Rapid demise and committed loss of Bowman Glacier, northern Ellesmere Island, Arctic Canada
Abstract Using historical and recent aerial photography and structure from motion (SfM) multiview stereo (MVS) techniques, we reconstruct the 1959 and 2018 ice surface topography and determine the geodetic mass balance of Bowman Glacier, a small mountain glacier on northern Ellesmere Island. This is...
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Online Access: | http://dx.doi.org/10.1017/jog.2022.119 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022001198 |
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crcambridgeupr:10.1017/jog.2022.119 2024-03-03T08:41:42+00:00 Rapid demise and committed loss of Bowman Glacier, northern Ellesmere Island, Arctic Canada Medrzycka, Dorota Copland, Luke Noël, Brice 2023 http://dx.doi.org/10.1017/jog.2022.119 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022001198 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 69, issue 276, page 997-1010 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2022.119 2024-02-08T08:44:16Z Abstract Using historical and recent aerial photography and structure from motion (SfM) multiview stereo (MVS) techniques, we reconstruct the 1959 and 2018 ice surface topography and determine the geodetic mass balance of Bowman Glacier, a small mountain glacier on northern Ellesmere Island. This is combined with optical satellite imagery to reconstruct the evolution in extent of the glacier over six decades, and ground-penetrating radar measurements of ice thickness to estimate the remaining ice volume. Between 1959 and 2020, Bowman Glacier lost 78% of its extent (reducing from 2.75 to 0.61 km 2 ), while average annual area loss rates have nearly tripled in the past two decades. Over the 1959–2018 period, glacier-wide ice-thickness change averaged −22.7 ± 4.7 m, corresponding to a mean specific annual mass balance of −347.0 ± 71.4 mm w.e. a −1 . Projecting rates of area and volume change into the future indicates that the glacier will likely entirely disappear between 2030 and 2060. This study demonstrates the potential of SfM-MVS processing to generate elevation products from 1950/60s historical aerial photographs, and to extend observations of ice elevation and glacier volume change for the Canadian Arctic, prior to the satellite record. Article in Journal/Newspaper Arctic Ellesmere Island glacier* Journal of Glaciology Cambridge University Press Arctic Ellesmere Island Canada Bowman Glacier ENVELOPE(-162.000,-162.000,-85.567,-85.567) Journal of Glaciology 1 14 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Medrzycka, Dorota Copland, Luke Noël, Brice Rapid demise and committed loss of Bowman Glacier, northern Ellesmere Island, Arctic Canada |
topic_facet |
Earth-Surface Processes |
description |
Abstract Using historical and recent aerial photography and structure from motion (SfM) multiview stereo (MVS) techniques, we reconstruct the 1959 and 2018 ice surface topography and determine the geodetic mass balance of Bowman Glacier, a small mountain glacier on northern Ellesmere Island. This is combined with optical satellite imagery to reconstruct the evolution in extent of the glacier over six decades, and ground-penetrating radar measurements of ice thickness to estimate the remaining ice volume. Between 1959 and 2020, Bowman Glacier lost 78% of its extent (reducing from 2.75 to 0.61 km 2 ), while average annual area loss rates have nearly tripled in the past two decades. Over the 1959–2018 period, glacier-wide ice-thickness change averaged −22.7 ± 4.7 m, corresponding to a mean specific annual mass balance of −347.0 ± 71.4 mm w.e. a −1 . Projecting rates of area and volume change into the future indicates that the glacier will likely entirely disappear between 2030 and 2060. This study demonstrates the potential of SfM-MVS processing to generate elevation products from 1950/60s historical aerial photographs, and to extend observations of ice elevation and glacier volume change for the Canadian Arctic, prior to the satellite record. |
format |
Article in Journal/Newspaper |
author |
Medrzycka, Dorota Copland, Luke Noël, Brice |
author_facet |
Medrzycka, Dorota Copland, Luke Noël, Brice |
author_sort |
Medrzycka, Dorota |
title |
Rapid demise and committed loss of Bowman Glacier, northern Ellesmere Island, Arctic Canada |
title_short |
Rapid demise and committed loss of Bowman Glacier, northern Ellesmere Island, Arctic Canada |
title_full |
Rapid demise and committed loss of Bowman Glacier, northern Ellesmere Island, Arctic Canada |
title_fullStr |
Rapid demise and committed loss of Bowman Glacier, northern Ellesmere Island, Arctic Canada |
title_full_unstemmed |
Rapid demise and committed loss of Bowman Glacier, northern Ellesmere Island, Arctic Canada |
title_sort |
rapid demise and committed loss of bowman glacier, northern ellesmere island, arctic canada |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2022.119 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022001198 |
long_lat |
ENVELOPE(-162.000,-162.000,-85.567,-85.567) |
geographic |
Arctic Ellesmere Island Canada Bowman Glacier |
geographic_facet |
Arctic Ellesmere Island Canada Bowman Glacier |
genre |
Arctic Ellesmere Island glacier* Journal of Glaciology |
genre_facet |
Arctic Ellesmere Island glacier* Journal of Glaciology |
op_source |
Journal of Glaciology volume 69, issue 276, page 997-1010 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2022.119 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
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14 |
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1792497339575828480 |