Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: implications for ice shelf thickness
Changes in the depth of the freshwater–seawater interface in epishelf lakes have been used to infer long-term changes in the minimum thickness of ice shelves; however, little is known about the dynamics of epishelf lakes and what other factors may influence their depth. Continuous observations colle...
Published in: | The Cryosphere |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00008939 2023-05-15T14:53:31+02:00 Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: implications for ice shelf thickness Hamilton, Andrew K. Laval, Bernard E. Mueller, Derek R. Vincent, Warwick F. Copland, Luke 2017-09 electronic https://doi.org/10.5194/tc-11-2189-2017 https://noa.gwlb.de/receive/cop_mods_00008939 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008896/tc-11-2189-2017.pdf https://tc.copernicus.org/articles/11/2189/2017/tc-11-2189-2017.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-11-2189-2017 https://noa.gwlb.de/receive/cop_mods_00008939 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008896/tc-11-2189-2017.pdf https://tc.copernicus.org/articles/11/2189/2017/tc-11-2189-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/tc-11-2189-2017 2022-02-08T22:57:48Z Changes in the depth of the freshwater–seawater interface in epishelf lakes have been used to infer long-term changes in the minimum thickness of ice shelves; however, little is known about the dynamics of epishelf lakes and what other factors may influence their depth. Continuous observations collected between 2011 and 2014 in the Milne Fiord epishelf lake, in the Canadian Arctic, showed that the depth of the halocline varied seasonally by up to 3.3 m, which was comparable to interannual variability. The seasonal depth variation was controlled by the magnitude of surface meltwater inflow and the hydraulics of the inferred outflow pathway, a narrow basal channel in the Milne Ice Shelf. When seasonal variation and an episodic mixing of the halocline were accounted for, long-term records of depth indicated there was no significant change in thickness of ice along the basal channel from 1983 to 2004, followed by a period of steady thinning at 0.50 m a−1 between 2004 and 2011. Rapid thinning at 1.15 m a−1 then occurred from 2011 to 2014, corresponding to a period of warming regional air temperatures. Continued warming is expected to lead to the breakup of the ice shelf and the imminent loss of the last known epishelf lake in the Arctic. Article in Journal/Newspaper Arctic Ice Shelf Ice Shelves Milne Fiord Milne Ice Shelf The Cryosphere Niedersächsisches Online-Archiv NOA Arctic Milne Fiord ENVELOPE(-81.447,-81.447,82.636,82.636) Milne Ice Shelf ENVELOPE(-81.747,-81.747,82.736,82.736) The Cryosphere 11 5 2189 2211 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Hamilton, Andrew K. Laval, Bernard E. Mueller, Derek R. Vincent, Warwick F. Copland, Luke Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: implications for ice shelf thickness |
topic_facet |
article Verlagsveröffentlichung |
description |
Changes in the depth of the freshwater–seawater interface in epishelf lakes have been used to infer long-term changes in the minimum thickness of ice shelves; however, little is known about the dynamics of epishelf lakes and what other factors may influence their depth. Continuous observations collected between 2011 and 2014 in the Milne Fiord epishelf lake, in the Canadian Arctic, showed that the depth of the halocline varied seasonally by up to 3.3 m, which was comparable to interannual variability. The seasonal depth variation was controlled by the magnitude of surface meltwater inflow and the hydraulics of the inferred outflow pathway, a narrow basal channel in the Milne Ice Shelf. When seasonal variation and an episodic mixing of the halocline were accounted for, long-term records of depth indicated there was no significant change in thickness of ice along the basal channel from 1983 to 2004, followed by a period of steady thinning at 0.50 m a−1 between 2004 and 2011. Rapid thinning at 1.15 m a−1 then occurred from 2011 to 2014, corresponding to a period of warming regional air temperatures. Continued warming is expected to lead to the breakup of the ice shelf and the imminent loss of the last known epishelf lake in the Arctic. |
format |
Article in Journal/Newspaper |
author |
Hamilton, Andrew K. Laval, Bernard E. Mueller, Derek R. Vincent, Warwick F. Copland, Luke |
author_facet |
Hamilton, Andrew K. Laval, Bernard E. Mueller, Derek R. Vincent, Warwick F. Copland, Luke |
author_sort |
Hamilton, Andrew K. |
title |
Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: implications for ice shelf thickness |
title_short |
Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: implications for ice shelf thickness |
title_full |
Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: implications for ice shelf thickness |
title_fullStr |
Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: implications for ice shelf thickness |
title_full_unstemmed |
Dynamic response of an Arctic epishelf lake to seasonal and long-term forcing: implications for ice shelf thickness |
title_sort |
dynamic response of an arctic epishelf lake to seasonal and long-term forcing: implications for ice shelf thickness |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-2189-2017 https://noa.gwlb.de/receive/cop_mods_00008939 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008896/tc-11-2189-2017.pdf https://tc.copernicus.org/articles/11/2189/2017/tc-11-2189-2017.pdf |
long_lat |
ENVELOPE(-81.447,-81.447,82.636,82.636) ENVELOPE(-81.747,-81.747,82.736,82.736) |
geographic |
Arctic Milne Fiord Milne Ice Shelf |
geographic_facet |
Arctic Milne Fiord Milne Ice Shelf |
genre |
Arctic Ice Shelf Ice Shelves Milne Fiord Milne Ice Shelf The Cryosphere |
genre_facet |
Arctic Ice Shelf Ice Shelves Milne Fiord Milne Ice Shelf The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-11-2189-2017 https://noa.gwlb.de/receive/cop_mods_00008939 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008896/tc-11-2189-2017.pdf https://tc.copernicus.org/articles/11/2189/2017/tc-11-2189-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-11-2189-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
5 |
container_start_page |
2189 |
op_container_end_page |
2211 |
_version_ |
1766325116478685184 |