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Conference Paper

Remote sensing of temperature and atmospheric constituents from surface based FTIR measurements


Bakan,  Stephan
MPI for Meteorology, Max Planck Society;

Schlicht,  J.
MPI for Meteorology, Max Planck Society;

Hollweg,  H. D.
MPI for Meteorology, Max Planck Society;

Fiedler,  Lars
MPI for Meteorology, Max Planck Society;

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Bakan, S., Schlicht, J., Hollweg, H. D., & Fiedler, L. (2001). Remote sensing of temperature and atmospheric constituents from surface based FTIR measurements. In W. Smith, & Y. Timofeyev (Eds.), IRS 2000: Current problems in atmospheric radiation. Proc. of the International Radiation Symposium, St. Petersburg, Russia (pp. 1125-1128). Hampton: Deepak.

Cite as: https://hdl.handle.net/21.11116/0000-000B-7644-4
Spectra from the modern field proof FTIR radiometer system OASIS in the
near and the thermal infrared at a resolution of 1 cm(-1) are applied to
the derivation of various atmospheric properties. To ensure reliable
quantitative calibration, two high precision calibration black body
cavities at different temperatures are frequently viewed between target
measurements. The non-linear calibration of the MCT-detector in the
thermal infrared has been derived with the help of a cold black body
cavity at temperatures down to -70degreesC.
A retrieval procedure for temperature and humidity profiles, based on
standard matrix inversion techniques of the linearized radiative
transfer equation, has been implemented and successful application
examples have been collected in several instances. Examples of a time
development of profiles over 3 cloud free days during the LACE'98
campaign and of the dissolution of a strong nighttime inversion during
the morning hours show the potential use of this technique.
The study of the infrared spectra in a case of a forest fire aerosol
cloud reveals the potential to study aerosol emission signals in the
infrared windows. Considerable emission in the displayed case allows to
estimate a possible addition of a few W/m(2) to the downward longwave
radiative fluxes at the surface by atmospheric aerosols.