Evidence of non-LTE in the CO2 15 mu m weak bands from ISAMS and WINDII observations
An analysis of the measurements of the CO2 15 μm radiance emission by the UARS/ISAMS 30W channel and the kinetic temperature from UARS/WINDII taken on July 21, 1992 at northern latitudes around the mesopause is presented. The modeling of the measurements clearly show evidence of non-LTE emissions in...
| Hlavní autoři: | , , , |
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| Médium: | Journal article |
| Jazyk: | English |
| Vydáno: |
1997
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| Shrnutí: | An analysis of the measurements of the CO2 15 μm radiance emission by the UARS/ISAMS 30W channel and the kinetic temperature from UARS/WINDII taken on July 21, 1992 at northern latitudes around the mesopause is presented. The modeling of the measurements clearly show evidence of non-LTE emissions in the CO2(v2=1) levels of the minor isotopes 636, 628, and 627 in the 70-90 km region. A comparison with non-LTE model predictions by López-Puertas et al. [1992a] shows a good agreement within the errors in the measured quantities. This constitutes the first experimental evidence of non-LTE emissions in these CO2 15 μm weak bands. The measurements also represent indirect evidence of the net radiative heating produced by these bands around the summer mesopause. |
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