Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland
Neighboring tidewater glaciers often exhibit asynchronous dynamic behavior, despite relatively uniform regional atmospheric and oceanic forcings. This variability may be controlled by a combination of local factors, including glacier and fjord geometry, fjord heat content and circulation, and glacie...
Published in: | Annals of Glaciology |
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Online Access: | http://hdl.handle.net/1808/25139 https://doi.org/10.1017/aog.2016.19 |
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ftunivkansas:oai:kuscholarworks.ku.edu:1808/25139 2023-05-15T13:29:45+02:00 Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland Bartholomaus, Timothy C. Stearns, Leigh A. Sutherland, David A. Shroyer, Emily L. Nash, Jonathan D. Walker, Ryan T. Catania, Ginny A. Felikson, Denis Carroll, Dustin Fried, Mason J. Neol, Brice P. Y. van den Broeke, Michiel R. 2017-10-13T19:09:26Z http://hdl.handle.net/1808/25139 https://doi.org/10.1017/aog.2016.19 unknown Cambridge Core Bartholomaus, T. C., Stearns, L. A., Sutherland, D. A., Shroyer, E. L., Nash, J. D., Walker, R. T., . . . Broeke, M. R. (2016). Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland. Annals of Glaciology, 57(73), 25-38. doi:10.1017/aog.2016.19 http://hdl.handle.net/1808/25139 doi:10.1017/aog.2016.19 COPYRIGHT: © The Author(s) 2016 This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence, which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0/ openAccess CC-BY Atmospher/ice/ocean interactions Ice velocity Ice/ocean interactions Iceberg calving Subglacial processes Article 2017 ftunivkansas https://doi.org/10.1017/aog.2016.19 2022-08-26T13:22:21Z Neighboring tidewater glaciers often exhibit asynchronous dynamic behavior, despite relatively uniform regional atmospheric and oceanic forcings. This variability may be controlled by a combination of local factors, including glacier and fjord geometry, fjord heat content and circulation, and glacier surface melt. In order to characterize and understand contrasts in adjacent tidewater glacier and fjord dynamics, we made coincident ice-ocean-atmosphere observations at high temporal resolution (minutes to weeks) within a 10 000 km2 area near Uummannaq, Greenland. Water column velocity, temperature and salinity measurements reveal systematic differences in neighboring fjords that imply contrasting circulation patterns. The observed ocean velocity and hydrography, combined with numerical modeling, suggest that subglacial discharge plays a major role in setting fjord conditions. In addition, satellite remote sensing of seasonal ice flow speed and terminus position reveal both speedup and slow-down in response to melt, as well as differences in calving style among the neighboring glaciers. Glacier force budgets and modeling also point toward subglacial discharge as a key factor in glacier behavior. For the studied region, individual glacier and fjord geometry modulate subglacial discharge, which leads to contrasts in both fjord and glacier dynamics. Article in Journal/Newspaper Annals of Glaciology glacier Greenland Ice Sheet Tidewater Uummannaq The University of Kansas: KU ScholarWorks Greenland Annals of Glaciology 57 73 25 38 |
institution |
Open Polar |
collection |
The University of Kansas: KU ScholarWorks |
op_collection_id |
ftunivkansas |
language |
unknown |
topic |
Atmospher/ice/ocean interactions Ice velocity Ice/ocean interactions Iceberg calving Subglacial processes |
spellingShingle |
Atmospher/ice/ocean interactions Ice velocity Ice/ocean interactions Iceberg calving Subglacial processes Bartholomaus, Timothy C. Stearns, Leigh A. Sutherland, David A. Shroyer, Emily L. Nash, Jonathan D. Walker, Ryan T. Catania, Ginny A. Felikson, Denis Carroll, Dustin Fried, Mason J. Neol, Brice P. Y. van den Broeke, Michiel R. Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland |
topic_facet |
Atmospher/ice/ocean interactions Ice velocity Ice/ocean interactions Iceberg calving Subglacial processes |
description |
Neighboring tidewater glaciers often exhibit asynchronous dynamic behavior, despite relatively uniform regional atmospheric and oceanic forcings. This variability may be controlled by a combination of local factors, including glacier and fjord geometry, fjord heat content and circulation, and glacier surface melt. In order to characterize and understand contrasts in adjacent tidewater glacier and fjord dynamics, we made coincident ice-ocean-atmosphere observations at high temporal resolution (minutes to weeks) within a 10 000 km2 area near Uummannaq, Greenland. Water column velocity, temperature and salinity measurements reveal systematic differences in neighboring fjords that imply contrasting circulation patterns. The observed ocean velocity and hydrography, combined with numerical modeling, suggest that subglacial discharge plays a major role in setting fjord conditions. In addition, satellite remote sensing of seasonal ice flow speed and terminus position reveal both speedup and slow-down in response to melt, as well as differences in calving style among the neighboring glaciers. Glacier force budgets and modeling also point toward subglacial discharge as a key factor in glacier behavior. For the studied region, individual glacier and fjord geometry modulate subglacial discharge, which leads to contrasts in both fjord and glacier dynamics. |
format |
Article in Journal/Newspaper |
author |
Bartholomaus, Timothy C. Stearns, Leigh A. Sutherland, David A. Shroyer, Emily L. Nash, Jonathan D. Walker, Ryan T. Catania, Ginny A. Felikson, Denis Carroll, Dustin Fried, Mason J. Neol, Brice P. Y. van den Broeke, Michiel R. |
author_facet |
Bartholomaus, Timothy C. Stearns, Leigh A. Sutherland, David A. Shroyer, Emily L. Nash, Jonathan D. Walker, Ryan T. Catania, Ginny A. Felikson, Denis Carroll, Dustin Fried, Mason J. Neol, Brice P. Y. van den Broeke, Michiel R. |
author_sort |
Bartholomaus, Timothy C. |
title |
Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland |
title_short |
Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland |
title_full |
Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland |
title_fullStr |
Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland |
title_full_unstemmed |
Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland |
title_sort |
contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in west greenland |
publisher |
Cambridge Core |
publishDate |
2017 |
url |
http://hdl.handle.net/1808/25139 https://doi.org/10.1017/aog.2016.19 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Annals of Glaciology glacier Greenland Ice Sheet Tidewater Uummannaq |
genre_facet |
Annals of Glaciology glacier Greenland Ice Sheet Tidewater Uummannaq |
op_relation |
Bartholomaus, T. C., Stearns, L. A., Sutherland, D. A., Shroyer, E. L., Nash, J. D., Walker, R. T., . . . Broeke, M. R. (2016). Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland. Annals of Glaciology, 57(73), 25-38. doi:10.1017/aog.2016.19 http://hdl.handle.net/1808/25139 doi:10.1017/aog.2016.19 |
op_rights |
COPYRIGHT: © The Author(s) 2016 This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence, which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0/ openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1017/aog.2016.19 |
container_title |
Annals of Glaciology |
container_volume |
57 |
container_issue |
73 |
container_start_page |
25 |
op_container_end_page |
38 |
_version_ |
1766002579661127680 |