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Airborne lidar observations of long-range transport in the free troposphereAirborne lidar measurements of ozone and aerosols in the lower troposphere show the presence of pollutant layers above the mixed layer. Two case studies are analyzed to identify probable source regions and mechanisms for material injection into the free troposphere above local mixed layers. An elevated haze/oxidant layer observed over South Carolina on Aug. 2, 1980, was found to originate in cumulus convection over Georgia on Aug. 1, 1980. An extensive haze/oxidant layer observed over southeastern Virginia on July 31, 1981, is shown to have been in contact with the New England mixed layer on July 30, 1981. This transported air mass is estimated to contribute approximately 30 percent of the ozone maximum measured at the surface in the Norfolk, VA, area on July 31, 1981. Such elevated 'reservoir' layers are transported over long ranges and are not detected by sensors which are confined to the surface.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Shipley, S. T. (NASA Langley Research Center Hampton, VA, United States)
Browell, E. V. (NASA Langley Research Center Hampton, VA, United States)
Mcdougal, D. S. (NASA Langley Research Center Atmospheric Sciences Div., Hampton, VA, United States)
Orndorff, B. L. (Old Dominion University Norfolk, VA, United States)
Haagenson, P. (National Center for Atmospheric Research Boulder, CO, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1984
Publication Information
Publication: Environmental Science and Technology
Volume: 18
ISSN: 0013-936X
Subject Category
Distribution Limits