Rapid non-LTE analysis of CO2 limb emission from the upper mesosphere to obtain kinetic temperature and pressure

Larry L. Gordley; B. T. Marshall; Steven B. Jacobson; Martin G. Mlynczak; James M. Russell III

doi:10.1117/12.514390

16 February 2004 Rapid non-LTE analysis of CO₂ limb emission from the upper mesosphere to obtain kinetic temperature and pressure

Larry L. Gordley, B. T. Marshall, Steven B. Jacobson, Martin G. Mlynczak, James M. Russell III

Author Affiliations +

Proceedings Volume 5235, Remote Sensing of Clouds and the Atmosphere VIII; (2004) https://doi.org/10.1117/12.514390
Event: Remote Sensing, 2003, Barcelona, Spain

Abstract

The SABER instrument aboard the TIMED satellite is providing highly resolved and precise broadband limb emission measurements. Inverting these measurements to temperature profiles that extend into the lower thermosphere (90+ kilometers) is a complicated and often unstable process. Non-Local Thermodynamic Equilibrium models must be employed to model the upper atmosphere physics that thwarts the normal limb measurement advantages available to lower atmosphere retrievals. Maintaining hydrostatic pressure constraints while accurately modeling the effects of upwelling radiation can induce instabilities in attempts at iterative relaxation. We show that the limb geometry can be used to apply boundary conditions during “bottom-up” procedures that stabilize the process and allow rapid convergence by minimizing the required calculations of upwelling flux.

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Larry L. Gordley, B. T. Marshall, Steven B. Jacobson, Martin G. Mlynczak, and James M. Russell III "Rapid non-LTE analysis of CO₂ limb emission from the upper mesosphere to obtain kinetic temperature and pressure", Proc. SPIE 5235, Remote Sensing of Clouds and the Atmosphere VIII, (16 February 2004); https://doi.org/10.1117/12.514390

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