Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic
The knowledge on the optics of fogbows is scarce, and their polarization characteristics have never been measured to our knowledge. To fill this gap we measured the polarization features of 16 fogbows during the Beringia 2005 Arctic polar research expedition by imaging polarimetry in the red, green...
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ftunivgironadugi:oai:dugi-doc.udg.edu:10256/8504 2023-05-15T14:55:37+02:00 Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic Horváth, Gábor Hegedüs, Ramon Barta, András Farkas, Alexandra Åkesson, Susanne 2011 application/pdf http://hdl.handle.net/10256/8504 eng eng Optical Society of America info:eu-repo/semantics/altIdentifier/doi/10.1364/AO.50.000F64 info:eu-repo/semantics/altIdentifier/issn/1559-128X info:eu-repo/semantics/altIdentifier/eissn/2155-3165 http://hdl.handle.net/10256/8504 Tots els drets reservats info:eu-repo/semantics/openAccess © Applied Optics, 2011, vol. 50, núm. 28, p. F64-F71 Articles publicats (D-ATC) Polarització (Llum) Polarization (Light) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2011 ftunivgironadugi https://doi.org/10.1364/AO.50.000F64 2022-05-19T06:12:27Z The knowledge on the optics of fogbows is scarce, and their polarization characteristics have never been measured to our knowledge. To fill this gap we measured the polarization features of 16 fogbows during the Beringia 2005 Arctic polar research expedition by imaging polarimetry in the red, green and blue spectral ranges. We present here the first polarization patterns of the fogbow. In the patterns of the degree of linear polarization p, fogbows and their supernumerary bows are best visible in the red spectral range due to the least dilution of fogbow light by light scattered in air. In the patterns of the angle of polarization α fogbows are practically not discernible because their α-pattern is the same as that of the sky: the direction of polarization is perpendicular to the plane of scattering and is parallel to the arc of the bow, independently of the wavelength. Fogbows and their supernumeraries were best seen in the patterns of the polarized radiance. In these patterns the angular distance δ between the peaks of the primary and the first supernumerary and the angular width σ of the primary bow were determined along different radii from the center of the bow. δ ranged between 6.08° and 13.41° , while σ changed from 5.25° to 19.47° . Certain fogbows were relatively homogeneous, meaning small variations of δ and σ along their bows. Other fogbows were heterogeneous, possessing quite variable δ- and σ-values along their bows. This variability could be a consequence of the characteristics of the high Arctic with open waters within the ice shield resulting in the spatiotemporal change of the droplet size within the fog Article in Journal/Newspaper Arctic Beringia Universitat de Girona: DUGiDocs (UdG Digital Repository) Arctic Applied Optics 50 28 F64 |
institution |
Open Polar |
collection |
Universitat de Girona: DUGiDocs (UdG Digital Repository) |
op_collection_id |
ftunivgironadugi |
language |
English |
topic |
Polarització (Llum) Polarization (Light) |
spellingShingle |
Polarització (Llum) Polarization (Light) Horváth, Gábor Hegedüs, Ramon Barta, András Farkas, Alexandra Åkesson, Susanne Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic |
topic_facet |
Polarització (Llum) Polarization (Light) |
description |
The knowledge on the optics of fogbows is scarce, and their polarization characteristics have never been measured to our knowledge. To fill this gap we measured the polarization features of 16 fogbows during the Beringia 2005 Arctic polar research expedition by imaging polarimetry in the red, green and blue spectral ranges. We present here the first polarization patterns of the fogbow. In the patterns of the degree of linear polarization p, fogbows and their supernumerary bows are best visible in the red spectral range due to the least dilution of fogbow light by light scattered in air. In the patterns of the angle of polarization α fogbows are practically not discernible because their α-pattern is the same as that of the sky: the direction of polarization is perpendicular to the plane of scattering and is parallel to the arc of the bow, independently of the wavelength. Fogbows and their supernumeraries were best seen in the patterns of the polarized radiance. In these patterns the angular distance δ between the peaks of the primary and the first supernumerary and the angular width σ of the primary bow were determined along different radii from the center of the bow. δ ranged between 6.08° and 13.41° , while σ changed from 5.25° to 19.47° . Certain fogbows were relatively homogeneous, meaning small variations of δ and σ along their bows. Other fogbows were heterogeneous, possessing quite variable δ- and σ-values along their bows. This variability could be a consequence of the characteristics of the high Arctic with open waters within the ice shield resulting in the spatiotemporal change of the droplet size within the fog |
format |
Article in Journal/Newspaper |
author |
Horváth, Gábor Hegedüs, Ramon Barta, András Farkas, Alexandra Åkesson, Susanne |
author_facet |
Horváth, Gábor Hegedüs, Ramon Barta, András Farkas, Alexandra Åkesson, Susanne |
author_sort |
Horváth, Gábor |
title |
Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic |
title_short |
Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic |
title_full |
Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic |
title_fullStr |
Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic |
title_full_unstemmed |
Imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high Arctic |
title_sort |
imaging polarimetry of the fogbow: polarization characteristics of white rainbows measured in the high arctic |
publisher |
Optical Society of America |
publishDate |
2011 |
url |
http://hdl.handle.net/10256/8504 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beringia |
genre_facet |
Arctic Beringia |
op_source |
© Applied Optics, 2011, vol. 50, núm. 28, p. F64-F71 Articles publicats (D-ATC) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1364/AO.50.000F64 info:eu-repo/semantics/altIdentifier/issn/1559-128X info:eu-repo/semantics/altIdentifier/eissn/2155-3165 http://hdl.handle.net/10256/8504 |
op_rights |
Tots els drets reservats info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1364/AO.50.000F64 |
container_title |
Applied Optics |
container_volume |
50 |
container_issue |
28 |
container_start_page |
F64 |
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1766327650783068160 |