CO2 Non-LTE Excitation and Emission at 4.3 μm from a Line-by-Line Radiative Transfer Model

Henry Nebel; P. P. Wintersteiner; R. H. Picard; R. D. Sharma; J. R. Winick

doi:10.1364/ORSA.1993.ThE.15

Optical Remote Sensing of the Atmosphere
Technical Digest Series (Optica Publishing Group, 1993),
paper ThE.15
•https://doi.org/10.1364/ORSA.1993.ThE.15

CO₂ Non-LTE Excitation and Emission at 4.3 μm from a Line-by-Line Radiative Transfer Model

Henry Nebel, P. P. Wintersteiner, R. H. Picard, R. D. Sharma, and J. R. Winick

Optical Remote Sensing of the Atmosphere 1993

Utah United States
8–12 March 1993
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Poster Session 2 (ThE)

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H. Nebel, P. P. Wintersteiner, R. H. Picard, R. D. Sharma, and J. R. Winick, "CO2 Non-LTE Excitation and Emission at 4.3 μm from a Line-by-Line Radiative Transfer Model," in Optical Remote Sensing of the Atmosphere, Technical Digest Series (Optica Publishing Group, 1993), paper ThE.15.

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Abstract

In this report, infrared radiative excitation of the asymmetric stretch (v3 mode) vibrationally excited states of CO₂ in the non-LTE region of the quiescent atmosphere is considered using a line-by-line (LBL) radiative transfer model¹. A set of codes known collectively as Atmospheric Radiance Code (ARC) is used to calculate (1) the vibrational populations of states that emit at 4.3 μm, and (2) the resulting earthlimb radiance. The model calculations are then compared to earthlimb radiance data from the Spectral Infrared Rocket Experiment, or SPIRE². The approach has previously been used to model CO₂ 15 μm emission³.

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