Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland
peer reviewed 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 circulati...
Published in: | Annals of Glaciology |
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Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Cambridge University Press
2016
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Online Access: | https://orbi.uliege.be/handle/2268/301894 https://orbi.uliege.be/bitstream/2268/301894/1/Bartholomaus_AoG_2016.pdf https://doi.org/10.1017/aog.2016.19 |
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ftorbi:oai:orbi.ulg.ac.be:2268/301894 2024-10-13T14:01:27+00:00 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 Felikson, Denis Carroll, Dustin Fried, Mason J. Noël, Brice Van Den Broeke, Michiel R. 2016-09 https://orbi.uliege.be/handle/2268/301894 https://orbi.uliege.be/bitstream/2268/301894/1/Bartholomaus_AoG_2016.pdf https://doi.org/10.1017/aog.2016.19 en eng Cambridge University Press https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305516000197 urn:issn:0260-3055 urn:issn:1727-5644 https://orbi.uliege.be/handle/2268/301894 info:hdl:2268/301894 https://orbi.uliege.be/bitstream/2268/301894/1/Bartholomaus_AoG_2016.pdf doi:10.1017/aog.2016.19 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Annals of Glaciology, 57 (73), 25 - 38 (2016-09) atmosphere/ice/ocean interactions ice velocity ice/ocean interactions iceberg calving subglacial processes Earth-Surface Processes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2016 ftorbi https://doi.org/10.1017/aog.2016.19 2024-09-27T07:01:57Z peer reviewed 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 University of Liège: ORBi (Open Repository and Bibliography) Greenland Annals of Glaciology 57 73 25 38 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
atmosphere/ice/ocean interactions ice velocity ice/ocean interactions iceberg calving subglacial processes Earth-Surface Processes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
atmosphere/ice/ocean interactions ice velocity ice/ocean interactions iceberg calving subglacial processes Earth-Surface Processes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Bartholomaus, Timothy C. Stearns, Leigh A. Sutherland, David A. Shroyer, Emily L. Nash, Jonathan D. Walker, Ryan T. Catania, Ginny Felikson, Denis Carroll, Dustin Fried, Mason J. Noël, Brice Van Den Broeke, Michiel R. Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland |
topic_facet |
atmosphere/ice/ocean interactions ice velocity ice/ocean interactions iceberg calving subglacial processes Earth-Surface Processes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed 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 Felikson, Denis Carroll, Dustin Fried, Mason J. Noël, Brice 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 Felikson, Denis Carroll, Dustin Fried, Mason J. Noël, Brice 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 University Press |
publishDate |
2016 |
url |
https://orbi.uliege.be/handle/2268/301894 https://orbi.uliege.be/bitstream/2268/301894/1/Bartholomaus_AoG_2016.pdf 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_source |
Annals of Glaciology, 57 (73), 25 - 38 (2016-09) |
op_relation |
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305516000197 urn:issn:0260-3055 urn:issn:1727-5644 https://orbi.uliege.be/handle/2268/301894 info:hdl:2268/301894 https://orbi.uliege.be/bitstream/2268/301894/1/Bartholomaus_AoG_2016.pdf doi:10.1017/aog.2016.19 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
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_ |
1812810959307145216 |