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An examination of global variations of sunset NO2 as measured by SAGE IIGlobal variations of sunset NO2 are examined for the period October 24, 1984 through May 28, 1991 using Stratospheric Aerosol and Gas Experiment (SAGE) II data. Between 60 deg S and 60 deg N declining trends are observed at all latitudes and at all altitudes above 25 km. For the column NO2 above 25 km, the area-weighted integrated trend between these latitudes is -2.5%/year. The largest rates of decline (5%/year) are at mid to high latitudes in each hemisphere. Different temporal behavior is observed with latitude and in the two hemispheres. The largest percentage changes of NO2 from year to year are observed near 40 km at high latitudes and can be as large as 160%. These results and previously reported simulations suggest that a modulating polar source of NO(y) and variations in atmospheric temperature and advective transport both contribute to the observed NO2 variations.
Document ID
19950033798
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Callis, L. B.
(NASA Langley Research Center Hampton, VA, US, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Advances in Space Research
Volume: 14
Issue: 1
ISSN: 0273-1177
Subject Category
Geophysics
Accession Number
95A65397
Distribution Limits
Public
Copyright
Other

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