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Environmental snapshots from ACE-Asia
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, Arizona, USA
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
NOAA Pacific Marine Environmental Laboratory, Seattle, Washington, USA
Brechtel Manufacturing, Inc., Hayward, California, USA
Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado, USA
Department of Oceanography, University of Hawaii, Honolulu, Hawaii, USA
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA
Department of Chemical Engineering, California Institute of Technology, Pasadena, California, USA
Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA
School of High-Technology for Human Welfare, Tokai University, Nishino, Numazu, Japan
NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
Department of Oceanography, University of Hawaii, Honolulu, Hawaii, USA
Department of Oceanography, University of Hawaii, Honolulu, Hawaii, USA
NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA
Center for Interdisciplinary Remotely-Piloted Aircraft Studies, Naval Postgraduate School, Marina, California, USA
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
Meteorological Research Institute, Korea Meteorological Administration, Seoul, South Korea
School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea
Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
SRI International, Menlo Park, California, USA
Department of Oceanography, University of Hawaii, Honolulu, Hawaii, USA
Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island, USA
Faculty of Science and Technology, Kinki University, Higashi-Osaka, Japan
Faculty of Marine Engineering, Tokyo University of Marine Science and Technology, Tokyo, Japan
Center for Climate System Research, University of Tokyo, Tokyo, Japan
NOAA Pacific Marine Environmental Laboratory, Seattle, Washington, USA
Bay Area Environmental Research Institute, Sonoma, California, USA
Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
NASA Ames Research Center, Moffett Field, California, USA
Faculty of Science and Technology, Kinki University, Higashi-Osaka, Japan
Bay Area Environmental Research Institute, Sonoma, California, USA
Department of Chemical Engineering, California Institute of Technology, Pasadena, California, USA
Atmospheric Environment Division, National Institute for Environmental Studies, Tsukuba, Japan
Atmospheric Science Division, Brookhaven National Laboratory, Upton, New York, USA
NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea
School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea
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.
Citation: (2004), Environmental snapshots from ACE-Asia, J. Geophys. Res., 109, D19S14, doi:10.1029/2003JD004339.
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