Marine boundary layer dust and pollutant transport associated with the passage of a frontal system over eastern Asia

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Read Full Article (file size: 1814402 bytes) Cited by JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 109, D19S19, doi:10.1029/2003JD004094, 2004 Marine boundary layer dust and pollutant transport associated with the passage of a frontal system over eastern Asia Timothy S. Bates 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 Patricia K. Quinn Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA Derek J. Coffman Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA David S. Covert 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 Theresa L. Miller Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA James E. Johnson Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington, USA Gregory R. Carmichael Center for Global and Regional Environmental Research, University of Iowa, Iowa City, Iowa, USA Itsushi Uno Research Institute for Applied Mechanics, Kyushu University, Kasuga, Japan Sergio A. Guazzotti Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, USA David A. Sodeman Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, USA Kimberly A. Prather Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, USA Monica Rivera Department of Environmental Engineering, Princeton University, Princeton, New Jersey, USA Lynn M. Russell Department of Chemical Engineering, Princeton University, Princeton, New Jersey, USA John T. Merrill Center for Atmospheric Chemistry Studies, Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island, USA Abstract 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. Keywords: aerosol chemistry; aerosol size distributions; ACE-Asia. Index Terms: 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801); 0322 Atmospheric Composition and Structure: Constituent sources and sinks; 0368 Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry. Read Full Article (file size: 1814402 bytes) Cited by Citation: Bates, T. S., et al. (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. Copyright 2004 by the American Geophysical Union.

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