Stratospheric nitrogen dioxide observed by ground-based and balloon-borne techniques at Syowa Station (69.0 deg S, 39.6 deg E)

Details Stratospheric nitrogen dioxide observed by ground-based and balloon-borne techniques at Syowa Station (69.0 deg S, 39.6 deg E) Stratospheric nitrogen dioxide observed by ground-based and balloon-borne techniques at Syowa Station (69.0 deg S, 39.6 deg E)

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13.1268s&link_type=abstract

Geophysical Research Letters (Supplement) (ISSN 0094-8276), vol. 13, Nov. 1986, p. 1268-1271.

Computer Science

Sound

15

Atmospheric Composition, Balloon Sounding, Nitrogen Dioxide, Stratosphere, Annual Variations, Density Distribution, Ozone Depletion, Vertical Distribution

Scientific paper

Seasonal variation of vertical column density of stratospheric NO2 was determined for the period of March 1983 to January 1984 by means of ground-based visible absorption spectroscopy at Syowa Station (69.0 deg S, 39.6 deg E), Antarctica. The winter minimum of about 1 x 10 to the 15th/sq cm were observed. These values are nearly equal to, or a little bit smaller than, those observed at northern high latitudes. The nighttime decay of column density was small from autumn to early spring. A rapid increase in column density occurred at the end of September before the minimum of total ozone content in mid-October. This behavior suggests that both dynamical and photochemical processes may be involved in the Antarctic ozone depletion. The vertical profile of stratospheric NO2 in early summer in Antarctica was revealed by three balloon-borne measurements over Syowa Station in November 1982 and 1983. Above 25 km altitude, these profiles are basically identical to those observed at middle and high latitudes in the Northern Hemisphere. In the lower stratosphere below 25 km, variability in NO2 density seems to be large due to dynamical effects.

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