Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year
A suite of grounding-line landforms on the Antarctic seafloor, imaged at unprecedented sub-meter horizontal resolution from an autonomous underwater vehicle, enables calculation of ice-sheet retreat rates from a complex of grounding-zone wedges on the Larsen continental shelf, western Weddell Sea. T...
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ftloughboroughun:oai:figshare.com:article/12155595 2023-05-15T13:48:49+02:00 Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year JA Dowdeswell CL Batchelor A Montelli D Ottesen FDW Christie EK Dowdeswell Jeffrey Evans 2020-05-29T00:00:00Z https://figshare.com/articles/journal_contribution/Delicate_seafloor_landforms_reveal_past_Antarctic_grounding-line_retreat_of_kilometers_per_year/12155595 unknown 2134/12155595.v1 https://figshare.com/articles/journal_contribution/Delicate_seafloor_landforms_reveal_past_Antarctic_grounding-line_retreat_of_kilometers_per_year/12155595 All Rights Reserved Uncategorized General Science & Technology Text Journal contribution 2020 ftloughboroughun 2022-01-01T19:21:06Z A suite of grounding-line landforms on the Antarctic seafloor, imaged at unprecedented sub-meter horizontal resolution from an autonomous underwater vehicle, enables calculation of ice-sheet retreat rates from a complex of grounding-zone wedges on the Larsen continental shelf, western Weddell Sea. The landforms are delicate sets of up to 90 ridges, <1.5 m high and spaced 20-25 m apart. We interpret these ridges as the product of squeezing up of soft sediment during the rise and fall of the ice-shelf grounding line during successive tidal cycles. Each ridge is preserved as the grounding line retreats. Grounding-line retreat rates of 40-50 m/day (>10 km/yr) are inferred during regional deglaciation of the Larsen shelf after the Last Glacial Maximum. If repeated today, such rapid mass loss to the ocean would have clear implications for increasing the rate of global sea-level rise. Other Non-Article Part of Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Weddell Sea Loughborough University: Figshare Antarctic The Antarctic Weddell Weddell Sea |
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Open Polar |
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Loughborough University: Figshare |
op_collection_id |
ftloughboroughun |
language |
unknown |
topic |
Uncategorized General Science & Technology |
spellingShingle |
Uncategorized General Science & Technology JA Dowdeswell CL Batchelor A Montelli D Ottesen FDW Christie EK Dowdeswell Jeffrey Evans Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year |
topic_facet |
Uncategorized General Science & Technology |
description |
A suite of grounding-line landforms on the Antarctic seafloor, imaged at unprecedented sub-meter horizontal resolution from an autonomous underwater vehicle, enables calculation of ice-sheet retreat rates from a complex of grounding-zone wedges on the Larsen continental shelf, western Weddell Sea. The landforms are delicate sets of up to 90 ridges, <1.5 m high and spaced 20-25 m apart. We interpret these ridges as the product of squeezing up of soft sediment during the rise and fall of the ice-shelf grounding line during successive tidal cycles. Each ridge is preserved as the grounding line retreats. Grounding-line retreat rates of 40-50 m/day (>10 km/yr) are inferred during regional deglaciation of the Larsen shelf after the Last Glacial Maximum. If repeated today, such rapid mass loss to the ocean would have clear implications for increasing the rate of global sea-level rise. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
JA Dowdeswell CL Batchelor A Montelli D Ottesen FDW Christie EK Dowdeswell Jeffrey Evans |
author_facet |
JA Dowdeswell CL Batchelor A Montelli D Ottesen FDW Christie EK Dowdeswell Jeffrey Evans |
author_sort |
JA Dowdeswell |
title |
Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year |
title_short |
Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year |
title_full |
Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year |
title_fullStr |
Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year |
title_full_unstemmed |
Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year |
title_sort |
delicate seafloor landforms reveal past antarctic grounding-line retreat of kilometers per year |
publishDate |
2020 |
url |
https://figshare.com/articles/journal_contribution/Delicate_seafloor_landforms_reveal_past_Antarctic_grounding-line_retreat_of_kilometers_per_year/12155595 |
geographic |
Antarctic The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Weddell Sea |
op_relation |
2134/12155595.v1 https://figshare.com/articles/journal_contribution/Delicate_seafloor_landforms_reveal_past_Antarctic_grounding-line_retreat_of_kilometers_per_year/12155595 |
op_rights |
All Rights Reserved |
_version_ |
1766249819769143296 |