Stability of the floating ice shelf of the Petermann glacier and its response to a changing environment
Nearly all major glaciers in Greenland have reduced in size over the last two decades. An increase in the amount of ice transported from the Greenland ice sheet to the oceans is predicted following an increase in Arctic air and ocean temperatures. One of the last glaciers with a floating ice shelf a...
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fttudelft:oai:tudelft.nl:uuid:33bc746a-472d-4919-af26-e12896bf9abb 2023-07-30T04:02:12+02:00 Stability of the floating ice shelf of the Petermann glacier and its response to a changing environment Rosier, Job (author) Lhermitte, Stef (mentor) Mottram, Ruth (graduation committee) Delft University of Technology (degree granting institution) 2019-08-19 http://resolver.tudelft.nl/uuid:33bc746a-472d-4919-af26-e12896bf9abb en eng http://resolver.tudelft.nl/uuid:33bc746a-472d-4919-af26-e12896bf9abb © 2019 Job Rosier glacier Climate change Remote Sensing master thesis 2019 fttudelft 2023-07-08T20:36:37Z Nearly all major glaciers in Greenland have reduced in size over the last two decades. An increase in the amount of ice transported from the Greenland ice sheet to the oceans is predicted following an increase in Arctic air and ocean temperatures. One of the last glaciers with a floating ice shelf and draining a substantial area of the Greenland ice sheet is the Petermann glacier in North West Greenland. With two major calving events in 2010 and 2012 the extent of its floating ice shelf was reduced to only half of that prior to 2010 and since 2016 new fractures indicate a new calving event is predicted to reduce the length of the glacier by ~14 km. Multiple studies have indicated that after the major calving event of 2012 the glacier accelerated and a new increase in the velocity, possibly linked to the next calving event, has already been observed. With every part of the glacier’s ice shelf that is lost the resistive force that holds the glacier back is reduced and the amount of ice drained to the ocean increases. Losing its entire ice shelf could lead to a significant increase in the contribution of the Petermann glacier to global sea level rise as the Petermann fjord extends inlands below sea level for nearly a hundred kilometers. This study uses ice thickness and surface elevation data combined with velocity data from different sources to analyze the current and future stability of the Petermann glacier. Ice thickness and the velocity data is used as input in a fracture model in order to investigate the different contributions of stress, thinning and an increase in the availability of surface water to the depth crevasses can reach. The areas on the glacier that show locations where crevasses penetrate deep into the ice indicate that the glacier is vulnerable to fracturing in those spots. Connected weak spots might indicate further potential for future calving events. The results derived from the thickness data and the subsequent melt rates show that near the grounding line the glacier is experiencing ... Master Thesis Arctic Climate change glacier Greenland Ice Sheet Ice Shelf Petermann Fjord Petermann glacier Delft University of Technology: Institutional Repository Arctic Greenland Petermann Fjord ENVELOPE(-61.500,-61.500,81.167,81.167) |
institution |
Open Polar |
collection |
Delft University of Technology: Institutional Repository |
op_collection_id |
fttudelft |
language |
English |
topic |
glacier Climate change Remote Sensing |
spellingShingle |
glacier Climate change Remote Sensing Rosier, Job (author) Stability of the floating ice shelf of the Petermann glacier and its response to a changing environment |
topic_facet |
glacier Climate change Remote Sensing |
description |
Nearly all major glaciers in Greenland have reduced in size over the last two decades. An increase in the amount of ice transported from the Greenland ice sheet to the oceans is predicted following an increase in Arctic air and ocean temperatures. One of the last glaciers with a floating ice shelf and draining a substantial area of the Greenland ice sheet is the Petermann glacier in North West Greenland. With two major calving events in 2010 and 2012 the extent of its floating ice shelf was reduced to only half of that prior to 2010 and since 2016 new fractures indicate a new calving event is predicted to reduce the length of the glacier by ~14 km. Multiple studies have indicated that after the major calving event of 2012 the glacier accelerated and a new increase in the velocity, possibly linked to the next calving event, has already been observed. With every part of the glacier’s ice shelf that is lost the resistive force that holds the glacier back is reduced and the amount of ice drained to the ocean increases. Losing its entire ice shelf could lead to a significant increase in the contribution of the Petermann glacier to global sea level rise as the Petermann fjord extends inlands below sea level for nearly a hundred kilometers. This study uses ice thickness and surface elevation data combined with velocity data from different sources to analyze the current and future stability of the Petermann glacier. Ice thickness and the velocity data is used as input in a fracture model in order to investigate the different contributions of stress, thinning and an increase in the availability of surface water to the depth crevasses can reach. The areas on the glacier that show locations where crevasses penetrate deep into the ice indicate that the glacier is vulnerable to fracturing in those spots. Connected weak spots might indicate further potential for future calving events. The results derived from the thickness data and the subsequent melt rates show that near the grounding line the glacier is experiencing ... |
author2 |
Lhermitte, Stef (mentor) Mottram, Ruth (graduation committee) Delft University of Technology (degree granting institution) |
format |
Master Thesis |
author |
Rosier, Job (author) |
author_facet |
Rosier, Job (author) |
author_sort |
Rosier, Job (author) |
title |
Stability of the floating ice shelf of the Petermann glacier and its response to a changing environment |
title_short |
Stability of the floating ice shelf of the Petermann glacier and its response to a changing environment |
title_full |
Stability of the floating ice shelf of the Petermann glacier and its response to a changing environment |
title_fullStr |
Stability of the floating ice shelf of the Petermann glacier and its response to a changing environment |
title_full_unstemmed |
Stability of the floating ice shelf of the Petermann glacier and its response to a changing environment |
title_sort |
stability of the floating ice shelf of the petermann glacier and its response to a changing environment |
publishDate |
2019 |
url |
http://resolver.tudelft.nl/uuid:33bc746a-472d-4919-af26-e12896bf9abb |
long_lat |
ENVELOPE(-61.500,-61.500,81.167,81.167) |
geographic |
Arctic Greenland Petermann Fjord |
geographic_facet |
Arctic Greenland Petermann Fjord |
genre |
Arctic Climate change glacier Greenland Ice Sheet Ice Shelf Petermann Fjord Petermann glacier |
genre_facet |
Arctic Climate change glacier Greenland Ice Sheet Ice Shelf Petermann Fjord Petermann glacier |
op_relation |
http://resolver.tudelft.nl/uuid:33bc746a-472d-4919-af26-e12896bf9abb |
op_rights |
© 2019 Job Rosier |
_version_ |
1772812924568469504 |