Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica
Ferrero Bay, located in eastern Pine Island Bay (PIB) of the Amundsen Sea Embayment, is one of the largest and southernmost fjords yet studied in Antarctica. High-resolution multibeam swath bathymetric data, chirp sonar sub-bottom profiles, and three Kasten cores were collected in Ferrero Bay during...
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Online Access: | https://hdl.handle.net/1911/95528 https://doi.org/10.1177/0959683617702226 |
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ftriceuniv:oai:scholarship.rice.edu:1911/95528 2023-05-15T13:24:12+02:00 Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica Minzoni, Rebecca Totten Majewski, Wojciech Anderson, John B. Yokoyama, Yusuke Fernandez, Rodrigo Jakobsson, Martin 2017 application/pdf https://hdl.handle.net/1911/95528 https://doi.org/10.1177/0959683617702226 eng eng Sage Minzoni, Rebecca Totten, Majewski, Wojciech, Anderson, John B., et al. "Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica." The Holocene, (2017) Sage: https://doi.org/10.1177/0959683617702226. https://hdl.handle.net/1911/95528 Minzoni_OceanographicInfluencesonCosgroveIceShelf_REVISION https://doi.org/10.1177/0959683617702226 This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Sage. Journal article Text post-print 2017 ftriceuniv https://doi.org/10.1177/0959683617702226 2022-08-09T20:29:38Z Ferrero Bay, located in eastern Pine Island Bay (PIB) of the Amundsen Sea Embayment, is one of the largest and southernmost fjords yet studied in Antarctica. High-resolution multibeam swath bathymetric data, chirp sonar sub-bottom profiles, and three Kasten cores were collected in Ferrero Bay during the IB Oden Southern Ocean 2009–2010 cruise (OSO0910). Core KC-15 from the inner bay yielded two carbonate ages providing a minimum age for ice sheet recession from this sector of PIB by ~11 cal. kyr BP. In total, seven additional acid insoluble organic (AIO) fraction radiocarbon ages provide a linear age model with an R2 of 0.99. Variations in magnetic susceptibility, grain size, total organic carbon (TOC) and nitrogen, diatom abundance, and foraminiferal assemblage and abundance are used to interpret glacial history and paleoceanographic conditions. Grounding line retreat was characterized by advection of planktic foraminifera beneath an ice shelf that may have extended across the middle continental shelf. Following initial deglaciation, the Cosgrove Ice Shelf covered Ferrero Bay, and productivity was virtually absent during the mid-Holocene, while benthic foraminifera indicate periodic incursion of warm Circumpolar Deep Water. The ice shelf persisted until 2.3 cal. kyr BP, when TOC and diatom abundance increased as the bay opened and coastal areas deglaciated. Abundant diatoms demonstrate open marine conditions and seasonal sea ice during the recent open water phase, while high benthic foraminiferal abundance indicates active benthos. The retreat of the Cosgrove Ice Shelf was out of phase with Antarctic Peninsula ice shelves and ice-core proxy temperatures, implying that it did not respond to Holocene climate events but rather to the influence of Circumpolar Deep Water and possibly to internal glacial dynamics. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Cosgrove Ice Shelf ice core Ice Sheet Ice Shelf Ice Shelves Pine Island Pine Island Bay Sea ice Southern Ocean Rice University: Digital Scholarship Archive Amundsen Sea Antarctic Antarctic Peninsula Cosgrove Ice Shelf ENVELOPE(-100.750,-100.750,-73.533,-73.533) Ferrero Bay ENVELOPE(-102.500,-102.500,-72.500,-72.500) Inner Bay ENVELOPE(-37.967,-37.967,-54.017,-54.017) Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Southern Ocean The Holocene 27 11 1645 1658 |
institution |
Open Polar |
collection |
Rice University: Digital Scholarship Archive |
op_collection_id |
ftriceuniv |
language |
English |
description |
Ferrero Bay, located in eastern Pine Island Bay (PIB) of the Amundsen Sea Embayment, is one of the largest and southernmost fjords yet studied in Antarctica. High-resolution multibeam swath bathymetric data, chirp sonar sub-bottom profiles, and three Kasten cores were collected in Ferrero Bay during the IB Oden Southern Ocean 2009–2010 cruise (OSO0910). Core KC-15 from the inner bay yielded two carbonate ages providing a minimum age for ice sheet recession from this sector of PIB by ~11 cal. kyr BP. In total, seven additional acid insoluble organic (AIO) fraction radiocarbon ages provide a linear age model with an R2 of 0.99. Variations in magnetic susceptibility, grain size, total organic carbon (TOC) and nitrogen, diatom abundance, and foraminiferal assemblage and abundance are used to interpret glacial history and paleoceanographic conditions. Grounding line retreat was characterized by advection of planktic foraminifera beneath an ice shelf that may have extended across the middle continental shelf. Following initial deglaciation, the Cosgrove Ice Shelf covered Ferrero Bay, and productivity was virtually absent during the mid-Holocene, while benthic foraminifera indicate periodic incursion of warm Circumpolar Deep Water. The ice shelf persisted until 2.3 cal. kyr BP, when TOC and diatom abundance increased as the bay opened and coastal areas deglaciated. Abundant diatoms demonstrate open marine conditions and seasonal sea ice during the recent open water phase, while high benthic foraminiferal abundance indicates active benthos. The retreat of the Cosgrove Ice Shelf was out of phase with Antarctic Peninsula ice shelves and ice-core proxy temperatures, implying that it did not respond to Holocene climate events but rather to the influence of Circumpolar Deep Water and possibly to internal glacial dynamics. |
format |
Article in Journal/Newspaper |
author |
Minzoni, Rebecca Totten Majewski, Wojciech Anderson, John B. Yokoyama, Yusuke Fernandez, Rodrigo Jakobsson, Martin |
spellingShingle |
Minzoni, Rebecca Totten Majewski, Wojciech Anderson, John B. Yokoyama, Yusuke Fernandez, Rodrigo Jakobsson, Martin Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica |
author_facet |
Minzoni, Rebecca Totten Majewski, Wojciech Anderson, John B. Yokoyama, Yusuke Fernandez, Rodrigo Jakobsson, Martin |
author_sort |
Minzoni, Rebecca Totten |
title |
Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica |
title_short |
Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica |
title_full |
Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica |
title_fullStr |
Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica |
title_full_unstemmed |
Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica |
title_sort |
oceanographic influences on the stability of the cosgrove ice shelf, antarctica |
publisher |
Sage |
publishDate |
2017 |
url |
https://hdl.handle.net/1911/95528 https://doi.org/10.1177/0959683617702226 |
long_lat |
ENVELOPE(-100.750,-100.750,-73.533,-73.533) ENVELOPE(-102.500,-102.500,-72.500,-72.500) ENVELOPE(-37.967,-37.967,-54.017,-54.017) ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Amundsen Sea Antarctic Antarctic Peninsula Cosgrove Ice Shelf Ferrero Bay Inner Bay Island Bay Pine Island Bay Southern Ocean |
geographic_facet |
Amundsen Sea Antarctic Antarctic Peninsula Cosgrove Ice Shelf Ferrero Bay Inner Bay Island Bay Pine Island Bay Southern Ocean |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Cosgrove Ice Shelf ice core Ice Sheet Ice Shelf Ice Shelves Pine Island Pine Island Bay Sea ice Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Cosgrove Ice Shelf ice core Ice Sheet Ice Shelf Ice Shelves Pine Island Pine Island Bay Sea ice Southern Ocean |
op_relation |
Minzoni, Rebecca Totten, Majewski, Wojciech, Anderson, John B., et al. "Oceanographic influences on the stability of the Cosgrove Ice Shelf, Antarctica." The Holocene, (2017) Sage: https://doi.org/10.1177/0959683617702226. https://hdl.handle.net/1911/95528 Minzoni_OceanographicInfluencesonCosgroveIceShelf_REVISION https://doi.org/10.1177/0959683617702226 |
op_rights |
This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Sage. |
op_doi |
https://doi.org/10.1177/0959683617702226 |
container_title |
The Holocene |
container_volume |
27 |
container_issue |
11 |
container_start_page |
1645 |
op_container_end_page |
1658 |
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1766377987648782336 |