Auroral vibrational population of the O2(b 1Sigma+/g/, v-prime) levels

Details Auroral vibrational population of the O2(b 1Sigma+/g/, v-prime) levels Auroral vibrational population of the O2(b 1Sigma+/g/, v-prime) levels

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38..835h&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 38, July 1990, p. 835-840.

Computer Science

11

Auroral Spectroscopy, Oxygen Spectra, Population Inversion, Spectrophotometry, Vibrational Spectra, Nitrogen Ions, Oxygen Ions, Solar Cycles, Spitsbergen (Norway), Temporal Distribution

Scientific paper

Extensive spectroscopic measurements of the near infrared auroral emission between 7600 and 8600 A were made, comprising N21P and N2(+)M bands, some atomic lines of OI multiplets, and the Delta v = 0 sequence of the O2atm bands. The observations confirm the occurrence of anomalously high intensity of the O2atm(1,1) band, but the relative increase in the (1,1) band intensity is accompanied by only a slight elevation in its rotational temperature. An even stronger decrease in the N21P bands with an even more elevated temperature of the N21P band are associated with the decrease in the absolute intensity of the O2atm (1,1) band. These observations cannot be satisfactorily explained by invoking the mechanism of Gattinger and Vallance Jones (1976). An alternative chemical scheme involving the reaction of O2+ with NO to populate O2(b 1Sigma+/g/, v-prime), vibrational relaxation of O2(b 1Sigma+/g/, v-prime greater than 1), and the quenching of O2(b 1Sigma+/g/, v-prime = 2) by O(3P) may represent the correct mechanism.

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