Quantification of Changes for the Milne Ice Shelf, Nunavut, Canada, 1950 - 2009
This study presents a comprehensive overview of the current state of the Milne Ice Shelf and how it has changed over the last 59 years. The 205 ±1 km2 ice shelf experienced a 28% (82 ±0.8 km2) reduction in area between 1950 – 2009, and a 20% (2.5 ±0.9km3 water equivalent (w.e.)) reduction in volume...
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Université d'Ottawa / University of Ottawa
2011
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Online Access: | http://hdl.handle.net/10393/19773 https://doi.org/10.20381/ruor-4428 |
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ftunivottawa:oai:ruor.uottawa.ca:10393/19773 2023-05-15T15:04:36+02:00 Quantification of Changes for the Milne Ice Shelf, Nunavut, Canada, 1950 - 2009 Mortimer, Colleen Adel Copland, Luke 2011 application/pdf http://hdl.handle.net/10393/19773 https://doi.org/10.20381/ruor-4428 en eng Université d'Ottawa / University of Ottawa http://hdl.handle.net/10393/19773 http://dx.doi.org/10.20381/ruor-4428 Ice Shelf Arctic change Nunavut Glaciology Ground penetrating radar Ellesmere Island Thesis 2011 ftunivottawa https://doi.org/10.20381/ruor-4428 2021-01-04T17:06:48Z This study presents a comprehensive overview of the current state of the Milne Ice Shelf and how it has changed over the last 59 years. The 205 ±1 km2 ice shelf experienced a 28% (82 ±0.8 km2) reduction in area between 1950 – 2009, and a 20% (2.5 ±0.9km3 water equivalent (w.e.)) reduction in volume between 1981 – 2008/2009, suggesting a long-term state of negative mass balance. Comparison of mean annual specific mass balances (up to -0.34 m w.e. yr-1) with surface mass balance measurements for the nearby Ward Hunt Ice Shelf suggest that basal melt is a key contributor to total ice shelf thinning. The development and expansion of new and existing surface cracks, as well as ice-marginal and epishelf lake development, indicate significant ice shelf weakening. Over the next few decades it is likely that the Milne Ice Shelf will continue to deteriorate. Thesis Arctic Ellesmere Island Ice Shelf Milne Ice Shelf Nunavut Ward Hunt Ice Shelf uO Research (University of Ottawa - uOttawa) Arctic Canada Ellesmere Island Milne Ice Shelf ENVELOPE(-81.747,-81.747,82.736,82.736) Nunavut Ward Hunt Ice Shelf ENVELOPE(-73.499,-73.499,83.122,83.122) |
institution |
Open Polar |
collection |
uO Research (University of Ottawa - uOttawa) |
op_collection_id |
ftunivottawa |
language |
English |
topic |
Ice Shelf Arctic change Nunavut Glaciology Ground penetrating radar Ellesmere Island |
spellingShingle |
Ice Shelf Arctic change Nunavut Glaciology Ground penetrating radar Ellesmere Island Mortimer, Colleen Adel Quantification of Changes for the Milne Ice Shelf, Nunavut, Canada, 1950 - 2009 |
topic_facet |
Ice Shelf Arctic change Nunavut Glaciology Ground penetrating radar Ellesmere Island |
description |
This study presents a comprehensive overview of the current state of the Milne Ice Shelf and how it has changed over the last 59 years. The 205 ±1 km2 ice shelf experienced a 28% (82 ±0.8 km2) reduction in area between 1950 – 2009, and a 20% (2.5 ±0.9km3 water equivalent (w.e.)) reduction in volume between 1981 – 2008/2009, suggesting a long-term state of negative mass balance. Comparison of mean annual specific mass balances (up to -0.34 m w.e. yr-1) with surface mass balance measurements for the nearby Ward Hunt Ice Shelf suggest that basal melt is a key contributor to total ice shelf thinning. The development and expansion of new and existing surface cracks, as well as ice-marginal and epishelf lake development, indicate significant ice shelf weakening. Over the next few decades it is likely that the Milne Ice Shelf will continue to deteriorate. |
author2 |
Copland, Luke |
format |
Thesis |
author |
Mortimer, Colleen Adel |
author_facet |
Mortimer, Colleen Adel |
author_sort |
Mortimer, Colleen Adel |
title |
Quantification of Changes for the Milne Ice Shelf, Nunavut, Canada, 1950 - 2009 |
title_short |
Quantification of Changes for the Milne Ice Shelf, Nunavut, Canada, 1950 - 2009 |
title_full |
Quantification of Changes for the Milne Ice Shelf, Nunavut, Canada, 1950 - 2009 |
title_fullStr |
Quantification of Changes for the Milne Ice Shelf, Nunavut, Canada, 1950 - 2009 |
title_full_unstemmed |
Quantification of Changes for the Milne Ice Shelf, Nunavut, Canada, 1950 - 2009 |
title_sort |
quantification of changes for the milne ice shelf, nunavut, canada, 1950 - 2009 |
publisher |
Université d'Ottawa / University of Ottawa |
publishDate |
2011 |
url |
http://hdl.handle.net/10393/19773 https://doi.org/10.20381/ruor-4428 |
long_lat |
ENVELOPE(-81.747,-81.747,82.736,82.736) ENVELOPE(-73.499,-73.499,83.122,83.122) |
geographic |
Arctic Canada Ellesmere Island Milne Ice Shelf Nunavut Ward Hunt Ice Shelf |
geographic_facet |
Arctic Canada Ellesmere Island Milne Ice Shelf Nunavut Ward Hunt Ice Shelf |
genre |
Arctic Ellesmere Island Ice Shelf Milne Ice Shelf Nunavut Ward Hunt Ice Shelf |
genre_facet |
Arctic Ellesmere Island Ice Shelf Milne Ice Shelf Nunavut Ward Hunt Ice Shelf |
op_relation |
http://hdl.handle.net/10393/19773 http://dx.doi.org/10.20381/ruor-4428 |
op_doi |
https://doi.org/10.20381/ruor-4428 |
_version_ |
1766336345064603648 |