Abstract
The study of the particle size distribution in the near-water aerosol, as well as suspended particulate matter (SPM) and organic compounds (OCs) in SPM in the surface waters of the South and Atlantic oceans showed that in the near-water atmosphere the minimum number of particles was found in the coastal regions of Antarctica due to the ice cover on the continent (for 0.3–1 μm particles, on average, 6182 particles/L). The maximum amount of aerosols (on average 28186, maximum 55389 particles/L) confined to coastal Europe is related to their influx from industrial areas and shipping. The latter led to a chaotic change in the concentrations of aerosols and OCs in surface waters (up to 70 μg/L, 214 μg/mg SPM for hydrocarbons in the English Channel). The fluxes from Patagonia and the African deserts lead to an increase of aerosols up to 33 824–34 893 particles/L, where they have the greatest effect, due to the mineral nature, on the SPM distribution in surface waters. The distribution of aerosols on the Africa–Antarctica section was mainly controlled by the frontal zones of surface waters; therefore, their content correlated with the speed of the wind blowing them out from the sea surface: r = 0.82. The La Plata River–Atlantic Ocean geochemical barrier affects the variability of the OCs and SPM concentrations in the surface water of the Montevideo area, where the SPM content varied from 0.23 to 1.3 mg/L, and HCs, from 7 to 48 μg/L (up to 37 μg/mg SPM).
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ACKNOWLEDGMENTS
We are grateful to A.M. Titova and N.V. Kozina for sampling. A.A. Kramtsova is thanked for help in the performance of analysis and graphical processing of results.
Funding
The results of studies were obtained in the framework of the government-financed task (project no. FMWE-2021-0016). Participation in the cruise was supported by the Russian Arctic Expedition, while generalization of results and preparation of the manuscript were supported by the Russian Science Foundation (project no. 19-17-00234-P).
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Translated by M. Bogina
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Nemirovskaya, I.A. Distribution and Composition of Suspended Particulate Matters at the Atmosphere–Water Boundary (South and Atlantic Oceans). Geochem. Int. 60, 995–1004 (2022). https://doi.org/10.1134/S001670292209004X
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DOI: https://doi.org/10.1134/S001670292209004X