Basal terraces on melting ice shelves
Ocean waters melt the margins of Antarctic and Greenland glaciers, and individual glaciers' responses and the integrity of their ice shelves are expected to depend on the spatial distribution of melt. The bases of the ice shelves associated with Pine Island Glacier (West Antarctica) and Peterma...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/508581/ https://nora.nerc.ac.uk/id/eprint/508581/1/grl51949.pdf https://doi.org/10.1002/2014GL060618 |
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ftnerc:oai:nora.nerc.ac.uk:508581 2023-05-15T13:48:08+02:00 Basal terraces on melting ice shelves Dutrieux, Pierre Stewart, Craig Jenkins, Adrian Nicholls, Keith W. Corr, Hugh F J. Rignot, Eric Steffen, Konrad 2014-08-16 text http://nora.nerc.ac.uk/id/eprint/508581/ https://nora.nerc.ac.uk/id/eprint/508581/1/grl51949.pdf https://doi.org/10.1002/2014GL060618 en eng Wiley https://nora.nerc.ac.uk/id/eprint/508581/1/grl51949.pdf Dutrieux, Pierre orcid:0000-0002-8066-934X Stewart, Craig; Jenkins, Adrian orcid:0000-0002-9117-0616 Nicholls, Keith W. orcid:0000-0002-2188-4509 Corr, Hugh F J.; Rignot, Eric; Steffen, Konrad. 2014 Basal terraces on melting ice shelves. Geophysical Research Letters, 41 (15). 5506-5513. https://doi.org/10.1002/2014GL060618 <https://doi.org/10.1002/2014GL060618> Publication - Article PeerReviewed 2014 ftnerc https://doi.org/10.1002/2014GL060618 2023-02-04T19:40:24Z Ocean waters melt the margins of Antarctic and Greenland glaciers, and individual glaciers' responses and the integrity of their ice shelves are expected to depend on the spatial distribution of melt. The bases of the ice shelves associated with Pine Island Glacier (West Antarctica) and Petermann Glacier (Greenland) have similar geometries, including kilometer-wide, hundreds-of-meter high channels oriented along and across the direction of ice flow. The channels are enhanced by, and constrain, oceanic melt. New meter-scale observations of basal topography reveal peculiar glaciated landscapes. Channel flanks are not smooth, but are instead stepped, with hundreds-of-meters-wide flat terraces separated by 5–50 m high walls. Melting is shown to be modulated by the geometry: constant across each terrace, changing from one terrace to the next, and greatly enhanced on the ~45° inclined walls. Melting is therefore fundamentally heterogeneous and likely associated with stratification in the ice-ocean boundary layer, challenging current models of ice shelf-ocean interactions. Article in Journal/Newspaper Antarc* Antarctic Antarctica glacier Greenland Ice Shelf Ice Shelves Petermann glacier Pine Island Pine Island Glacier West Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic West Antarctica Greenland Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Geophysical Research Letters 41 15 5506 5513 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Ocean waters melt the margins of Antarctic and Greenland glaciers, and individual glaciers' responses and the integrity of their ice shelves are expected to depend on the spatial distribution of melt. The bases of the ice shelves associated with Pine Island Glacier (West Antarctica) and Petermann Glacier (Greenland) have similar geometries, including kilometer-wide, hundreds-of-meter high channels oriented along and across the direction of ice flow. The channels are enhanced by, and constrain, oceanic melt. New meter-scale observations of basal topography reveal peculiar glaciated landscapes. Channel flanks are not smooth, but are instead stepped, with hundreds-of-meters-wide flat terraces separated by 5–50 m high walls. Melting is shown to be modulated by the geometry: constant across each terrace, changing from one terrace to the next, and greatly enhanced on the ~45° inclined walls. Melting is therefore fundamentally heterogeneous and likely associated with stratification in the ice-ocean boundary layer, challenging current models of ice shelf-ocean interactions. |
format |
Article in Journal/Newspaper |
author |
Dutrieux, Pierre Stewart, Craig Jenkins, Adrian Nicholls, Keith W. Corr, Hugh F J. Rignot, Eric Steffen, Konrad |
spellingShingle |
Dutrieux, Pierre Stewart, Craig Jenkins, Adrian Nicholls, Keith W. Corr, Hugh F J. Rignot, Eric Steffen, Konrad Basal terraces on melting ice shelves |
author_facet |
Dutrieux, Pierre Stewart, Craig Jenkins, Adrian Nicholls, Keith W. Corr, Hugh F J. Rignot, Eric Steffen, Konrad |
author_sort |
Dutrieux, Pierre |
title |
Basal terraces on melting ice shelves |
title_short |
Basal terraces on melting ice shelves |
title_full |
Basal terraces on melting ice shelves |
title_fullStr |
Basal terraces on melting ice shelves |
title_full_unstemmed |
Basal terraces on melting ice shelves |
title_sort |
basal terraces on melting ice shelves |
publisher |
Wiley |
publishDate |
2014 |
url |
http://nora.nerc.ac.uk/id/eprint/508581/ https://nora.nerc.ac.uk/id/eprint/508581/1/grl51949.pdf https://doi.org/10.1002/2014GL060618 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic West Antarctica Greenland Pine Island Glacier |
geographic_facet |
Antarctic West Antarctica Greenland Pine Island Glacier |
genre |
Antarc* Antarctic Antarctica glacier Greenland Ice Shelf Ice Shelves Petermann glacier Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica glacier Greenland Ice Shelf Ice Shelves Petermann glacier Pine Island Pine Island Glacier West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/508581/1/grl51949.pdf Dutrieux, Pierre orcid:0000-0002-8066-934X Stewart, Craig; Jenkins, Adrian orcid:0000-0002-9117-0616 Nicholls, Keith W. orcid:0000-0002-2188-4509 Corr, Hugh F J.; Rignot, Eric; Steffen, Konrad. 2014 Basal terraces on melting ice shelves. Geophysical Research Letters, 41 (15). 5506-5513. https://doi.org/10.1002/2014GL060618 <https://doi.org/10.1002/2014GL060618> |
op_doi |
https://doi.org/10.1002/2014GL060618 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
15 |
container_start_page |
5506 |
op_container_end_page |
5513 |
_version_ |
1766248777782394880 |