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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 15 — May. 20, 2004
  • pp: 3133–3139

Analysis of direct solar ultraviolet irradiance measurements in the French Alps. Retrieval of turbidity and ozone column amount

Jacqueline Lenoble, Alain de la Casinière, and Thierry Cabot  »View Author Affiliations


Applied Optics, Vol. 43, Issue 15, pp. 3133-3139 (2004)
http://dx.doi.org/10.1364/AO.43.003133


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Abstract

Direct ultraviolet spectral solar irradiance is regularly obtained by the difference between global and diffuse irradiances at the French Alpine station of Briançon; the data of years 2001 and 2002 are analyzed in this paper. Comparison with modeled values is used for cloud screening, and an average UV-A aerosol optical depth is used as an index of turbidity; it is found to be around 0.05 for the clear winter days and around 0.2 in summer. Langley plots are used to verify the instrument calibration; they confirm the expected uncertainty smaller than 5%. The ozone total column amount is estimated with an uncertainty between -3 and +5 Dobson units; comparisons with TOMS (Total Ozone Mapping Spectrometer) overpass values shows agreement within the expected uncertainties of both instruments.

© 2004 Optical Society of America

OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(010.1320) Atmospheric and oceanic optics : Atmospheric transmittance

History
Original Manuscript: September 9, 2003
Revised Manuscript: January 23, 2004
Published: May 20, 2004

Citation
Jacqueline Lenoble, Alain de la Casinière, and Thierry Cabot, "Analysis of direct solar ultraviolet irradiance measurements in the French Alps. Retrieval of turbidity and ozone column amount," Appl. Opt. 43, 3133-3139 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-15-3133

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