Environmental snapshots from ACE-Asia

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Read Full Article (file size: 1041295 bytes) Cited by JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 109, D19S14, doi:10.1029/2003JD004339, 2004 Environmental snapshots from ACE-Asia Ralph Kahn Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA Jim Anderson Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, Arizona, USA Theodore L. Anderson Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA Tim Bates NOAA Pacific Marine Environmental Laboratory, Seattle, Washington, USA Fred Brechtel Brechtel Manufacturing, Inc., Hayward, California, USA Christian M. Carrico Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado, USA Antony Clarke Department of Oceanography, University of Hawaii, Honolulu, Hawaii, USA Sarah J. Doherty Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA Ellsworth Dutton NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA Richard Flagan Department of Chemical Engineering, California Institute of Technology, Pasadena, California, USA Robert Frouin Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA Hajime Fukushima School of High-Technology for Human Welfare, Tokai University, Nishino, Numazu, Japan Brent Holben NASA Goddard Space Flight Center, Greenbelt, Maryland, USA Steve Howell Department of Oceanography, University of Hawaii, Honolulu, Hawaii, USA Barry Huebert Department of Oceanography, University of Hawaii, Honolulu, Hawaii, USA Anne Jefferson NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA Haflidi Jonsson Center for Interdisciplinary Remotely-Piloted Aircraft Studies, Naval Postgraduate School, Marina, California, USA Olga Kalashnikova Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA Jiyoung Kim Meteorological Research Institute, Korea Meteorological Administration, Seoul, South Korea Sang-Woo Kim School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea Pinar Kus Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA Wen-Hao Li Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA John M. Livingston SRI International, Menlo Park, California, USA Cameron McNaughton Department of Oceanography, University of Hawaii, Honolulu, Hawaii, USA John Merrill Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island, USA Sonoyo Mukai Faculty of Science and Technology, Kinki University, Higashi-Osaka, Japan Toshiyuki Murayama Faculty of Marine Engineering, Tokyo University of Marine Science and Technology, Tokyo, Japan Teruyuki Nakajima Center for Climate System Research, University of Tokyo, Tokyo, Japan Patricia Quinn NOAA Pacific Marine Environmental Laboratory, Seattle, Washington, USA Jens Redemann Bay Area Environmental Research Institute, Sonoma, California, USA Mark Rood Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA Phil Russell NASA Ames Research Center, Moffett Field, California, USA Itaru Sano Faculty of Science and Technology, Kinki University, Higashi-Osaka, Japan Beat Schmid Bay Area Environmental Research Institute, Sonoma, California, USA John Seinfeld Department of Chemical Engineering, California Institute of Technology, Pasadena, California, USA Nobuo Sugimoto Atmospheric Environment Division, National Institute for Environmental Studies, Tsukuba, Japan Jian Wang Atmospheric Science Division, Brookhaven National Laboratory, Upton, New York, USA Ellsworth J. Welton NASA Goddard Space Flight Center, Greenbelt, Maryland, USA Jae-Gwang Won School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea Soon-Chang Yoon School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea Abstract On five occasions spanning the Asian Pacific Regional Aerosol Characterization Experiment (ACE-Asia) field campaign in spring 2001, the Multiangle Imaging Spectroradiometer spaceborne instrument took data coincident with high-quality observations by instruments on two or more surface and airborne platforms. The cases capture a range of clean, polluted, and dusty aerosol conditions. With a three-stage optical modeling process, we synthesize the data from over 40 field instruments into layer-by-layer environmental snapshots that summarize what we know about the atmospheric and surface states at key locations during each event. We compare related measurements and discuss the implications of apparent discrepancies, at a level of detail appropriate for satellite retrieval algorithm and aerosol transport model validation. Aerosols within a few kilometers of the surface were composed primarily of pollution and Asian dust mixtures, as expected. Medium- and coarse-mode particle size distributions varied little among the events studied; however, column aerosol optical depth changed by more than a factor of 4, and the near-surface proportion of dust ranged between 25% and 50%. The amount of absorbing material in the submicron fraction was highest when near-surface winds crossed Beijing and the Korean Peninsula and was considerably lower for all other cases. Having simultaneous single-scattering albedo measurements at more than one wavelength would significantly reduce the remaining optical model uncertainties. The consistency of component particle microphysical properties among the five events, even in this relatively complex aerosol environment, suggests that global, satellite-derived maps of aerosol optical depth and aerosol mixture (air-mass-type) extent, combined with targeted in situ component microphysical property measurements, can provide a detailed global picture of aerosol behavior. Received 8 November 2003; accepted 12 April 2004; published 5 October 2004. Keywords: aerosols; environmental snapshots; dust; pollution; atmospheric closure. Index Terms: 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801); 0345 Atmospheric Composition and Structure: Pollution—urban and regional (0305); 0368 Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry; 0394 Atmospheric Composition and Structure: Instruments and techniques; 1610 Global Change: Atmosphere (0315, 0325). Read Full Article (file size: 1041295 bytes) Cited by Citation: Kahn, R., et al. (2004), Environmental snapshots from ACE-Asia, J. Geophys. Res., 109, D19S14, doi:10.1029/2003JD004339. Copyright 2004 by the American Geophysical Union.

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