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Western Pacific Tropospheric Ozone and Potential Vorticity: Implications for Asian PollutionTropospheric ozone (03) cross sections measured with lidar from a DC-8 aircraft over the western Pacific correspond closely with potential vorticity (PV). Both are transported from the middle latitude stratosphere, although this is not the only source of 03, and both have sinks in the tropical boundary layer. 03 and PV are good indicators of photochemical and transport process interactions. In summer, some Asian pollution, raised by convection to the upper troposphere, passes southward into the tropics and to the Southern Hemisphere. In winter, subsidence keeps the pollution at low altitudes where it moves over the ocean towards the Inter-Tropical Convergence Zone (ITCZ), with photochemical destruction and secondary pollutant generation occurring en route. Convection raises this modified air to the upper troposphere, where some re may enter the stratosphere. Thus winter Asian pollution may at have a smaller direct influence on the global atmosphere than it would if injected at other longitudes and seasons.
Document ID
19990042313
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Browell, Edward V.
(NASA Langley Research Center Hampton, VA United States)
Newell, Reginald E.
(Massachusetts Inst. of Tech. Cambridge, MA United States)
Davis, Douglas D.
(Georgia Inst. of Tech. Atlanta, GA United States)
Liu, Shaw C.
(Georgia Inst. of Tech. Atlanta, GA United States)
Date Acquired
August 19, 2013
Publication Date
November 15, 1997
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 24
Issue: 22
ISSN: 0094-8534
Subject Category
Environment Pollution
Report/Patent Number
Paper-97GL02799
Distribution Limits
Public
Copyright
Other

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