Aerosol profiles and surface albedo retrievals from multi-band, near-IR, spatially-resolved spectra of Titan

Details Aerosol profiles and surface albedo retrievals from multi-band, near-IR, spatially-resolved spectra of Titan Aerosol profiles and surface albedo retrievals from multi-band, near-IR, spatially-resolved spectra of Titan

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.p43b..06a&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #P43B-06

Physics

0300 Atmospheric Composition And Structure, 6213 Dust, 6281 Titan

Scientific paper

Retrieving the vertical profile of aerosol number density on Titan with near-IR spectra has historically involved the complete removal, or `rain-out', of tropospheric aerosol. Although spectra were well fit with this assumption about the microphysics and meteorology, recent results from the Huygens probe have revealed that there is significant aerosol opacity below the tropopause, refuting the `rain-out' assumption. While retrievals of aerosol profiles using ground-based spectroscopy can readily fit spectra with aerosol profiles that extend to the surface, there are a number of degenerate parameter combinations when reproducing an observed spectrum. Fitting multiple IR bands with the same parameter set constrains the number of possible parameter combinations. We present results from an updated plane-parallel, two-stream model, of Titan's atmosphere spanning 1-5 μm, fitting observations multiple bands using observations including Keck/NIRC2, VLT/SINFONI, and comparing our results to the Huygen's probe retrievals of aerosol number density.

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