Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica
The catastrophic break-ups of the floating Larsen A and B ice shelves (Antarctica) in 1995 and 2002 and associated acceleration of glaciers that flowed into these ice shelves were among the most dramatic glaciological events observed in historical time. This raises a question about the larger West A...
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2011
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/7545/ https://doi.org/10.1130/G32153.1 |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:7545 2023-05-15T13:46:03+02:00 Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica Jakobsson, M. Anderson, J. B. Nitsche, F.O Dowdeswell, J. A Gyllencreutz, R. Kirchner, N. Mohammad, R O'Regan, Matthew Alley, R B. Anandakrishnan, S. Eriksson, B. Kirshner, A. Fernandez, R. Stolldorf, T. Minzoni, R. Majewski, W. 2011-07 https://orca.cardiff.ac.uk/id/eprint/7545/ https://doi.org/10.1130/G32153.1 unknown Geological Society of America Jakobsson, M., Anderson, J. B., Nitsche, F.O, Dowdeswell, J. A, Gyllencreutz, R., Kirchner, N., Mohammad, R, O'Regan, Matthew, Alley, R B., Anandakrishnan, S., Eriksson, B., Kirshner, A., Fernandez, R., Stolldorf, T., Minzoni, R. and Majewski, W. 2011. Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica. Geology 39 (7) , pp. 691-694. 10.1130/G32153.1 https://doi.org/10.1130/G32153.1 doi:10.1130/G32153.1 QE Geology Article PeerReviewed 2011 ftunivcardiff https://doi.org/10.1130/G32153.1 2022-09-25T20:16:07Z The catastrophic break-ups of the floating Larsen A and B ice shelves (Antarctica) in 1995 and 2002 and associated acceleration of glaciers that flowed into these ice shelves were among the most dramatic glaciological events observed in historical time. This raises a question about the larger West Antarctic ice shelves. Do these shelves, with their much greater glacial discharge, have a history of collapse? Here we describe features from the seafloor in Pine Island Bay, West Antarctica, which we interpret as having been formed during a massive ice shelf break-up and associated grounding line retreat. This evidence exists in the form of seafloor landforms that we argue were produced daily as a consequence of tidally influenced motion of mega-icebergs maintained upright in an iceberg armada produced from the disintegrating ice shelf and retreating grounding line. The break-up occurred prior to ca. 12 ka and was likely a response to rapid sea-level rise or ocean warming at that time. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Iceberg* Pine Island Pine Island Bay West Antarctica Cardiff University: ORCA (Online Research @ Cardiff) Antarctic Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) West Antarctica Geology 39 7 691 694 |
institution |
Open Polar |
collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Jakobsson, M. Anderson, J. B. Nitsche, F.O Dowdeswell, J. A Gyllencreutz, R. Kirchner, N. Mohammad, R O'Regan, Matthew Alley, R B. Anandakrishnan, S. Eriksson, B. Kirshner, A. Fernandez, R. Stolldorf, T. Minzoni, R. Majewski, W. Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica |
topic_facet |
QE Geology |
description |
The catastrophic break-ups of the floating Larsen A and B ice shelves (Antarctica) in 1995 and 2002 and associated acceleration of glaciers that flowed into these ice shelves were among the most dramatic glaciological events observed in historical time. This raises a question about the larger West Antarctic ice shelves. Do these shelves, with their much greater glacial discharge, have a history of collapse? Here we describe features from the seafloor in Pine Island Bay, West Antarctica, which we interpret as having been formed during a massive ice shelf break-up and associated grounding line retreat. This evidence exists in the form of seafloor landforms that we argue were produced daily as a consequence of tidally influenced motion of mega-icebergs maintained upright in an iceberg armada produced from the disintegrating ice shelf and retreating grounding line. The break-up occurred prior to ca. 12 ka and was likely a response to rapid sea-level rise or ocean warming at that time. |
format |
Article in Journal/Newspaper |
author |
Jakobsson, M. Anderson, J. B. Nitsche, F.O Dowdeswell, J. A Gyllencreutz, R. Kirchner, N. Mohammad, R O'Regan, Matthew Alley, R B. Anandakrishnan, S. Eriksson, B. Kirshner, A. Fernandez, R. Stolldorf, T. Minzoni, R. Majewski, W. |
author_facet |
Jakobsson, M. Anderson, J. B. Nitsche, F.O Dowdeswell, J. A Gyllencreutz, R. Kirchner, N. Mohammad, R O'Regan, Matthew Alley, R B. Anandakrishnan, S. Eriksson, B. Kirshner, A. Fernandez, R. Stolldorf, T. Minzoni, R. Majewski, W. |
author_sort |
Jakobsson, M. |
title |
Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica |
title_short |
Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica |
title_full |
Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica |
title_fullStr |
Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica |
title_full_unstemmed |
Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica |
title_sort |
geological record of ice shelf break-up and grounding line retreat, pine island bay, west antarctica |
publisher |
Geological Society of America |
publishDate |
2011 |
url |
https://orca.cardiff.ac.uk/id/eprint/7545/ https://doi.org/10.1130/G32153.1 |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Antarctic Island Bay Pine Island Bay West Antarctica |
geographic_facet |
Antarctic Island Bay Pine Island Bay West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Iceberg* Pine Island Pine Island Bay West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Iceberg* Pine Island Pine Island Bay West Antarctica |
op_relation |
Jakobsson, M., Anderson, J. B., Nitsche, F.O, Dowdeswell, J. A, Gyllencreutz, R., Kirchner, N., Mohammad, R, O'Regan, Matthew, Alley, R B., Anandakrishnan, S., Eriksson, B., Kirshner, A., Fernandez, R., Stolldorf, T., Minzoni, R. and Majewski, W. 2011. Geological record of ice shelf break-up and grounding line retreat, Pine Island Bay, West Antarctica. Geology 39 (7) , pp. 691-694. 10.1130/G32153.1 https://doi.org/10.1130/G32153.1 doi:10.1130/G32153.1 |
op_doi |
https://doi.org/10.1130/G32153.1 |
container_title |
Geology |
container_volume |
39 |
container_issue |
7 |
container_start_page |
691 |
op_container_end_page |
694 |
_version_ |
1766235428713660416 |