Surface accumulation in Northern Central Greenland during the last 300 years
Abstract The internal stratigraphy of snow and ice as imaged by ground-penetrating radar may serve as a source of information on past accumulation. This study presents results from two ground-based radar surveys conducted in Greenland in 2007 and 2015, respectively. The first survey was conducted du...
Published in: | Annals of Glaciology |
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crcambridgeupr:10.1017/aog.2020.30 2024-06-09T07:38:31+00:00 Surface accumulation in Northern Central Greenland during the last 300 years Karlsson, Nanna B. Razik, Sebastian Hörhold, Maria Winter, Anna Steinhage, Daniel Binder, Tobias Eisen, Olaf 2020 http://dx.doi.org/10.1017/aog.2020.30 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305520000300 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by-nc-sa/4.0/ Annals of Glaciology volume 61, issue 81, page 214-224 ISSN 0260-3055 1727-5644 journal-article 2020 crcambridgeupr https://doi.org/10.1017/aog.2020.30 2024-05-15T13:03:05Z Abstract The internal stratigraphy of snow and ice as imaged by ground-penetrating radar may serve as a source of information on past accumulation. This study presents results from two ground-based radar surveys conducted in Greenland in 2007 and 2015, respectively. The first survey was conducted during the traverse from the ice-core station NGRIP (North Greenland Ice Core Project) to the ice-core station NEEM (North Greenland Eemian Ice Drilling). The second survey was carried out during the traverse from NEEM to the ice-core station EGRIP (East Greenland Ice Core Project) and then onwards to Summit Station. The total length of the radar profiles is 1427 km. From the radar data, we retrieve the large-scale spatial variation of the accumulation rates in the interior of the ice sheet. The accumulation rates range from 0.11 to 0.26 m a −1 ice equivalent with the lowest values found in the northeastern sector towards EGRIP. We find no evidence of temporal or spatial changes in accumulation rates when comparing the 150-year average accumulation rates with the 321-year average accumulation rates. Comparisons with regional climate models reveal that the models underestimate accumulation rates by up to 35% in northeastern Greenland. Our results serve as a robust baseline to detect present changes in either surface accumulation rates or patterns. Article in Journal/Newspaper Annals of Glaciology East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet NGRIP North Greenland North Greenland Ice Core Project Cambridge University Press Greenland Annals of Glaciology 61 81 214 224 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The internal stratigraphy of snow and ice as imaged by ground-penetrating radar may serve as a source of information on past accumulation. This study presents results from two ground-based radar surveys conducted in Greenland in 2007 and 2015, respectively. The first survey was conducted during the traverse from the ice-core station NGRIP (North Greenland Ice Core Project) to the ice-core station NEEM (North Greenland Eemian Ice Drilling). The second survey was carried out during the traverse from NEEM to the ice-core station EGRIP (East Greenland Ice Core Project) and then onwards to Summit Station. The total length of the radar profiles is 1427 km. From the radar data, we retrieve the large-scale spatial variation of the accumulation rates in the interior of the ice sheet. The accumulation rates range from 0.11 to 0.26 m a −1 ice equivalent with the lowest values found in the northeastern sector towards EGRIP. We find no evidence of temporal or spatial changes in accumulation rates when comparing the 150-year average accumulation rates with the 321-year average accumulation rates. Comparisons with regional climate models reveal that the models underestimate accumulation rates by up to 35% in northeastern Greenland. Our results serve as a robust baseline to detect present changes in either surface accumulation rates or patterns. |
format |
Article in Journal/Newspaper |
author |
Karlsson, Nanna B. Razik, Sebastian Hörhold, Maria Winter, Anna Steinhage, Daniel Binder, Tobias Eisen, Olaf |
spellingShingle |
Karlsson, Nanna B. Razik, Sebastian Hörhold, Maria Winter, Anna Steinhage, Daniel Binder, Tobias Eisen, Olaf Surface accumulation in Northern Central Greenland during the last 300 years |
author_facet |
Karlsson, Nanna B. Razik, Sebastian Hörhold, Maria Winter, Anna Steinhage, Daniel Binder, Tobias Eisen, Olaf |
author_sort |
Karlsson, Nanna B. |
title |
Surface accumulation in Northern Central Greenland during the last 300 years |
title_short |
Surface accumulation in Northern Central Greenland during the last 300 years |
title_full |
Surface accumulation in Northern Central Greenland during the last 300 years |
title_fullStr |
Surface accumulation in Northern Central Greenland during the last 300 years |
title_full_unstemmed |
Surface accumulation in Northern Central Greenland during the last 300 years |
title_sort |
surface accumulation in northern central greenland during the last 300 years |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/aog.2020.30 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305520000300 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Annals of Glaciology East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet NGRIP North Greenland North Greenland Ice Core Project |
genre_facet |
Annals of Glaciology East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet NGRIP North Greenland North Greenland Ice Core Project |
op_source |
Annals of Glaciology volume 61, issue 81, page 214-224 ISSN 0260-3055 1727-5644 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ |
op_doi |
https://doi.org/10.1017/aog.2020.30 |
container_title |
Annals of Glaciology |
container_volume |
61 |
container_issue |
81 |
container_start_page |
214 |
op_container_end_page |
224 |
_version_ |
1801373348345675776 |