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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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