The Application of Optical Filtering in Coherent Light to the Study of Aerial Photographs of Greenland Glaciers
The principles that underlie the analysis of aerial photographs using the coherent light from a laser are summarized, and then a study of such a filtering technique applied to an aerial photograph of Jakobshavn Isbræ is given as an example. Two systems of crevasses, respectively parallel and perpend...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1967
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0022143000020098 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020098 |
id |
crcambridgeupr:10.1017/s0022143000020098 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0022143000020098 2024-09-15T18:07:45+00:00 The Application of Optical Filtering in Coherent Light to the Study of Aerial Photographs of Greenland Glaciers Bauer, A. Fontanel, A. Grau, G. 1967 http://dx.doi.org/10.1017/s0022143000020098 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020098 en eng Cambridge University Press (CUP) Journal of Glaciology volume 6, issue 48, page 781-793 ISSN 0022-1430 1727-5652 journal-article 1967 crcambridgeupr https://doi.org/10.1017/s0022143000020098 2024-07-24T04:03:48Z The principles that underlie the analysis of aerial photographs using the coherent light from a laser are summarized, and then a study of such a filtering technique applied to an aerial photograph of Jakobshavn Isbræ is given as an example. Two systems of crevasses, respectively parallel and perpendicular to the direction of flow of the southern lobe of the glacier can be detected after filtering. These two crevasse systems were not apparent at first sight on the original photograph as they were obliterated by a network of curved crevasses. It appears that this latter network are not true crevasses, but surface undulations formed by differential ablation of bands of black (or blue) and white ice. Article in Journal/Newspaper glacier Greenland Jakobshavn Jakobshavn isbræ Journal of Glaciology Cambridge University Press Journal of Glaciology 6 48 781 793 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
The principles that underlie the analysis of aerial photographs using the coherent light from a laser are summarized, and then a study of such a filtering technique applied to an aerial photograph of Jakobshavn Isbræ is given as an example. Two systems of crevasses, respectively parallel and perpendicular to the direction of flow of the southern lobe of the glacier can be detected after filtering. These two crevasse systems were not apparent at first sight on the original photograph as they were obliterated by a network of curved crevasses. It appears that this latter network are not true crevasses, but surface undulations formed by differential ablation of bands of black (or blue) and white ice. |
format |
Article in Journal/Newspaper |
author |
Bauer, A. Fontanel, A. Grau, G. |
spellingShingle |
Bauer, A. Fontanel, A. Grau, G. The Application of Optical Filtering in Coherent Light to the Study of Aerial Photographs of Greenland Glaciers |
author_facet |
Bauer, A. Fontanel, A. Grau, G. |
author_sort |
Bauer, A. |
title |
The Application of Optical Filtering in Coherent Light to the Study of Aerial Photographs of Greenland Glaciers |
title_short |
The Application of Optical Filtering in Coherent Light to the Study of Aerial Photographs of Greenland Glaciers |
title_full |
The Application of Optical Filtering in Coherent Light to the Study of Aerial Photographs of Greenland Glaciers |
title_fullStr |
The Application of Optical Filtering in Coherent Light to the Study of Aerial Photographs of Greenland Glaciers |
title_full_unstemmed |
The Application of Optical Filtering in Coherent Light to the Study of Aerial Photographs of Greenland Glaciers |
title_sort |
application of optical filtering in coherent light to the study of aerial photographs of greenland glaciers |
publisher |
Cambridge University Press (CUP) |
publishDate |
1967 |
url |
http://dx.doi.org/10.1017/s0022143000020098 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020098 |
genre |
glacier Greenland Jakobshavn Jakobshavn isbræ Journal of Glaciology |
genre_facet |
glacier Greenland Jakobshavn Jakobshavn isbræ Journal of Glaciology |
op_source |
Journal of Glaciology volume 6, issue 48, page 781-793 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000020098 |
container_title |
Journal of Glaciology |
container_volume |
6 |
container_issue |
48 |
container_start_page |
781 |
op_container_end_page |
793 |
_version_ |
1810445120872382464 |