Diverse landscapes beneath Pine Island Glacier influence ice flow
The retreating Pine Island Glacier (PIG), West Antarctica, presently contributes ~5–10% of global sea-level rise. PIG’s retreat rate has increased in recent decades with associated thinning migrating upstream into tributaries feeding the main glacier trunk. To project future change requires modellin...
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:34453 2023-05-15T13:56:54+02:00 Diverse landscapes beneath Pine Island Glacier influence ice flow Bingham, Robert Vaughan, David King, Edward Davies, Damon Cornford, Stephen Smith, Andrew Arthern, Robert Brisbourne, Alex de Rydt, Jan Graham, Alastair Spagnolo, Matteo Marsh, Oliver Shean, David 2017-12-01 text https://nrl.northumbria.ac.uk/id/eprint/34453/ https://doi.org/10.1038/s41467-017-01597-y https://nrl.northumbria.ac.uk/id/eprint/34453/1/Diverse%20landscapes.pdf en eng Nature Publishing https://nrl.northumbria.ac.uk/id/eprint/34453/1/Diverse%20landscapes.pdf Bingham, Robert, Vaughan, David, King, Edward, Davies, Damon, Cornford, Stephen, Smith, Andrew, Arthern, Robert, Brisbourne, Alex, de Rydt, Jan, Graham, Alastair, Spagnolo, Matteo, Marsh, Oliver and Shean, David (2017) Diverse landscapes beneath Pine Island Glacier influence ice flow. Nature Communications, 8 (1). p. 1618. ISSN 2041-1723 cc_by_4_0 CC-BY F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2017 ftunivnorthumb https://doi.org/10.1038/s41467-017-01597-y 2022-09-25T06:07:21Z The retreating Pine Island Glacier (PIG), West Antarctica, presently contributes ~5–10% of global sea-level rise. PIG’s retreat rate has increased in recent decades with associated thinning migrating upstream into tributaries feeding the main glacier trunk. To project future change requires modelling that includes robust parameterisation of basal traction, the resistance to ice flow at the bed. However, most ice-sheet models estimate basal traction from satellite-derived surface velocity, without a priori knowledge of the key processes from which it is derived, namely friction at the ice-bed interface and form drag, and the resistance to ice flow that arises as ice deforms to negotiate bed topography. Here, we present high-resolution maps, acquired using ice-penetrating radar, of the bed topography across parts of PIG. Contrary to lower-resolution data currently used for ice-sheet models, these data show a contrasting topography across the ice-bed interface. We show that these diverse subglacial landscapes have an impact on ice flow, and present a challenge for modelling ice-sheet evolution and projecting global sea-level rise from ice-sheet loss. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica Northumbria University, Newcastle: Northumbria Research Link (NRL) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) West Antarctica Nature Communications 8 1 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Bingham, Robert Vaughan, David King, Edward Davies, Damon Cornford, Stephen Smith, Andrew Arthern, Robert Brisbourne, Alex de Rydt, Jan Graham, Alastair Spagnolo, Matteo Marsh, Oliver Shean, David Diverse landscapes beneath Pine Island Glacier influence ice flow |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
The retreating Pine Island Glacier (PIG), West Antarctica, presently contributes ~5–10% of global sea-level rise. PIG’s retreat rate has increased in recent decades with associated thinning migrating upstream into tributaries feeding the main glacier trunk. To project future change requires modelling that includes robust parameterisation of basal traction, the resistance to ice flow at the bed. However, most ice-sheet models estimate basal traction from satellite-derived surface velocity, without a priori knowledge of the key processes from which it is derived, namely friction at the ice-bed interface and form drag, and the resistance to ice flow that arises as ice deforms to negotiate bed topography. Here, we present high-resolution maps, acquired using ice-penetrating radar, of the bed topography across parts of PIG. Contrary to lower-resolution data currently used for ice-sheet models, these data show a contrasting topography across the ice-bed interface. We show that these diverse subglacial landscapes have an impact on ice flow, and present a challenge for modelling ice-sheet evolution and projecting global sea-level rise from ice-sheet loss. |
format |
Article in Journal/Newspaper |
author |
Bingham, Robert Vaughan, David King, Edward Davies, Damon Cornford, Stephen Smith, Andrew Arthern, Robert Brisbourne, Alex de Rydt, Jan Graham, Alastair Spagnolo, Matteo Marsh, Oliver Shean, David |
author_facet |
Bingham, Robert Vaughan, David King, Edward Davies, Damon Cornford, Stephen Smith, Andrew Arthern, Robert Brisbourne, Alex de Rydt, Jan Graham, Alastair Spagnolo, Matteo Marsh, Oliver Shean, David |
author_sort |
Bingham, Robert |
title |
Diverse landscapes beneath Pine Island Glacier influence ice flow |
title_short |
Diverse landscapes beneath Pine Island Glacier influence ice flow |
title_full |
Diverse landscapes beneath Pine Island Glacier influence ice flow |
title_fullStr |
Diverse landscapes beneath Pine Island Glacier influence ice flow |
title_full_unstemmed |
Diverse landscapes beneath Pine Island Glacier influence ice flow |
title_sort |
diverse landscapes beneath pine island glacier influence ice flow |
publisher |
Nature Publishing |
publishDate |
2017 |
url |
https://nrl.northumbria.ac.uk/id/eprint/34453/ https://doi.org/10.1038/s41467-017-01597-y https://nrl.northumbria.ac.uk/id/eprint/34453/1/Diverse%20landscapes.pdf |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Pine Island Glacier West Antarctica |
geographic_facet |
Pine Island Glacier West Antarctica |
genre |
Antarc* Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Pine Island Pine Island Glacier West Antarctica |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/34453/1/Diverse%20landscapes.pdf Bingham, Robert, Vaughan, David, King, Edward, Davies, Damon, Cornford, Stephen, Smith, Andrew, Arthern, Robert, Brisbourne, Alex, de Rydt, Jan, Graham, Alastair, Spagnolo, Matteo, Marsh, Oliver and Shean, David (2017) Diverse landscapes beneath Pine Island Glacier influence ice flow. Nature Communications, 8 (1). p. 1618. ISSN 2041-1723 |
op_rights |
cc_by_4_0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-017-01597-y |
container_title |
Nature Communications |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766264492242501632 |