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Polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance
Responsible organisation
2007 (English)In: Optical Society of America. Journal A: Optics, Image Science, and Vision, ISSN 1084-7529, E-ISSN 1520-8532, Vol. 24Article in journal (Refereed) Published
Abstract [en]

The foggy sky above a white ice-cover and a dark water surface (permanent polynya or temporary lead) is white and dark gray, phenomena called the "ice-sky" and the "water-sky," respectively. Captains of icebreaker ships used to search for not-directly-visible open waters remotely on the basis of the water sky. Animals depending on open waters in the Arctic region may also detect not-directly-visible waters from a distance by means of the water sky. Since the polarization of ice-skies and water-skies has not, to our knowledge, been studied before, we measured the polarization patterns of water-skies above polynyas in the arctic ice-cover during the Beringia 2005 Swedish polar research expedition to the North Pole region. We show that there are statistically significant differences in the angle of polarization between the water-sky and the ice-sky. This polarization phenomenon could help biological and man-made sensors to detect open waters not directly visible from a distance. However, the threshold of polarization-based detection would be rather low, because the degree of linear polarization of light radiated by water-skies and ice-skies is not higher than 10%. (c) 2006 Optical Society of America.

Place, publisher, year, edition, pages
2007. Vol. 24
Keyword [en]
summer Optics
Research subject
SWEDARCTIC 2005, Beringia 2005
Identifiers
URN: urn:nbn:se:polar:diva-1903DOI: 10.1364/josaa.24.000132OAI: oai:DiVA.org:polar-1903DiVA: diva2:810429
Note

ISI Document Delivery No.: 119TM Times Cited: 3 Cited Reference Count: 12 Hegedus, Ramon Akesson, Susanne Horvath, Gabor 3 Optical soc amer Washington Optics

Available from: 2015-05-07 Created: 2015-05-06 Last updated: 2015-06-08Bibliographically approved

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Optical Society of America. Journal A: Optics, Image Science, and Vision

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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Language
  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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