[1] The floating ice shelf of Petermann glacier interacts directly with the ocean and is thought to lose at least 80 % of its mass through basal melting. Based on three opportunistic ocean surveys in Petermann Fjord we describe the basic oceanography: the circulation at the fjord mouth, the hydrogra...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.689.4582 2023-05-15T15:09:30+02:00 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.4582 http://muenchow.cms.udel.edu/papers/Johnson2010JGR.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.4582 http://muenchow.cms.udel.edu/papers/Johnson2010JGR.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://muenchow.cms.udel.edu/papers/Johnson2010JGR.pdf Serreze et al 2007 Parkinson and Cavalieri 2008 the text ftciteseerx 2016-01-08T18:17:03Z [1] The floating ice shelf of Petermann glacier interacts directly with the ocean and is thought to lose at least 80 % of its mass through basal melting. Based on three opportunistic ocean surveys in Petermann Fjord we describe the basic oceanography: the circulation at the fjord mouth, the hydrographic structure beneath the ice shelf, the oceanic heat delivered to the under‐ice cavity, and the fate of the resulting melt water. The 1100 m deep fjord is separated from neighboring Hall Basin by a sill between 350 and 450 m deep. Fjord bottom waters are renewed by episodic spillover at the sill of Atlantic water from the Arctic. Glacial melt water appears on the northeast side of the fjord at depths between 200 m and that of the glacier’s grounding line (about 500 m). The fjord circulation is fundamentally three‐dimensional; satellite imagery and geostrophic calculations suggest a cyclonic gyre within the fjord mouth, with outflow on the northeast side. Tidal flows are similar in magnitude to the geostrophic flow. The oceanic heat flux into the fjord appears more than sufficient to account for the observed rate of basal melting. Cold, low‐salinity water originating in the surface layer of Nares Strait in winter intrudes far under the ice. This may limit basal melting to the inland half of the shelf. The melt rate and long‐term stability of Petermann ice shelf may depend on regional sea ice cover and fjord geometry, in addition to the supply of oceanic heat entering the fjord. Text Arctic Hall Basin Ice Shelf Nares strait Petermann Fjord Petermann glacier Sea ice Unknown Arctic Hall Basin ENVELOPE(-62.992,-62.992,81.502,81.502) Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Petermann Fjord ENVELOPE(-61.500,-61.500,81.167,81.167) |
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op_collection_id |
ftciteseerx |
language |
English |
topic |
Serreze et al 2007 Parkinson and Cavalieri 2008 the |
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Serreze et al 2007 Parkinson and Cavalieri 2008 the |
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Serreze et al 2007 Parkinson and Cavalieri 2008 the |
description |
[1] The floating ice shelf of Petermann glacier interacts directly with the ocean and is thought to lose at least 80 % of its mass through basal melting. Based on three opportunistic ocean surveys in Petermann Fjord we describe the basic oceanography: the circulation at the fjord mouth, the hydrographic structure beneath the ice shelf, the oceanic heat delivered to the under‐ice cavity, and the fate of the resulting melt water. The 1100 m deep fjord is separated from neighboring Hall Basin by a sill between 350 and 450 m deep. Fjord bottom waters are renewed by episodic spillover at the sill of Atlantic water from the Arctic. Glacial melt water appears on the northeast side of the fjord at depths between 200 m and that of the glacier’s grounding line (about 500 m). The fjord circulation is fundamentally three‐dimensional; satellite imagery and geostrophic calculations suggest a cyclonic gyre within the fjord mouth, with outflow on the northeast side. Tidal flows are similar in magnitude to the geostrophic flow. The oceanic heat flux into the fjord appears more than sufficient to account for the observed rate of basal melting. Cold, low‐salinity water originating in the surface layer of Nares Strait in winter intrudes far under the ice. This may limit basal melting to the inland half of the shelf. The melt rate and long‐term stability of Petermann ice shelf may depend on regional sea ice cover and fjord geometry, in addition to the supply of oceanic heat entering the fjord. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.4582 http://muenchow.cms.udel.edu/papers/Johnson2010JGR.pdf |
long_lat |
ENVELOPE(-62.992,-62.992,81.502,81.502) ENVELOPE(158.167,158.167,-81.450,-81.450) ENVELOPE(-61.500,-61.500,81.167,81.167) |
geographic |
Arctic Hall Basin Nares Petermann Fjord |
geographic_facet |
Arctic Hall Basin Nares Petermann Fjord |
genre |
Arctic Hall Basin Ice Shelf Nares strait Petermann Fjord Petermann glacier Sea ice |
genre_facet |
Arctic Hall Basin Ice Shelf Nares strait Petermann Fjord Petermann glacier Sea ice |
op_source |
http://muenchow.cms.udel.edu/papers/Johnson2010JGR.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.4582 http://muenchow.cms.udel.edu/papers/Johnson2010JGR.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766340687458992128 |