The O2 Herzberg I bands in the equatorial nightglow

Details The O2 Herzberg I bands in the equatorial nightglow The O2 Herzberg I bands in the equatorial nightglow

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jastp..59..295m&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, v. 59, p. 295-303.

Physics

4

Scientific paper

Simultaneous measurements of the nightglow profiles of the O2 Herzberg I bands, the O2 Atmospheric (0-0) band and the atomic oxygen green line, carried out at Alcântara (2.3°S 44.4°W), are presented and discussed. This is the first measurement of the vertical profile of the Herzberg I band to be carried out at equatorial latitudes. The atomic oxygen concentration derived from the O2 Atmospheric (0-0) band emission profile is used to test a photochemical scheme to explain the measured O2 (A3∑+u-X3∑-g) nightglow emission based on atomic oxygen recombination. The kinetic analysis is carried out assuming the emission ratio Herzberg I: Herzberg II = 5.1, 10:1 and the extreme case where Herzberg II brightness = 0. For all three cases studied, the quenching rates required to explain the measurements are higher than the values derived from previous airglow measurements.

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