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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 109,
D23S26,
17 PP., 2004
doi:10.1029/2003JD004198
Particle characteristics following cloud-modified transport from Asia to North America
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Department of Engineering, University of Denver, Denver, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado, USA
NOAA Aeronomy Laboratory, Boulder, Colorado, USA
School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
Department of Engineering, University of Denver, Denver, Colorado, USA
Fast response measurements of particle size distributions, bulk submicron particle composition, and single particle composition were made aboard the NOAA WP-3D research aircraft in the free troposphere over the eastern Pacific Ocean and the western coast of North America. Measurements of gas-phase compounds and meteorological analysis show evidence of long-range transport of layers of aerosol particles from anthropogenic and biomass-burning sources in eastern Asia. Layers of crustal particles with no evident sources were also encountered. Measurements of substantially enhanced particulate sulfate mass and gas-phase H2SO4 encountered during one transport event were interpreted with the aid of a numerical model of particle formation and growth and trajectory analysis. The observed particle size distributions and sulfate mass concentration were consistent with the simulation, indicating that the particles were formed over the mid-Pacific from gas-to-particle conversion following long-range transport of SO2 through a midlatitude cyclonic system. Such cloud systems appear to effectively scavenge most pre-existing particle mass, but can allow transport of gas-phase precursors which substantially alter downstream particle microphysical and chemical properties.
Received 1 October 2003; accepted 14 January 2004; published 9 July 2004.
Citation: (2004), Particle characteristics following cloud-modified transport from Asia to North America, J. Geophys. Res., 109, D23S26, doi:10.1029/2003JD004198.
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