The density and vibrational distribution of molecular oxygen in the lower thermosphere

Details The density and vibrational distribution of molecular oxygen in the lower thermosphere The density and vibrational distribution of molecular oxygen in the lower thermosphere

Aug 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970p%26ss...18.1255r&link_type=abstract

Planetary and Space Science, vol. 18, Issue 8, pp.1255-1265

Physics

1

Scientific paper

Observations of solar ultraviolet radiation from the satellite OSO-IV are analysed. The atmospheric absorption of 1032 Å (O VI) can be reproduced theoretically by a static diffusion model of the O 2 , density above 120 km with a density of (3.6 ± 0.4) x 10 10 cm -3 at 120 km. The atmospheric absorption of 1335 Å (CII) appears to require an effective absorption cross section of O 2 that decreases with increasing altitude. The decrease could result from an increasing vibrational development of O 2 , such that the fraction of molecules in the ground vibrational state is less than about 0.9 at 130 km, 0.7 at 150 km and 0.5 above 160 km.

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