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JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 112, D10220, doi:10.1029/2006JD007947, 2007

Aerosol optical and microphysical properties over the Atlantic Ocean during the 19th cruise of the Research Vessel Akademik Sergey Vavilov

S. M. Sakerin

Institute of Atmospheric Optics, Russian Academy of Sciences, Siberian Branch, Tomsk, Russia


A. Smirnov

Goddard Earth Sciences and Technology Center, University of Maryland Baltimore County, Baltimore, Maryland, USA
Biospheric Sciences Branch, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA


D. M. Kabanov

Institute of Atmospheric Optics, Russian Academy of Sciences, Siberian Branch, Tomsk, Russia


V. V. Pol'kin

Institute of Atmospheric Optics, Russian Academy of Sciences, Siberian Branch, Tomsk, Russia


M. V. Panchenko

Institute of Atmospheric Optics, Russian Academy of Sciences, Siberian Branch, Tomsk, Russia


B. N. Holben

Biospheric Sciences Branch, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA


O. V. Kopelevich

P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia


Abstract

This paper presents aerosol optical depths in the total atmospheric column, aerosol size distributions, number concentrations and black carbon mass concentrations at the deck level measured in October–December 2004 on board the R/V Akademik Sergey Vavilov. Aerosol optical depths measured within the spectral range 0.34–4.0 μm were close to background oceanic conditions (∼0.04–0.08) in the high-latitude southern Atlantic. Angstrom parameters derived within 440–870 nm and 870–2150 nm spectral ranges did not exceed 0.6, yielding averages of 0.34 and 0.12, respectively. The mass concentration of black carbon varied within the range 0.02–0.08 μg/m3 in the 34–55°S latitudinal belt. The average of 0.04 μg/m3 (s.d. ∼0.015) is close to the reported results for the remote areas of the South Indian Ocean. Aerosol volume size distributions measured within the size range of 0.4–10 μm can be characterized by a geometric volume mean radius ∼3 μm. This is consistent with the columnar retrievals reported by the Aerosol Robotic Network (AERONET).

Received 22 August 2006; accepted 28 February 2007; published 26 May 2007.

Keywords: aerosol optical depth; aerosol black carbon; aerosol concentration.

Index Terms: 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801, 4906); 0345 Atmospheric Composition and Structure: Pollution: urban and regional (0305, 0478, 4251); 0360 Atmospheric Composition and Structure: Radiation: transmission and scattering; 1640 Global Change: Remote sensing (1855); 4548 Oceanography: Physical: Ocean fog.

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Citation: Sakerin, S. M., A. Smirnov, D. M. Kabanov, V. V. Pol'kin, M. V. Panchenko, B. N. Holben, and O. V. Kopelevich (2007), Aerosol optical and microphysical properties over the Atlantic Ocean during the 19th cruise of the Research Vessel Akademik Sergey Vavilov, J. Geophys. Res., 112, D10220, doi:10.1029/2006JD007947.