In Situ Measurements of Micro-Scale Surface Roughness of Sea Ice
Surface roughness at the centimetre and millimetre scale is an important factor governing radar backscatter, especially in the case of warm (>-5 degrees C) or highly saline sea ice types. Quantitative measurements of surface roughness are required as input to backscatter models. Several field tec...
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/64634 2023-05-15T14:19:12+02:00 In Situ Measurements of Micro-Scale Surface Roughness of Sea Ice Paterson, J.S. Brisco, B. Argus, S. Jones, G. 1991-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64634 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64634/48548 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64634 ARCTIC; Vol. 44 No. 5 (1991): Supplement: 1–171; 140-146 1923-1245 0004-0843 Mathematical models Radar Sea ice Surface properties SAR Labrador Sea info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1991 ftunivcalgaryojs 2022-03-22T21:21:48Z Surface roughness at the centimetre and millimetre scale is an important factor governing radar backscatter, especially in the case of warm (>-5 degrees C) or highly saline sea ice types. Quantitative measurements of surface roughness are required as input to backscatter models. Several field techniques have been used to quantitatively measure the surface roughness of sea ice. These techniques usually posses at least one of the following obstacles: difficult field operation, expense, poor accuracies or arduous data processing. A prototype portable field instrument called the Surface Roughness Meter has been designed to measure micro-scale surface roughness. The instrument provides measurements of two surface roughness parameters, root mean square height and correlation length. The instrument consists of a 35 mm camera and a flash mounted on a platform. The system illuminates and photographs a rectangle of known size on the surface from a fixed height. The negatives are digitized and the root mean square height and correlation length are calculated and recorded using a PC-based image analysis system in the laboratory. The first sea ice application for the instrument was the Labrador Ice Margin Experiment (LIMEX) 1989. The instrument was used to measure surface roughness of first-year deformed pack ice. The resulting data from LIMEX '89 were digitized and surface roughness statistics were computed using a PC image analysis system. LIMEX '89 Surface Roughness Meter data compared favourably to roughness statistics obtained from LIMEX '87.Key words: surface roughness, radar backscatter, sea ice, Surface Roughness Meter, root mean square height, correlation length, LIMEX ’89 Mots clés: rugosité de la surface, rétrodiffusion radar, glace de mer, profilographe, hauteur quadratique moyenne, longueur de corrélation, LIMEX ’89 Article in Journal/Newspaper Arctic Labrador Sea Sea ice University of Calgary Journal Hosting ARCTIC 44 5 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Mathematical models Radar Sea ice Surface properties SAR Labrador Sea |
spellingShingle |
Mathematical models Radar Sea ice Surface properties SAR Labrador Sea Paterson, J.S. Brisco, B. Argus, S. Jones, G. In Situ Measurements of Micro-Scale Surface Roughness of Sea Ice |
topic_facet |
Mathematical models Radar Sea ice Surface properties SAR Labrador Sea |
description |
Surface roughness at the centimetre and millimetre scale is an important factor governing radar backscatter, especially in the case of warm (>-5 degrees C) or highly saline sea ice types. Quantitative measurements of surface roughness are required as input to backscatter models. Several field techniques have been used to quantitatively measure the surface roughness of sea ice. These techniques usually posses at least one of the following obstacles: difficult field operation, expense, poor accuracies or arduous data processing. A prototype portable field instrument called the Surface Roughness Meter has been designed to measure micro-scale surface roughness. The instrument provides measurements of two surface roughness parameters, root mean square height and correlation length. The instrument consists of a 35 mm camera and a flash mounted on a platform. The system illuminates and photographs a rectangle of known size on the surface from a fixed height. The negatives are digitized and the root mean square height and correlation length are calculated and recorded using a PC-based image analysis system in the laboratory. The first sea ice application for the instrument was the Labrador Ice Margin Experiment (LIMEX) 1989. The instrument was used to measure surface roughness of first-year deformed pack ice. The resulting data from LIMEX '89 were digitized and surface roughness statistics were computed using a PC image analysis system. LIMEX '89 Surface Roughness Meter data compared favourably to roughness statistics obtained from LIMEX '87.Key words: surface roughness, radar backscatter, sea ice, Surface Roughness Meter, root mean square height, correlation length, LIMEX ’89 Mots clés: rugosité de la surface, rétrodiffusion radar, glace de mer, profilographe, hauteur quadratique moyenne, longueur de corrélation, LIMEX ’89 |
format |
Article in Journal/Newspaper |
author |
Paterson, J.S. Brisco, B. Argus, S. Jones, G. |
author_facet |
Paterson, J.S. Brisco, B. Argus, S. Jones, G. |
author_sort |
Paterson, J.S. |
title |
In Situ Measurements of Micro-Scale Surface Roughness of Sea Ice |
title_short |
In Situ Measurements of Micro-Scale Surface Roughness of Sea Ice |
title_full |
In Situ Measurements of Micro-Scale Surface Roughness of Sea Ice |
title_fullStr |
In Situ Measurements of Micro-Scale Surface Roughness of Sea Ice |
title_full_unstemmed |
In Situ Measurements of Micro-Scale Surface Roughness of Sea Ice |
title_sort |
in situ measurements of micro-scale surface roughness of sea ice |
publisher |
The Arctic Institute of North America |
publishDate |
1991 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64634 |
genre |
Arctic Labrador Sea Sea ice |
genre_facet |
Arctic Labrador Sea Sea ice |
op_source |
ARCTIC; Vol. 44 No. 5 (1991): Supplement: 1–171; 140-146 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64634/48548 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64634 |
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