stable carbon isotopes of dissolved inorganic carbon ...
The main objective of this research was to investigate and better understand carbon cycling in the Southern Ocean. Measurements of Dissolved Inorganic Carbon (DIC) and its stable carbon isotopes were used to quantify both carbon export and the accumulation and uptake of anthropogenic CO\\(_2\\) in t...
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| Format: | Thesis |
| Language: | unknown |
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University Of Tasmania
2023
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| Online Access: | https://dx.doi.org/10.25959/23230328 https://figshare.utas.edu.au/articles/thesis/Carbon_export_and_the_uptake_of_anthropogenic_CO_2_in_the_Southern_Ocean_using_stable_carbon_isotopes_of_dissolved_inorganic_carbon/23230328 |
| Summary: | The main objective of this research was to investigate and better understand carbon cycling in the Southern Ocean. Measurements of Dissolved Inorganic Carbon (DIC) and its stable carbon isotopes were used to quantify both carbon export and the accumulation and uptake of anthropogenic CO\\(_2\\) in the Australian sector of the Southern Ocean. To determine carbon export, we measured DIC and ˜í¬•\\(^{13}\\)C\\(_{DIC}\\) on five cruises which cover winter and summer conditions in the sub-Antarctic zone (SAZ), South of Australia. Seasonal variations in mixed layer DIC (45˜í¬¿mol/kg) and ˜í¬•\\(^{13}\\)C\\(_{DIC}\\) (0.45‚ÄövÑ‚àû) in the region were large. Biological production contributed to about 80% of the winter to summer mixed layer carbon changes in the SAZ with air-sea exchange (10%) and mixing (10%) having smaller contributions. The integrated biological carbon export from the mixed layer from July to February was largest in the northern SAZ (45¬¨‚àûS-47¬¨‚àûS) at 3400mmol/m\\(^2\\) and decreased to ... |
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