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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Cambridge University Press
2016
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Online Access: | https://doi.org/10.1017/aog.2016.19 https://doaj.org/article/cff3d51c8b96457ba190bc5cb06d5f7d |
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ftdoajarticles:oai:doaj.org/article:cff3d51c8b96457ba190bc5cb06d5f7d 2023-05-15T13:29:37+02:00 Contrasts in the response of adjacent fjords and glaciers to ice-sheet surface melt in West Greenland Timothy C. Bartholomaus Leigh A. Stearns David A. Sutherland Emily L. Shroyer Jonathan D. Nash Ryan T. Walker Ginny Catania Denis Felikson Dustin Carroll Mason J. Fried Brice P. Y. Noël Michiel R. Van Den Broeke 2016-09-01T00:00:00Z https://doi.org/10.1017/aog.2016.19 https://doaj.org/article/cff3d51c8b96457ba190bc5cb06d5f7d EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305516000197/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2016.19 0260-3055 1727-5644 https://doaj.org/article/cff3d51c8b96457ba190bc5cb06d5f7d Annals of Glaciology, Vol 57, Pp 25-38 (2016) atmosphere/ice/ocean interactions ice velocity ice/ocean interactions iceberg calving subglacial processes Meteorology. Climatology QC851-999 article 2016 ftdoajarticles https://doi.org/10.1017/aog.2016.19 2023-03-12T01:31:57Z 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 Directory of Open Access Journals: DOAJ Articles Greenland Annals of Glaciology 57 73 25 38 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
atmosphere/ice/ocean interactions ice velocity ice/ocean interactions iceberg calving subglacial processes Meteorology. Climatology QC851-999 |
spellingShingle |
atmosphere/ice/ocean interactions ice velocity ice/ocean interactions iceberg calving subglacial processes Meteorology. Climatology QC851-999 Timothy C. Bartholomaus Leigh A. Stearns David A. Sutherland Emily L. Shroyer Jonathan D. Nash Ryan T. Walker Ginny Catania Denis Felikson Dustin Carroll Mason J. Fried Brice P. Y. Noël Michiel R. Van Den Broeke 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 Meteorology. Climatology QC851-999 |
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 |
Timothy C. Bartholomaus Leigh A. Stearns David A. Sutherland Emily L. Shroyer Jonathan D. Nash Ryan T. Walker Ginny Catania Denis Felikson Dustin Carroll Mason J. Fried Brice P. Y. Noël Michiel R. Van Den Broeke |
author_facet |
Timothy C. Bartholomaus Leigh A. Stearns David A. Sutherland Emily L. Shroyer Jonathan D. Nash Ryan T. Walker Ginny Catania Denis Felikson Dustin Carroll Mason J. Fried Brice P. Y. Noël Michiel R. Van Den Broeke |
author_sort |
Timothy C. Bartholomaus |
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://doi.org/10.1017/aog.2016.19 https://doaj.org/article/cff3d51c8b96457ba190bc5cb06d5f7d |
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, Vol 57, Pp 25-38 (2016) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305516000197/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2016.19 0260-3055 1727-5644 https://doaj.org/article/cff3d51c8b96457ba190bc5cb06d5f7d |
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_ |
1766001477046763520 |