An Improved Bathymetry Compilation for the Bellingshausen Sea, Antarctica, to Inform Ice-sheet and Ocean Models
The southern Bellingshausen Sea (SBS) is a rapidly-changing part of West Antarctica, where oceanic and atmospheric warming has led to the recent basal melting and break-up of the Wilkins ice shelf, the dynamic thinning of fringing glaciers, and sea-ice reduction. Accurate sea-floor morphology is vit...
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ftunisfloridatam:oai:digitalcommons.usf.edu:msc_facpub-2569 2023-05-15T14:04:11+02:00 An Improved Bathymetry Compilation for the Bellingshausen Sea, Antarctica, to Inform Ice-sheet and Ocean Models Graham, A. G. C. Nitsche, F. O. Larter, R. D. 2011-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/1542 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2569&context=msc_facpub unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/1542 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2569&context=msc_facpub http://creativecommons.org/licenses/by/3.0/ CC-BY Marine Science Faculty Publications Life Sciences article 2011 ftunisfloridatam 2022-01-20T18:40:25Z The southern Bellingshausen Sea (SBS) is a rapidly-changing part of West Antarctica, where oceanic and atmospheric warming has led to the recent basal melting and break-up of the Wilkins ice shelf, the dynamic thinning of fringing glaciers, and sea-ice reduction. Accurate sea-floor morphology is vital for understanding the continued effects of each process upon changes within Antarctica's ice sheets. Here we present a new bathymetric grid for the SBS compiled from shipborne multibeam echo-sounder, spot-sounding and sub-ice measurements. The 1-km grid is the most detailed compilation for the SBS to-date, revealing large cross-shelf troughs, shallow banks, and deep inner-shelf basins that continue inland of coastal ice shelves. The troughs now serve as pathways which allow warm deep water to access the ice sheet in the SBS. Our dataset highlights areas still lacking bathymetric constraint, as well as regions for further investigation, including the likely routes of palaeo-ice streams. The new compilation is a major improvement upon previous grids and will be a key dataset for incorporating into simulations of ocean circulation, ice-sheet change and history. It will also serve forecasts of ice stability and future sea-level contributions from ice loss in West Antarctica, required for the next IPCC assessment report in 2013. Article in Journal/Newspaper Antarc* Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Ice Shelves Sea ice West Antarctica Wilkins Ice Shelf Digital Commons University of South Florida (USF) West Antarctica Bellingshausen Sea Wilkins ENVELOPE(59.326,59.326,-67.248,-67.248) Wilkins Ice Shelf ENVELOPE(-72.500,-72.500,-70.416,-70.416) |
institution |
Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
language |
unknown |
topic |
Life Sciences |
spellingShingle |
Life Sciences Graham, A. G. C. Nitsche, F. O. Larter, R. D. An Improved Bathymetry Compilation for the Bellingshausen Sea, Antarctica, to Inform Ice-sheet and Ocean Models |
topic_facet |
Life Sciences |
description |
The southern Bellingshausen Sea (SBS) is a rapidly-changing part of West Antarctica, where oceanic and atmospheric warming has led to the recent basal melting and break-up of the Wilkins ice shelf, the dynamic thinning of fringing glaciers, and sea-ice reduction. Accurate sea-floor morphology is vital for understanding the continued effects of each process upon changes within Antarctica's ice sheets. Here we present a new bathymetric grid for the SBS compiled from shipborne multibeam echo-sounder, spot-sounding and sub-ice measurements. The 1-km grid is the most detailed compilation for the SBS to-date, revealing large cross-shelf troughs, shallow banks, and deep inner-shelf basins that continue inland of coastal ice shelves. The troughs now serve as pathways which allow warm deep water to access the ice sheet in the SBS. Our dataset highlights areas still lacking bathymetric constraint, as well as regions for further investigation, including the likely routes of palaeo-ice streams. The new compilation is a major improvement upon previous grids and will be a key dataset for incorporating into simulations of ocean circulation, ice-sheet change and history. It will also serve forecasts of ice stability and future sea-level contributions from ice loss in West Antarctica, required for the next IPCC assessment report in 2013. |
format |
Article in Journal/Newspaper |
author |
Graham, A. G. C. Nitsche, F. O. Larter, R. D. |
author_facet |
Graham, A. G. C. Nitsche, F. O. Larter, R. D. |
author_sort |
Graham, A. G. C. |
title |
An Improved Bathymetry Compilation for the Bellingshausen Sea, Antarctica, to Inform Ice-sheet and Ocean Models |
title_short |
An Improved Bathymetry Compilation for the Bellingshausen Sea, Antarctica, to Inform Ice-sheet and Ocean Models |
title_full |
An Improved Bathymetry Compilation for the Bellingshausen Sea, Antarctica, to Inform Ice-sheet and Ocean Models |
title_fullStr |
An Improved Bathymetry Compilation for the Bellingshausen Sea, Antarctica, to Inform Ice-sheet and Ocean Models |
title_full_unstemmed |
An Improved Bathymetry Compilation for the Bellingshausen Sea, Antarctica, to Inform Ice-sheet and Ocean Models |
title_sort |
improved bathymetry compilation for the bellingshausen sea, antarctica, to inform ice-sheet and ocean models |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2011 |
url |
https://digitalcommons.usf.edu/msc_facpub/1542 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2569&context=msc_facpub |
long_lat |
ENVELOPE(59.326,59.326,-67.248,-67.248) ENVELOPE(-72.500,-72.500,-70.416,-70.416) |
geographic |
West Antarctica Bellingshausen Sea Wilkins Wilkins Ice Shelf |
geographic_facet |
West Antarctica Bellingshausen Sea Wilkins Wilkins Ice Shelf |
genre |
Antarc* Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Ice Shelves Sea ice West Antarctica Wilkins Ice Shelf |
genre_facet |
Antarc* Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Ice Shelves Sea ice West Antarctica Wilkins Ice Shelf |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/1542 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2569&context=msc_facpub |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766275209204072448 |