Distinct patterns of seasonal Greenland glacier velocity
Predicting Greenland Ice Sheet mass loss due to ice dynamics requires a complete understanding of spatiotemporal velocity fluctuations and related control mechanisms. We present a 5 year record of seasonal velocity measurements for 55 marine-terminating glaciers distributed around the ice sheet marg...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , , , , |
Format: | Text |
Language: | English |
Published: |
BlackWell Publishing Ltd
2014
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4373171 https://doi.org/10.1002/2014GL061836 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:4373171 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:4373171 2023-05-15T16:21:00+02:00 Distinct patterns of seasonal Greenland glacier velocity Moon, Twila Joughin, Ian Smith, Ben van den Broeke, Michiel R van de Berg, Willem Jan Noël, Brice Usher, Mika 2014-10-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4373171 https://doi.org/10.1002/2014GL061836 en eng BlackWell Publishing Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1002/2014GL061836 ©2014. The Authors. http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. CC-BY-NC-ND Research Letters Text 2014 ftpubmed https://doi.org/10.1002/2014GL061836 2015-03-29T01:08:53Z Predicting Greenland Ice Sheet mass loss due to ice dynamics requires a complete understanding of spatiotemporal velocity fluctuations and related control mechanisms. We present a 5 year record of seasonal velocity measurements for 55 marine-terminating glaciers distributed around the ice sheet margin, along with ice-front position and runoff data sets for each glacier. Among glaciers with substantial speed variations, we find three distinct seasonal velocity patterns. One pattern indicates relatively high glacier sensitivity to ice-front position. The other two patterns are more prevalent and appear to be meltwater controlled. These patterns reveal differences in which some subglacial systems likely transition seasonally from inefficient, distributed hydrologic networks to efficient, channelized drainage, while others do not. The difference may be determined by meltwater availability, which in some regions may be influenced by perennial firn aquifers. Our results highlight the need to understand subglacial meltwater availability on an ice sheet-wide scale to predict future dynamic changes. Text glacier Greenland Ice Sheet PubMed Central (PMC) Greenland Geophysical Research Letters 41 20 7209 7216 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Research Letters |
spellingShingle |
Research Letters Moon, Twila Joughin, Ian Smith, Ben van den Broeke, Michiel R van de Berg, Willem Jan Noël, Brice Usher, Mika Distinct patterns of seasonal Greenland glacier velocity |
topic_facet |
Research Letters |
description |
Predicting Greenland Ice Sheet mass loss due to ice dynamics requires a complete understanding of spatiotemporal velocity fluctuations and related control mechanisms. We present a 5 year record of seasonal velocity measurements for 55 marine-terminating glaciers distributed around the ice sheet margin, along with ice-front position and runoff data sets for each glacier. Among glaciers with substantial speed variations, we find three distinct seasonal velocity patterns. One pattern indicates relatively high glacier sensitivity to ice-front position. The other two patterns are more prevalent and appear to be meltwater controlled. These patterns reveal differences in which some subglacial systems likely transition seasonally from inefficient, distributed hydrologic networks to efficient, channelized drainage, while others do not. The difference may be determined by meltwater availability, which in some regions may be influenced by perennial firn aquifers. Our results highlight the need to understand subglacial meltwater availability on an ice sheet-wide scale to predict future dynamic changes. |
format |
Text |
author |
Moon, Twila Joughin, Ian Smith, Ben van den Broeke, Michiel R van de Berg, Willem Jan Noël, Brice Usher, Mika |
author_facet |
Moon, Twila Joughin, Ian Smith, Ben van den Broeke, Michiel R van de Berg, Willem Jan Noël, Brice Usher, Mika |
author_sort |
Moon, Twila |
title |
Distinct patterns of seasonal Greenland glacier velocity |
title_short |
Distinct patterns of seasonal Greenland glacier velocity |
title_full |
Distinct patterns of seasonal Greenland glacier velocity |
title_fullStr |
Distinct patterns of seasonal Greenland glacier velocity |
title_full_unstemmed |
Distinct patterns of seasonal Greenland glacier velocity |
title_sort |
distinct patterns of seasonal greenland glacier velocity |
publisher |
BlackWell Publishing Ltd |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4373171 https://doi.org/10.1002/2014GL061836 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1002/2014GL061836 |
op_rights |
©2014. The Authors. http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/2014GL061836 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
20 |
container_start_page |
7209 |
op_container_end_page |
7216 |
_version_ |
1766009016290377728 |