Physics
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28..519a&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 3, p. 519-522
Physics
11
Atmospheric Composition And Structure, Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Instruments And Techniques, Global Change: Remote Sensing
Scientific paper
Skylight reflectivity and polarization spectra across the ultraviolet (UV) and visible (VIS) wavelength range show abundant features coinciding with solar Fraunhofer lines. Although the appearance of these features in reflectivity spectra has been shown to be caused by rotational Raman scattering by atmospheric molecules, quantitative modelling of this so-called Ring effect as observed in polarization spectra of scattered sunlight is still lacking. Accurate modelling of UV-VIS radiances and polarization at high-spectral resolution has, however, become increasingly important because of the increased use of high-spectral resolution spectrophotometers, that are often highly polarization sensitive. In this paper, we present high-spectral resolution skylight polarization spectra and show that the Ring effect in these spectra can be simulated using a radiative transfer program that includes rotational Raman scattering up to the second order of scattering.
Aben Ilse
Helderman F.
Stam Daphne M.
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