An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula
In recent decades, rapid ice-shelf disintegration along the Antarctic Peninsula has had a global impact through enhancing outlet glacier flow, and hence sea level rise, and the freshening of Antarctic Bottom Water. Ice shelf thinning due to basal melting results from the circulation of relatively wa...
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European Geosciences Union
2020
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Online Access: | http://nora.nerc.ac.uk/id/eprint/525587/ https://nora.nerc.ac.uk/id/eprint/525587/1/essd-12-887-2020.pdf https://www.earth-syst-sci-data.net/12/887/2020/ |
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ftnerc:oai:nora.nerc.ac.uk:525587 2023-05-15T13:41:44+02:00 An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula Brisbourne, Alex Kulessa, Bernd Hudson, Thomas Harrison, Lianne Holland, Paul Luckman, Adrian Bevan, Suzanne Ashmore, David Hubbard, Bryn Pearce, Emma White, James Booth, Adam Nicholls, Keith Smith, Andrew 2020-04-20 text http://nora.nerc.ac.uk/id/eprint/525587/ https://nora.nerc.ac.uk/id/eprint/525587/1/essd-12-887-2020.pdf https://www.earth-syst-sci-data.net/12/887/2020/ en eng European Geosciences Union https://nora.nerc.ac.uk/id/eprint/525587/1/essd-12-887-2020.pdf Brisbourne, Alex orcid:0000-0002-9887-7120 Kulessa, Bernd; Hudson, Thomas orcid:0000-0003-2944-883X Harrison, Lianne orcid:0000-0002-7329-4674 Holland, Paul orcid:0000-0001-8370-289X Luckman, Adrian; Bevan, Suzanne; Ashmore, David; Hubbard, Bryn; Pearce, Emma; White, James; Booth, Adam; Nicholls, Keith orcid:0000-0002-2188-4509 Smith, Andrew orcid:0000-0001-8577-482X . 2020 An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula. Earth System Science Data, 12. 887-896. https://doi.org/10.5194/essd-12-887-2020 <https://doi.org/10.5194/essd-12-887-2020> cc_by_4 CC-BY Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.5194/essd-12-887-2020 2023-02-04T19:49:28Z In recent decades, rapid ice-shelf disintegration along the Antarctic Peninsula has had a global impact through enhancing outlet glacier flow, and hence sea level rise, and the freshening of Antarctic Bottom Water. Ice shelf thinning due to basal melting results from the circulation of relatively warm water in the underlying ocean cavity. However, the effect of sub-shelf circulation on future ice-shelf stability cannot be predicted accurately with computer simulations if the geometry of the ice-shelf cavity is unknown. To address this deficit for Larsen C Ice Shelf, west Antarctica, we integrate new water-column thickness measurements with existing observations. We present these new data here along with an updated bathymetry grid of the ocean cavity. Key findings include relatively deep seabed to the south-east of the Kenyon Peninsula, along the grounding line and around the key ice shelf pinning point of Bawden Ice Rise. In addition, we can confirm that the cavity’s southern trough stretches from Mobiloil Inlet to the open ocean. These areas of deep seabed will influence ocean circulation and tidal mixing, and will therefore affect the basal-melt distribution. These results will help constrain models of ice-shelf cavity circulation with the aim of improving our understanding of sub-shelf processes and their potential influence on ice shelf stability. The data set comprises all point measurements of seabed depth and a gridded data product, derived using additional measurements of both offshore seabed depth and the thickness of grounded ice. We present all new depth measurements here as well as a compilation of previously published measurements used in the gridding process. The gridded data product is included in the supplementary material. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf West Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula West Antarctica Kenyon ENVELOPE(-174.867,-174.867,-85.167,-85.167) Bawden Ice Rise ENVELOPE(-60.155,-60.155,-66.858,-66.858) Kenyon peninsula ENVELOPE(-63.550,-63.550,-68.450,-68.450) Mobiloil ENVELOPE(-64.500,-64.500,-68.583,-68.583) Mobiloil Inlet ENVELOPE(-65.000,-65.000,-68.500,-68.500) Earth System Science Data 12 2 887 896 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
In recent decades, rapid ice-shelf disintegration along the Antarctic Peninsula has had a global impact through enhancing outlet glacier flow, and hence sea level rise, and the freshening of Antarctic Bottom Water. Ice shelf thinning due to basal melting results from the circulation of relatively warm water in the underlying ocean cavity. However, the effect of sub-shelf circulation on future ice-shelf stability cannot be predicted accurately with computer simulations if the geometry of the ice-shelf cavity is unknown. To address this deficit for Larsen C Ice Shelf, west Antarctica, we integrate new water-column thickness measurements with existing observations. We present these new data here along with an updated bathymetry grid of the ocean cavity. Key findings include relatively deep seabed to the south-east of the Kenyon Peninsula, along the grounding line and around the key ice shelf pinning point of Bawden Ice Rise. In addition, we can confirm that the cavity’s southern trough stretches from Mobiloil Inlet to the open ocean. These areas of deep seabed will influence ocean circulation and tidal mixing, and will therefore affect the basal-melt distribution. These results will help constrain models of ice-shelf cavity circulation with the aim of improving our understanding of sub-shelf processes and their potential influence on ice shelf stability. The data set comprises all point measurements of seabed depth and a gridded data product, derived using additional measurements of both offshore seabed depth and the thickness of grounded ice. We present all new depth measurements here as well as a compilation of previously published measurements used in the gridding process. The gridded data product is included in the supplementary material. |
format |
Article in Journal/Newspaper |
author |
Brisbourne, Alex Kulessa, Bernd Hudson, Thomas Harrison, Lianne Holland, Paul Luckman, Adrian Bevan, Suzanne Ashmore, David Hubbard, Bryn Pearce, Emma White, James Booth, Adam Nicholls, Keith Smith, Andrew |
spellingShingle |
Brisbourne, Alex Kulessa, Bernd Hudson, Thomas Harrison, Lianne Holland, Paul Luckman, Adrian Bevan, Suzanne Ashmore, David Hubbard, Bryn Pearce, Emma White, James Booth, Adam Nicholls, Keith Smith, Andrew An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula |
author_facet |
Brisbourne, Alex Kulessa, Bernd Hudson, Thomas Harrison, Lianne Holland, Paul Luckman, Adrian Bevan, Suzanne Ashmore, David Hubbard, Bryn Pearce, Emma White, James Booth, Adam Nicholls, Keith Smith, Andrew |
author_sort |
Brisbourne, Alex |
title |
An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula |
title_short |
An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula |
title_full |
An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula |
title_fullStr |
An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula |
title_full_unstemmed |
An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula |
title_sort |
updated seabed bathymetry beneath larsen c ice shelf, antarctic peninsula |
publisher |
European Geosciences Union |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/525587/ https://nora.nerc.ac.uk/id/eprint/525587/1/essd-12-887-2020.pdf https://www.earth-syst-sci-data.net/12/887/2020/ |
long_lat |
ENVELOPE(-174.867,-174.867,-85.167,-85.167) ENVELOPE(-60.155,-60.155,-66.858,-66.858) ENVELOPE(-63.550,-63.550,-68.450,-68.450) ENVELOPE(-64.500,-64.500,-68.583,-68.583) ENVELOPE(-65.000,-65.000,-68.500,-68.500) |
geographic |
Antarctic The Antarctic Antarctic Peninsula West Antarctica Kenyon Bawden Ice Rise Kenyon peninsula Mobiloil Mobiloil Inlet |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula West Antarctica Kenyon Bawden Ice Rise Kenyon peninsula Mobiloil Mobiloil Inlet |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/525587/1/essd-12-887-2020.pdf Brisbourne, Alex orcid:0000-0002-9887-7120 Kulessa, Bernd; Hudson, Thomas orcid:0000-0003-2944-883X Harrison, Lianne orcid:0000-0002-7329-4674 Holland, Paul orcid:0000-0001-8370-289X Luckman, Adrian; Bevan, Suzanne; Ashmore, David; Hubbard, Bryn; Pearce, Emma; White, James; Booth, Adam; Nicholls, Keith orcid:0000-0002-2188-4509 Smith, Andrew orcid:0000-0001-8577-482X . 2020 An updated seabed bathymetry beneath Larsen C Ice Shelf, Antarctic Peninsula. Earth System Science Data, 12. 887-896. https://doi.org/10.5194/essd-12-887-2020 <https://doi.org/10.5194/essd-12-887-2020> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/essd-12-887-2020 |
container_title |
Earth System Science Data |
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12 |
container_issue |
2 |
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1766156104493957120 |