Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf
In recent years, mass loss from the Antarctic Ice Sheet has contributed nearly 0.5 mm yr–1 to global mean sea level rise, about one-sixth of the current rate (Church et al., 2011). Around half of that contribution has come from accelerated draining of outlet glaciers into the southeast Amundsen Sea...
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Oceanography Society
2012
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/46006/ https://doi.org/10.5670/oceanog.2012.95 https://nrl.northumbria.ac.uk/id/eprint/46006/1/25-3_jenkins.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:46006 2023-05-15T13:23:57+02:00 Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf Jenkins, Adrian Dutrieux, Pierre Jacobs, Stan McPhail, Steve Perrett, James Webb, Andy White, Dave 2012-09-01 text https://nrl.northumbria.ac.uk/id/eprint/46006/ https://doi.org/10.5670/oceanog.2012.95 https://nrl.northumbria.ac.uk/id/eprint/46006/1/25-3_jenkins.pdf en eng Oceanography Society https://nrl.northumbria.ac.uk/id/eprint/46006/1/25-3_jenkins.pdf Jenkins, Adrian, Dutrieux, Pierre, Jacobs, Stan, McPhail, Steve, Perrett, James, Webb, Andy and White, Dave (2012) Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf. Oceanography, 25 (3). pp. 202-203. ISSN 1042-8275 cc_by_4_0 CC-BY F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2012 ftunivnorthumb https://doi.org/10.5670/oceanog.2012.95 2022-09-25T06:13:44Z In recent years, mass loss from the Antarctic Ice Sheet has contributed nearly 0.5 mm yr–1 to global mean sea level rise, about one-sixth of the current rate (Church et al., 2011). Around half of that contribution has come from accelerated draining of outlet glaciers into the southeast Amundsen Sea (Rignot et al., 2008), where the flow speed of Pine Island Glacier (PIG; Figure 1) in particular has increased by over 70%, to around 4 km yr–1, since the first observations in the early 1970s (Rignot, 2008; Joughin et al., 2010). The accelerations have been accompanied by rapid thinning of the glaciers extending inland from the floating ice shelves that form the glacier termini (Shepherd et al., 2002, 2004). One implication of these observed patterns of change is that the mass loss has probably been driven by changes in the rate of submarine melting of the floating ice shelves. The ubiquitous presence of warm Circumpolar Deep Water (CDW) on the Amundsen Sea continental shelf, at temperatures 3–4°C above the pressure freezing point, was first revealed during a 1994 cruise of RVIB Nathaniel B Palmer (Jacobs et al., 1996). Repeat observations at the Pine Island Ice Front made from the Palmer in 2009 showed that submarine melting of PIG had increased by 50% over the intervening 15 years despite a modest rise in the temperature of CDW of only about 0.1°C (Jacobs et al., 2011). While ice front observations were able to document those changes, the reason for the dramatic increase in submarine melting would have remained speculative while the ocean cavity beneath the approximately 65 x 35 km, fast-flowing, central part of the ice shelf remained a black box. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier Northumbria University, Newcastle: Northumbria Research Link (NRL) Amundsen Sea Antarctic Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) The Antarctic Oceanography 25 3 202 203 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Jenkins, Adrian Dutrieux, Pierre Jacobs, Stan McPhail, Steve Perrett, James Webb, Andy White, Dave Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf |
topic_facet |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
In recent years, mass loss from the Antarctic Ice Sheet has contributed nearly 0.5 mm yr–1 to global mean sea level rise, about one-sixth of the current rate (Church et al., 2011). Around half of that contribution has come from accelerated draining of outlet glaciers into the southeast Amundsen Sea (Rignot et al., 2008), where the flow speed of Pine Island Glacier (PIG; Figure 1) in particular has increased by over 70%, to around 4 km yr–1, since the first observations in the early 1970s (Rignot, 2008; Joughin et al., 2010). The accelerations have been accompanied by rapid thinning of the glaciers extending inland from the floating ice shelves that form the glacier termini (Shepherd et al., 2002, 2004). One implication of these observed patterns of change is that the mass loss has probably been driven by changes in the rate of submarine melting of the floating ice shelves. The ubiquitous presence of warm Circumpolar Deep Water (CDW) on the Amundsen Sea continental shelf, at temperatures 3–4°C above the pressure freezing point, was first revealed during a 1994 cruise of RVIB Nathaniel B Palmer (Jacobs et al., 1996). Repeat observations at the Pine Island Ice Front made from the Palmer in 2009 showed that submarine melting of PIG had increased by 50% over the intervening 15 years despite a modest rise in the temperature of CDW of only about 0.1°C (Jacobs et al., 2011). While ice front observations were able to document those changes, the reason for the dramatic increase in submarine melting would have remained speculative while the ocean cavity beneath the approximately 65 x 35 km, fast-flowing, central part of the ice shelf remained a black box. |
format |
Article in Journal/Newspaper |
author |
Jenkins, Adrian Dutrieux, Pierre Jacobs, Stan McPhail, Steve Perrett, James Webb, Andy White, Dave |
author_facet |
Jenkins, Adrian Dutrieux, Pierre Jacobs, Stan McPhail, Steve Perrett, James Webb, Andy White, Dave |
author_sort |
Jenkins, Adrian |
title |
Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf |
title_short |
Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf |
title_full |
Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf |
title_fullStr |
Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf |
title_full_unstemmed |
Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf |
title_sort |
autonomous underwater vehicle exploration of the ocean cavity beneath an antarctic ice shelf |
publisher |
Oceanography Society |
publishDate |
2012 |
url |
https://nrl.northumbria.ac.uk/id/eprint/46006/ https://doi.org/10.5670/oceanog.2012.95 https://nrl.northumbria.ac.uk/id/eprint/46006/1/25-3_jenkins.pdf |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Amundsen Sea Antarctic Pine Island Glacier The Antarctic |
geographic_facet |
Amundsen Sea Antarctic Pine Island Glacier The Antarctic |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/46006/1/25-3_jenkins.pdf Jenkins, Adrian, Dutrieux, Pierre, Jacobs, Stan, McPhail, Steve, Perrett, James, Webb, Andy and White, Dave (2012) Autonomous Underwater Vehicle Exploration of the Ocean Cavity Beneath an Antarctic Ice Shelf. Oceanography, 25 (3). pp. 202-203. ISSN 1042-8275 |
op_rights |
cc_by_4_0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5670/oceanog.2012.95 |
container_title |
Oceanography |
container_volume |
25 |
container_issue |
3 |
container_start_page |
202 |
op_container_end_page |
203 |
_version_ |
1766376511954223104 |