Variations in optical and microphysical characteristics of aerosol along the route of Russian Antarctic Expeditions in the East Atlantic
S.M. Sakerin1, D.M. Kabanov1, V.V. Polkin1, V.F. Radionov2, B.N. Holben3, A. Smirnov3
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2Arctic and Antarctic Research Institute, 199397, St. Petersburg, ul. Behring, 38, Russia
3NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
Keywords: аэрозольная оптическая толща, концентрации аэрозоля и «сажи», пространственное распределение, Восточная Атлантика, Южный океан, aerosol optical depth, aerosol and black carbon concentrations, spatial distribution, East Atlantic, Southern Ocean
Abstract
The 12-year aerosol studies along the route of the Russian Antarctic Expeditions in the East Atlantic and the Southern Ocean are summarized. We analyzed the spatial distribution (with 5o latitudinal step), seasonal (November/April) variations, and interrelations between aerosol optical and microphysical characteristics. It is shown that the latitudinally average variations in aerosol parameters in the East Atlantic exceed one order of magnitude. The lowest (maximal) values are observed near Antarctica (in tropical zone): aerosol optical depth (0.5 μm) varies from 0.02 to 0.5, number concentrations of small particles (d = 0.4-1 μm) vary in the range 0.8-19 cm-3, concentrations of large (d > 1 μm) particles vary in the range 0.04-2.2 cm-3, and aerosol and black carbon mass concentrations vary in ranges 0.5-14 μg/m3 and 0.026-0.7 μg/m3, respectively.
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