Behaviour of the O2 infrared atmospheric (0-0) band in the middle atmosphere during evening twilight and at night

Details Behaviour of the O2 infrared atmospheric (0-0) band in the middle atmosphere during evening twilight and at night Behaviour of the O2 infrared atmospheric (0-0) band in the middle atmosphere during evening twilight and at night

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989p%26ss...37...61l&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 37, Jan. 1989, p. 61-72. Research supported by the Comision Nacional de Inves

Computer Science

15

Infrared Spectra, Middle Atmosphere, Nightglow, Oxygen Spectra, Atmospheric Chemistry, Dayglow, Evening, Night, Photochemical Reactions, Radiative Lifetime

Scientific paper

Measurements of the 0-0 band of the Infrared Atmospheric System of the molecular oxygen during early night-time show a nonnegligible fraction of the emission which is a remnant of the very high concentration of atmospheric O2(a1Delta sub g) during the day. The importance of this contribution decreases progressively after sunset. The complexity of the photochemistry during twilight, involving fast variation in the concentration of the atmospheric compounds and in the solar fluxes, makes it difficult to study the decay of the daytime emission. A detailed treatment of the different processes governing the production and loss mechanisms of the O2(a1Delta sub g) at times near sunset and during the night has been developed. This model is capable of explaining the remnant observed in measurements carried out by rocket-borne instrumentation.

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