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 submeter 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 ar...
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American Association for the Advancement of Science (AAAS)
2020
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ftunivcam:oai:www.repository.cam.ac.uk:1810/306113 2024-06-23T07:47:42+00:00 Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year. Dowdeswell, JA Batchelor, CL Montelli, A Ottesen, D Christie, FDW Dowdeswell, EK Evans, J 2020-05-29 Print application/pdf https://www.repository.cam.ac.uk/handle/1810/306113 https://doi.org/10.17863/CAM.53192 eng eng American Association for the Advancement of Science (AAAS) http://dx.doi.org/10.1126/science.aaz3059 Science https://www.repository.cam.ac.uk/handle/1810/306113 doi:10.17863/CAM.53192 All rights reserved 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action Article 2020 ftunivcam https://doi.org/10.17863/CAM.53192 2024-05-29T00:21:11Z A suite of grounding-line landforms on the Antarctic seafloor, imaged at submeter 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 meters high and spaced 20 to 25 meters apart. We interpret these ridges as the product of squeezing up of soft sediment during the rise and fall of the retreating ice sheet grounding line during successive tidal cycles. Grounding-line retreat rates of 40 to 50 meters per day (>10 kilometers per year) are inferred during regional deglaciation of the Larsen shelf. If repeated today, such rapid mass loss to the ocean would have clear implications for increasing the rate of global sea level rise. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Weddell Sea Apollo - University of Cambridge Repository Antarctic The Antarctic Weddell Sea Weddell |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action Dowdeswell, JA Batchelor, CL Montelli, A Ottesen, D Christie, FDW Dowdeswell, EK Evans, J Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year. |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
description |
A suite of grounding-line landforms on the Antarctic seafloor, imaged at submeter 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 meters high and spaced 20 to 25 meters apart. We interpret these ridges as the product of squeezing up of soft sediment during the rise and fall of the retreating ice sheet grounding line during successive tidal cycles. Grounding-line retreat rates of 40 to 50 meters per day (>10 kilometers per year) are inferred during regional deglaciation of the Larsen shelf. If repeated today, such rapid mass loss to the ocean would have clear implications for increasing the rate of global sea level rise. |
format |
Article in Journal/Newspaper |
author |
Dowdeswell, JA Batchelor, CL Montelli, A Ottesen, D Christie, FDW Dowdeswell, EK Evans, J |
author_facet |
Dowdeswell, JA Batchelor, CL Montelli, A Ottesen, D Christie, FDW Dowdeswell, EK Evans, J |
author_sort |
Dowdeswell, JA |
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. |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2020 |
url |
https://www.repository.cam.ac.uk/handle/1810/306113 https://doi.org/10.17863/CAM.53192 |
geographic |
Antarctic The Antarctic Weddell Sea Weddell |
geographic_facet |
Antarctic The Antarctic Weddell Sea Weddell |
genre |
Antarc* Antarctic Ice Sheet Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Weddell Sea |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/306113 doi:10.17863/CAM.53192 |
op_rights |
All rights reserved |
op_doi |
https://doi.org/10.17863/CAM.53192 |
_version_ |
1802651846814203904 |