Self-consistent Non-LTE Model of Infrared Molecular Emissions and Oxygen Dayglows in the Mesosphere and Lower Thermosphere
Abstract
We describe the new version of the ALI-ARMS (for Accelerated Lambda Iterations for Atmospheric Radiation and Molecular Spectra) model. The model allows simultaneous, self-consistent calculations of the non-LTE populations of the electronic- vibrational levels of ozone and O2 photolysis products and the vibrational level populations of CO2, N2, O2, O3, H2O, CO, and other molecules with a detailed accounting of electronic-vibrational, vibrational-vibrational and vibrational-translational energy exchange processes. The model is used as the reference for modeling O2 dayglow experiments and for the infrared molecular emissions measured by the multi-channel observations of MLT in the SABER experiment on TIMED. It also permits the re-evaluation of the thermalization efficiency of absorbed solar ultraviolet energy and infrared radiative cooling/heating of MLT through a detailed accounting of the electronic-vibrational relaxation of excited photolysis products via a complex chain of collisional energy conversion processes down to the vibrational energy of optically active trace gas molecules.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2007
- Bibcode:
- 2007AGUFMSA41A0293K
- Keywords:
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- 0340 Middle atmosphere: composition and chemistry;
- 0342 Middle atmosphere: energy deposition (3334);
- 0360 Radiation: transmission and scattering;
- 3359 Radiative processes