Sensitivity of IR Temperature Retrievals in the Polar Summer MLT to NLTE considerations

Details Sensitivity of IR Temperature Retrievals in the Polar Summer MLT to NLTE considerations Sensitivity of IR Temperature Retrievals in the Polar Summer MLT to NLTE considerations

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsa53a..07k&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA53A-07

Other

0340 Middle Atmosphere: Composition And Chemistry, 0350 Pressure, Density, And Temperature, 0360 Radiation: Transmission And Scattering, 1640 Remote Sensing (1855)

Scientific paper

Adequate retrieval of kinetic temperature and other parameters in the summer polar mesosphere and lower thermosphere (MLT) from limb infrared radiances requires detailed accounting for the breakdown of local thermodynamic equilibrium (NLTE). A large fraction of the limb radiance is formed by resonant scattering of the upwelling radiation from the stratosphere and therefore, does not have links to the local thermal radiation sources. Moreover, in case of CO2, this scattering depends strongly on the V-V rate of the ν2 quanta exchange between isotopes. As a result, both the temperature values and the position of the retrieved mesopause depend on the rate coefficient of this process. On the other hand, the lower boundary of a noctilucent cloud (NLC) lies near the lower crossing point of the temperature profile and the frost point curve. This suggests that NLC observations may provide an important tool for validating temperature and water vapor density retrievals as well as the NLTE model describing the formation of infrared radiance in the MLT. This paper will describe these considerations including examples using the TIMED-SABER data for the polar summer mesosphere.

Affiliated with

Also associated with

No associations

Rating

Sensitivity of IR Temperature Retrievals in the Polar Summer MLT to NLTE considerations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Sensitivity of IR Temperature Retrievals in the Polar Summer MLT to NLTE considerations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensitivity of IR Temperature Retrievals in the Polar Summer MLT to NLTE considerations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1026432