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ToolsChance, Rosemary, Shelley, Rachel and Baker, Alex (2026) Southern South American dust inputs to the South Atlantic and Southern Oceans: trace element solubility and deposition fluxes. Global Biogeochemical Cycles, 40 (2). ISSN 0886-6236
Full text not available from this repository. (Request a copy)Abstract
Southern South America (SSA) is an important source of dust, and its associated micronutrient trace elements, to the waters of the Southern Ocean. As part of the UK contribution to the International GEOTRACES program, an aerosol sampling site (Carcass Island) was established in the western Falkland (Malvinas) Islands, downwind of dust sources in Patagonia. Samples were collected over two 7-month long periods and analyzed for soluble and total trace elements. Results indicated that dust was the dominant source of aerosol iron and manganese, elements with limiting or co-limiting roles for Southern Ocean primary productivity. Other micronutrient trace elements (e.g., copper and zinc) appeared to be more strongly affected by anthropogenic inputs, even in this sparsely populated region. Trace element fractional solubility at Carcass Island appears consistent with previous observations over the wider Atlantic Ocean. In the case of iron, a hyperbolic increase in solubility with decreasing atmospheric iron concentration was observed. This relationship has been suggested to indicate enhancement of solubility during atmospheric transport, but the very little available information on iron solubility in the region makes this difficult to verify. Soluble manganese to iron ratios in aerosols at Carcass Island suggest that deposition of SSA dust is unable to alleviate Mn deficiency in the waters of the Atlantic sector of the Southern Ocean.
| Item Type: | Article |
|---|---|
| Additional Information: | Data Availability Statement The data reported here are available from the British Oceanographic Data Centre (Baker et al., 2025). For the purpose of open access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission |
| Uncontrolled Keywords: | patagonia,southern ocean,aerosols,solubility,trace elements,environmental science(all),global and planetary change,environmental chemistry,atmospheric science ,/dk/atira/pure/subjectarea/asjc/2300 |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences University of East Anglia Research Groups/Centres > Theme - ClimateUEA |
| UEA Research Groups: | Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 10 Mar 2026 14:30 |
| Last Modified: | 16 Mar 2026 10:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/102288 |
| DOI: | 10.1029/2025GB009011 |
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