Surface morphology and backscattering of ice-ridge sails in the Baltic Sea
Abstract The triangular shape of an ice-ridge sail in the Baltic Sea was studied statistically. The dimensions and orientation of individual ice blocks were measured in several ridges. All measurements were carried out from the standpoint of backscattering research. The results confirm that given ge...
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Cambridge University Press (CUP)
1996
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Online Access: | http://dx.doi.org/10.1017/s0022143000030604 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000030604 |
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crcambridgeupr:10.1017/s0022143000030604 2024-06-23T07:54:15+00:00 Surface morphology and backscattering of ice-ridge sails in the Baltic Sea Manninen, A. T. 1996 http://dx.doi.org/10.1017/s0022143000030604 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000030604 en eng Cambridge University Press (CUP) Journal of Glaciology volume 42, issue 140, page 141-156 ISSN 0022-1430 1727-5652 journal-article 1996 crcambridgeupr https://doi.org/10.1017/s0022143000030604 2024-06-12T04:04:33Z Abstract The triangular shape of an ice-ridge sail in the Baltic Sea was studied statistically. The dimensions and orientation of individual ice blocks were measured in several ridges. All measurements were carried out from the standpoint of backscattering research. The results confirm that given geometrical properties of the two sides of ice ridges are in general not equal. A slight negative correlation was found between the slope angle and width of the sail. All three orientations and all three size parameters of ice blocks on both sides of the ridges studied can be considered as normally distributed. A log-normal distribution, however, fits slightly better the dimensions of the orientationally best rectangular approximations of the polygonal main facets of flat ice blocks. Three-dimensional modelling of ice ridges is essential, since the total side-facet area visible is typically at least as large as the total main-facet area. Calculated incidence-angle distrubutions show that the broad distributions of orientations and dimensions make different redges appear very similar on radar images. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 42 140 141 156 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The triangular shape of an ice-ridge sail in the Baltic Sea was studied statistically. The dimensions and orientation of individual ice blocks were measured in several ridges. All measurements were carried out from the standpoint of backscattering research. The results confirm that given geometrical properties of the two sides of ice ridges are in general not equal. A slight negative correlation was found between the slope angle and width of the sail. All three orientations and all three size parameters of ice blocks on both sides of the ridges studied can be considered as normally distributed. A log-normal distribution, however, fits slightly better the dimensions of the orientationally best rectangular approximations of the polygonal main facets of flat ice blocks. Three-dimensional modelling of ice ridges is essential, since the total side-facet area visible is typically at least as large as the total main-facet area. Calculated incidence-angle distrubutions show that the broad distributions of orientations and dimensions make different redges appear very similar on radar images. |
format |
Article in Journal/Newspaper |
author |
Manninen, A. T. |
spellingShingle |
Manninen, A. T. Surface morphology and backscattering of ice-ridge sails in the Baltic Sea |
author_facet |
Manninen, A. T. |
author_sort |
Manninen, A. T. |
title |
Surface morphology and backscattering of ice-ridge sails in the Baltic Sea |
title_short |
Surface morphology and backscattering of ice-ridge sails in the Baltic Sea |
title_full |
Surface morphology and backscattering of ice-ridge sails in the Baltic Sea |
title_fullStr |
Surface morphology and backscattering of ice-ridge sails in the Baltic Sea |
title_full_unstemmed |
Surface morphology and backscattering of ice-ridge sails in the Baltic Sea |
title_sort |
surface morphology and backscattering of ice-ridge sails in the baltic sea |
publisher |
Cambridge University Press (CUP) |
publishDate |
1996 |
url |
http://dx.doi.org/10.1017/s0022143000030604 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000030604 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 42, issue 140, page 141-156 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000030604 |
container_title |
Journal of Glaciology |
container_volume |
42 |
container_issue |
140 |
container_start_page |
141 |
op_container_end_page |
156 |
_version_ |
1802646337007648768 |