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AGU: Journal of Geophysical Research, Atmospheres

 

Index Terms

  • Oceanography: Physical: Ocean fog and aerosols
  • Oceanography: Biological and Chemical: Aerosols
  • Atmospheric Composition and Structure: Ion chemistry of the atmosphere
  • Atmospheric Composition and Structure: Aerosols and particles
  • Atmospheric Composition and Structure: Troposphere—composition and chemistry
Abstract
Cited By (4)
 

Abstract

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 108, 4120, 9 PP., 2003
doi:10.1029/2002JD002329

Aerosol size distribution during sea fog and its scavenge process of chemical substances over the northwestern North Pacific

Motoki Sasakawa

Ocean Research Institute, University of Tokyo, Nakano-ku, Tokyo, Japan

Atsushi Ooki

Ocean Research Institute, University of Tokyo, Nakano-ku, Tokyo, Japan

Mitsuo Uematsu

Ocean Research Institute, University of Tokyo/CREST, Japan Science and Technology, Nakano-ku, Tokyo, Japan

We investigated the chemical characteristics of sea fog and its generation mechanism over the northwestern North Pacific from 28 June to 10 July 2001. Continuous aerosol number measurements revealed that sea fog scavenged coarse particles (d > 0.50 μm) more efficiently than fine particles (d < 0.50 μm). Although there was no relationship between Na+ concentration and sea fog age, anthropogenic ions concentrations (NO3−, nss-SO42−, and NH4+) decreased with an increase in sea fog age. Compared with nss-SO42− and NH4+, NO3− was selectively removed by sea fog. Coarse particles (sea-salt and NaNO3) act as condensation nuclei (CN) of sea fog droplets more preferentially than fine particles (H2SO4, (NH4)HSO4 and (NH4)2SO4) because of the effect of curvature. This is in harmony with the result of aerosol number measurement.

Published 11 February 2003.

Citation: Sasakawa, M., A. Ooki, and M. Uematsu (2003), Aerosol size distribution during sea fog and its scavenge process of chemical substances over the northwestern North Pacific, J. Geophys. Res., 108(D3), 4120, doi:10.1029/2002JD002329.

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