Evidence of non-LTE in the CO2 15 μm weak bands from ISAMS and WINDII observations

DOI: 
Publication date: 
01/01/1997
Main author: 
López-Puertas M.
IAA authors: 
López-Puertas, M.
Authors: 
López-Puertas M., Dudhia A., Shepherd M.G., Edwards D.P.
Journal: 
Geophysical Research Letters
Publication type: 
Article
Volume: 
24
Pages: 
361-364
Number: 
Abstract: 
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.
Database: 
SCOPUS
Keywords: