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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 9 — Mar. 20, 2003
  • pp: 1583–1587

Retrieval of the ultraviolet effective snow albedo during 1998 winter campaign in the French Alps

Irina Smolskaia, Dominique Masserot, Jacqueline Lenoble, Colette Brogniez, and Alain de la Casinière  »View Author Affiliations


Applied Optics, Vol. 42, Issue 9, pp. 1583-1587 (2003)
http://dx.doi.org/10.1364/AO.42.001583


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Abstract

A measurement campaign was carried out in February 1998 at Briançon Station, French Alps (44.9° N, 6.65° E, 1310 m above sea level) in order to determine the UV effective snow albedo that was retrieved for both erythemal and UV-A irradiances from measurements and modeling enhancement factors. The results are presented for 15 cloudless days with very variable snow cover and a small snowfall in the middle of the campaign. Erythemal irradiance enhancement due to the surface albedo was found to decrease from approximately +15% to +5% with a jump to +22% after the snowfall, whereas UV-A irradiance enhancement decreased from 7% to 5% and increased to 15% after the snowfall. These values fit to effective surface albedos of 0.4, 0.1, and 0.5 for erythemal, and to effective albedos of 0.25, 0.1, and 0.4 for UV-A irradiances, respectively. An unexpected difference between the effective albedos retrieved in the two wavelength regions can be explained by the difference of the environment contribution.

© 2003 Optical Society of America

OCIS Codes
(010.1310) Atmospheric and oceanic optics : Atmospheric scattering
(010.4950) Atmospheric and oceanic optics : Ozone
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

History
Original Manuscript: July 12, 2002
Revised Manuscript: November 14, 2002
Published: March 20, 2003

Citation
Irina Smolskaia, Dominique Masserot, Jacqueline Lenoble, Colette Brogniez, and Alain de la Casinière, "Retrieval of the ultraviolet effective snow albedo during 1998 winter campaign in the French Alps," Appl. Opt. 42, 1583-1587 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-9-1583

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