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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
Ansvarig organisation
2007 (Engelska)Ingår i: Optical Society of America. Journal A: Optics, Image Science, and Vision, ISSN 1084-7529, E-ISSN 1520-8532, Vol. 24Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
2007. Vol. 24
Nyckelord [en]
summer Optics
Forskningsämne
SWEDARCTIC 2005, Beringia 2005
Identifikatorer
URN: urn:nbn:se:polar:diva-1903DOI: 10.1364/josaa.24.000132OAI: oai:DiVA.org:polar-1903DiVA, id: diva2:810429
Anmärkning

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

Tillgänglig från: 2015-05-07 Skapad: 2015-05-06 Senast uppdaterad: 2017-12-04Bibliografiskt granskad

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Förlagets fulltexthttp://<Go to ISI>://WOS:000243036300015
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Optical Society of America. Journal A: Optics, Image Science, and Vision

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