Calculated variations of annual ice ablation at the margin of the Greenland ice sheet, West Greenland, 1961–90
Abstract Annual ice ablation has been measured at three locations at the margin of the Greenland ice sheet: Nordbogletscher (for 6 years: 1977–78 to 1982– 83), Qamanârssûp sermia (8 years: 1979–80 to 1986–87) and at Paakitsup Akuliarusersua (7 years: 1982–83 to the present). As the data sets cover d...
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Cambridge University Press (CUP)
1992
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Online Access: | http://dx.doi.org/10.1017/s0022143000003671 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000003671 |
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crcambridgeupr:10.1017/s0022143000003671 2024-03-03T08:44:56+00:00 Calculated variations of annual ice ablation at the margin of the Greenland ice sheet, West Greenland, 1961–90 Braithwaite, Roger J. Olesen, Ole Β. HøJmark Thomsen, Henrik 1992 http://dx.doi.org/10.1017/s0022143000003671 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000003671 en eng Cambridge University Press (CUP) Journal of Glaciology volume 38, issue 129, page 266-272 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1992 crcambridgeupr https://doi.org/10.1017/s0022143000003671 2024-02-08T08:42:50Z Abstract Annual ice ablation has been measured at three locations at the margin of the Greenland ice sheet: Nordbogletscher (for 6 years: 1977–78 to 1982– 83), Qamanârssûp sermia (8 years: 1979–80 to 1986–87) and at Paakitsup Akuliarusersua (7 years: 1982–83 to the present). As the data sets cover different periods, it is difficult to compare ablation directly between the three sites. However, measured series at each site can be extended over the last 30 years (1961–90) by simulations using climatic data, and the extended data series can be compared. The pattern of calculated ablation variations at the three locations is remarkably similar with no sign of any trend towards increased ablation in recent years. There was generally low ablation from the mid-1970s to the mid-1980s that may explain the recent thickening of the ablation area which has been detected by satellite radar altimetry. Ablation varies substantially from year to year, e.g. with a standard deviation of the order of ±0.5 m water a −1 , and any future monitoring programme must detect trends of increasing ablation against this background of natural variations. Article in Journal/Newspaper Greenland Ice Sheet Journal of Glaciology Cambridge University Press Greenland Qamanârssûp Sermia ENVELOPE(-49.500,-49.500,64.483,64.483) Journal of Glaciology 38 129 266 272 |
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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 Braithwaite, Roger J. Olesen, Ole Β. HøJmark Thomsen, Henrik Calculated variations of annual ice ablation at the margin of the Greenland ice sheet, West Greenland, 1961–90 |
topic_facet |
Earth-Surface Processes |
description |
Abstract Annual ice ablation has been measured at three locations at the margin of the Greenland ice sheet: Nordbogletscher (for 6 years: 1977–78 to 1982– 83), Qamanârssûp sermia (8 years: 1979–80 to 1986–87) and at Paakitsup Akuliarusersua (7 years: 1982–83 to the present). As the data sets cover different periods, it is difficult to compare ablation directly between the three sites. However, measured series at each site can be extended over the last 30 years (1961–90) by simulations using climatic data, and the extended data series can be compared. The pattern of calculated ablation variations at the three locations is remarkably similar with no sign of any trend towards increased ablation in recent years. There was generally low ablation from the mid-1970s to the mid-1980s that may explain the recent thickening of the ablation area which has been detected by satellite radar altimetry. Ablation varies substantially from year to year, e.g. with a standard deviation of the order of ±0.5 m water a −1 , and any future monitoring programme must detect trends of increasing ablation against this background of natural variations. |
format |
Article in Journal/Newspaper |
author |
Braithwaite, Roger J. Olesen, Ole Β. HøJmark Thomsen, Henrik |
author_facet |
Braithwaite, Roger J. Olesen, Ole Β. HøJmark Thomsen, Henrik |
author_sort |
Braithwaite, Roger J. |
title |
Calculated variations of annual ice ablation at the margin of the Greenland ice sheet, West Greenland, 1961–90 |
title_short |
Calculated variations of annual ice ablation at the margin of the Greenland ice sheet, West Greenland, 1961–90 |
title_full |
Calculated variations of annual ice ablation at the margin of the Greenland ice sheet, West Greenland, 1961–90 |
title_fullStr |
Calculated variations of annual ice ablation at the margin of the Greenland ice sheet, West Greenland, 1961–90 |
title_full_unstemmed |
Calculated variations of annual ice ablation at the margin of the Greenland ice sheet, West Greenland, 1961–90 |
title_sort |
calculated variations of annual ice ablation at the margin of the greenland ice sheet, west greenland, 1961–90 |
publisher |
Cambridge University Press (CUP) |
publishDate |
1992 |
url |
http://dx.doi.org/10.1017/s0022143000003671 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000003671 |
long_lat |
ENVELOPE(-49.500,-49.500,64.483,64.483) |
geographic |
Greenland Qamanârssûp Sermia |
geographic_facet |
Greenland Qamanârssûp Sermia |
genre |
Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 38, issue 129, page 266-272 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000003671 |
container_title |
Journal of Glaciology |
container_volume |
38 |
container_issue |
129 |
container_start_page |
266 |
op_container_end_page |
272 |
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1792500458611277824 |