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Marine boundary layer dust and pollutant transport associated with the passage of a frontal system over eastern Asia
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA
Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA
Center for Global and Regional Environmental Research, University of Iowa, Iowa City, Iowa, USA
Research Institute for Applied Mechanics, Kyushu University, Kasuga, Japan
Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, USA
Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, USA
Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, USA
Department of Environmental Engineering, Princeton University, Princeton, New Jersey, USA
Department of Chemical Engineering, Princeton University, Princeton, New Jersey, USA
Center for Atmospheric Chemistry Studies, Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island, USA
Aerosol chemical composition and number size distributions were measured aboard the R/V Ronald H. Brown during the Asian Pacific Regional Aerosol Characterization Experiment (ACE-Asia) from 14 March to 20 April 2001. This manuscript focuses on the prefrontal and postfrontal air masses sampled aboard the ship in the Sea of Japan between 6 and 15 April 2001 to illustrate the different chemical sources/mixtures off the coast of Asia resulting from the contrasting meteorological transport patterns. The prefrontal air masses had a dominant accumulation mode composed of pollution and volcanic aerosols. The aerosol was predominately ammonium sulfate and organic carbon. Minor amounts of dust were present in the marine boundary layer (MBL) as a result of subsidence from a pronounced Taklimakan dust aerosol layer aloft. The sea salt in both the submicron and supermicron modes was highly depleted in chloride from reaction with sulfuric and nitric acid vapors. The passage of a large low-pressure center, surrounded by a widespread distribution of airborne dust, on 10 April brought elevated concentrations of submicron and supermicron Gobi desert dust to the ship. The supermicron dust particles contained high concentrations of sulfate, nitrate, organic, and elemental carbon. The MBL aerosol properties and controlling processes described here provide data to evaluate and refine chemical transport models.
Received 22 August 2003; accepted 25 November 2003; published 1 September 2004.
Citation: (2004), Marine boundary layer dust and pollutant transport associated with the passage of a frontal system over eastern Asia, J. Geophys. Res., 109, D19S19, doi:10.1029/2003JD004094.
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