Polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance
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...
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Optical Society of America
2007
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Online Access: | https://lup.lub.lu.se/record/167236 |
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ftulundlup:oai:lup.lub.lu.se:498ce00f-f82e-4257-9528-c37e23713843 2023-05-15T14:52:29+02:00 Polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance Hegedus, R Åkesson, Susanne Horvath, G 2007 https://lup.lub.lu.se/record/167236 eng eng Optical Society of America https://lup.lub.lu.se/record/167236 wos:000243036300015 scopus:33846571935 Journal of the Optical Society of America A; 24(1), pp 132-138 (2007) ISSN: 1084-7529 Biological Sciences contributiontojournal/article info:eu-repo/semantics/article text 2007 ftulundlup 2023-02-01T23:27:24Z 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. Article in Journal/Newspaper Arctic North Pole Beringia Lund University Publications (LUP) Arctic North Pole |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Biological Sciences |
spellingShingle |
Biological Sciences Hegedus, R Åkesson, Susanne Horvath, G Polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance |
topic_facet |
Biological Sciences |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Hegedus, R Åkesson, Susanne Horvath, G |
author_facet |
Hegedus, R Åkesson, Susanne Horvath, G |
author_sort |
Hegedus, R |
title |
Polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance |
title_short |
Polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance |
title_full |
Polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance |
title_fullStr |
Polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance |
title_full_unstemmed |
Polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance |
title_sort |
polarization of "water-skies" above arctic open waters: how polynyas in the ice-cover can be visually detected from a distance |
publisher |
Optical Society of America |
publishDate |
2007 |
url |
https://lup.lub.lu.se/record/167236 |
geographic |
Arctic North Pole |
geographic_facet |
Arctic North Pole |
genre |
Arctic North Pole Beringia |
genre_facet |
Arctic North Pole Beringia |
op_source |
Journal of the Optical Society of America A; 24(1), pp 132-138 (2007) ISSN: 1084-7529 |
op_relation |
https://lup.lub.lu.se/record/167236 wos:000243036300015 scopus:33846571935 |
_version_ |
1766323724614631424 |