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Variations Fraunhofer filling in for the visible region of day-sky spectra

Jadhav, DB and Tillu, AD (1985) Variations Fraunhofer filling in for the visible region of day-sky spectra. Canadian Journal of Physics, 63. pp. 1343-1352.

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Observations of Fraunhofer filling-in (FFI) reported by various observers are critically reviewed in light of sky spectra obtained by us using grating monochromators of different resolutions under different sky conditions. A new parameter, colour gradient, was defined and measured simultaneously with Fraunhofer depths. A negative correlation for the red region and a positive correlation for the violet region were usually noticed between FFI and colour gradients. A maximum value of 30% was noticed for FFI. The above analysis and interpretation in light of existing theories indicate that about 90% of FFI is due to aerosol fluorescence and only about 10% is possibly due to rotational Raman scattering.

Item Type: Article
Additional Information: Copyright of this article belongs to Canadian Journal of Physics
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 21 Jan 2016 10:34
Last Modified: 21 Jan 2016 10:34

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