An examination of global variations of sunset NO2 as measured by SAGE II

Details An examination of global variations of sunset NO2 as measured by SAGE II An examination of global variations of sunset NO2 as measured by SAGE II

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994adspr..14..219c&link_type=abstract

Advances in Space Research, Volume 14, Issue 1, p. 219-222.

Physics

Scientific paper

Global variations of sunset NO2 are examined for the period October 24, 1984 through May 28, 1991 using SAGE II data. Between 60°S and 60°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 NOy and variations in atmospheric temperature and advective transport both contribute to the observed NO2 variations.

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