Simultaneous Retrieval of Kinetic Temperature and CO2 Volume Mixing Ratio in the Mesosphere and Lower Thermosphere From Measurements of 15um and 4.3um Earth Limb Emission Under Non-LTE Conditions

Details Simultaneous Retrieval of Kinetic Temperature and CO2 Volume Mixing Ratio in the Mesosphere and Lower Thermosphere From Measurements of 15um and 4.3um Earth Limb Emission Under Non-LTE Conditions Simultaneous Retrieval of Kinetic Temperature and CO2 Volume Mixing Ratio in the Mesosphere and Lower Thermosphere From Measurements of 15um and 4.3um Earth Limb Emission Under Non-LTE Conditions

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa51a..05m&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SA51A-05

Physics

3359 Radiative Processes, 3360 Remote Sensing, 0340 Middle Atmosphere: Composition And Chemistry, 0350 Pressure, Density, And Temperature, 0360 Transmission And Scattering Of Radiation

Scientific paper

The SABER instrument on TIMED will measure CO2 15um limb emission to approximately 120 km in altitude for the purpose of determining kinetic temperature (Tk). Because CO2 volume mixing ratio (vmr) departs from its well-mixed value in the mesosphere and lower thermosphere (MLT), CO2 vmr must be retrieved simultaneously with Tk. SABER will measure CO2 4.3um limb emission to 130 km at night and to altitudes over 160 km during the day. SABER measurements of 15um and 4.3um limb emission will be combined to retrieve Tk and CO2 vmr in the MLT region. New radiation transfer techniques and retrieval methods are required to simultaneously retrieve Tk/CO2 accurately and efficiently in the MLT region under non-LTE conditions. The purpose of this paper is to present the coupled non-LTE Tk/CO2 retrieval algorithm and show some preliminary retrieved profiles.

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