Computer Science
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008epsc.conf..685v&link_type=abstract
European Planetary Science Congress 2008, Proceedings of the conference held 21-25 September, 2008 in Münster, Germany. Online a
Computer Science
Scientific paper
Aerosols in Titan's atmosphere play an important role in the radiative budget through the absorption of the UV and visible solar flux (heating of the stratosphere) and through their infrared emission (cooling of the atmosphere). Then spatial distribution of haze, mainly governed by dynamics, has an impact on the temperature field and the radiative forcing, which in turn, affects the dynamics. We present here a study of the vertical extinction profiles of the haze in Titan's stratosphere at several latitudes in the mid-infrared spectral region. We have analyzed spectra acquired by the Composite InfraRed Spectrometer (CIRS) aboard Cassini in the range 600- 1500 cm-1 (16.7 to 6.7 microns). The thermal emission of haze in this spectral range is poorly known and was only studied from Voyager data by [1] who focused on four wavenumbers (650, 900, 1000 and 1100 cm-1). They found that the spectral dependence of haze opacity was similar for all the latitudes they studied (from 53°S to 70°N). We determine here the vertical profiles of the haze extinction for about 15 wavenumbers at several latitudes in the northern and southern hemispheres, which allows us to constrain the spectral variation of the opacity of haze.
Bezard Bruno
de Kok Remco
Vinatier Stéphane
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