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Detailed Reference Information |
Miller, S.M., Winick, J. and Snell, H.E. (2000). Non-LTE effects on retrieval of temperature from the CO2 laser bands using CIRRIS 1A data. Journal of Geophysical Research 105: doi: 10.1029/1999JD901111. issn: 0148-0227. |
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It is well known that in the upper stratosphere and lower mesosphere, the CO2 laser band (00011--10001) transitions are populated by both local thermodynamic equilibrium (LTE) and non-LTE mechanisms. Examination of infrared (IR) limb emission measurements from the Cryogenic Infrared Radiance Instrumentation for Shuttle (CIRRIS 1A) experiment clearly illustrates this effect. The presence of non-LTE emissions, if left unaccounted for, will severely degrade the retrieval of kinetic temperature profiles. We have applied a non-LTE compensation technique whereby the non-LTE component is modeled and the resulting non-LTE radiance is subtracted from the measured radiances. The kinetic temperature profile is then retrieved utilizing the modified data. As a means of validating this approach, we have compared the resulting temperature profiles to ones retrieved using the 792 cm-1 Q branch of CO2, the (11101--10002) transition, which is not significantly affected by non-LTE excitation. ¿ 2000 American Geophysical Union |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Chemical kinetic and photochemical properties, Atmospheric Composition and Structure, Pressure, density, and temperature, Atmospheric Composition and Structure, Instruments and techniques |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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