Computer Science
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30..545n&link_type=abstract
Planetary and Space Science, vol. 30, June 1982, p. 545-557.
Computer Science
22
Airglow, Atmospheric Composition, Ozone, Abundance, Annual Variations, Atmospheric Density, Dayglow, Latitude, Mesopause, Twilight Glow
Scientific paper
Aircraft measurements of O2(1 Delta) emission made over a 10-yr period provide information on the variation of ozone with latitude and season in the altitude region 50-90 km. Between 50 and 70 km there appears to be little variation (less than + or - 25%), whereas the abundance between 80 and 90 km exhibits a large seasonal change north of 30 deg N and much less at lower latitude. At mid and high latitude the column abundance above about 80 km changes from less than or equal to 10 to the 14th/sq cm in summer to about 3 x 10 to the 14th/sq cm in winter. There are occasional enhancements in both the day and twilight airglow which almost always occur in association with auroral activity or, at least, where such activity is statistically most likely. These enhancements appear to reflect a corresponding increase in the ozone mixing ratio in the upper stratosphere. While the gradient in ozone mixing ratio with latitude is generally small at altitudes between 50 and 90 km, there are occasions when a temporary latitude structure can be seen, particularly above 80 km.
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