Impact of air pollution on wet deposition of mineral dust aerosols

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Read Full Article (file size: 252997 bytes) Cited by GEOPHYSICAL RESEARCH LETTERS, VOL. 31, L02104, doi:10.1029/2003GL018501, 2004 Impact of air pollution on wet deposition of mineral dust aerosols Song-Miao Fan NOAA Geophysical Fluid Dynamics Laboratory, Princeton University, Princeton, New Jersey, USA Larry W. Horowitz NOAA Geophysical Fluid Dynamics Laboratory, Princeton University, Princeton, New Jersey, USA Hiram Levy II NOAA Geophysical Fluid Dynamics Laboratory, Princeton University, Princeton, New Jersey, USA Walter J. Moxim NOAA Geophysical Fluid Dynamics Laboratory, Princeton University, Princeton, New Jersey, USA Abstract Mineral dust aerosols originating from arid regions are simulated in an atmospheric global chemical transport model. Based on model results and observations of dust concentration, we hypothesize that air pollution increases the scavenging of dust by producing high levels of readily soluble materials on the dust surface, which makes dust aerosols effective cloud condensation nuclei (CCN). This implies that air pollution could have caused an increase of dust deposition to the coastal oceans of East Asia and a decrease by as much as 50% in the eastern North Pacific. Received 26 August 2003; accepted 10 December 2003; published 17 January 2004. Index Terms: 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801); 0312 Atmospheric Composition and Structure: Air/sea constituent fluxes (3339, 4504); 0320 Atmospheric Composition and Structure: Cloud physics and chemistry; 0330 Atmospheric Composition and Structure: Geochemical cycles; 0368 Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry. Read Full Article (file size: 252997 bytes) Cited by Citation: Fan, S.-M., L. W. Horowitz, H. Levy II, and W. J. Moxim (2004), Impact of air pollution on wet deposition of mineral dust aerosols, Geophys. Res. Lett., 31, L02104, doi:10.1029/2003GL018501. This paper is not subject to U.S. copyright. Published in 2004 by the American Geophysical Union.

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