Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..667m&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 13, July 1986, p. 667-670.
Astronomy and Astrophysics
Astronomy
21
Atmospheric Composition, Nitric Oxide, Solar Protons, Spectral Bands, Albedo, Backscattering, Molecular Spectroscopy, Nimbus 7 Satellite, Solar Instruments, Ultraviolet Astronomy
Scientific paper
Following the solar proton event (SPE) of July 13, 1982, an increase in the strength of nitric oxide Gamma bands was observed in spectral scans of the atmospheric albedo made by the solar backscattered ultraviolet instrument on Nimbus 7. Analysis of the (10), (01), and (02) Gamma band strengths allow an estimate to be made of the cumulative amount of nitric oxide above an altitude of 50 km. An increase in nitric oxide in southern hemisphere high latitudes following the SPE amounting to about 5 x 10 to the 14th molecules per sq cm above an altitude of approximately 50 km is observed. The observed increase persists until the middle of September. A similar increase is not observed in the northern hemisphere, indicating that under summer conditions the mesospheric/thermospheric NO distribution returns to normal within a few days after the end of an SPE.
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