Iceberg discharges of the last glacial period driven by oceanic circulation changes
Proxy data reveal the existence of episodes of increased deposition of ice-rafted detritus in the North Atlantic Ocean during the last glacial period interpreted as massive iceberg discharges from the Laurentide Ice Sheet. Although these have long been attributed to self-sustained ice sheet oscillat...
Published in: | Proceedings of the National Academy of Sciences |
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National Academy of Sciences
2013
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Online Access: | https://eprints.ucm.es/id/eprint/55715/ https://eprints.ucm.es/id/eprint/55715/1/alvarezsolas07.pdf https://doi.org/10.1073/pnas.1306622110 |
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ftunivcmadrid:oai:www.ucm.es:55715 2023-05-15T16:40:09+02:00 Iceberg discharges of the last glacial period driven by oceanic circulation changes Álvarez Solas, Jorge Robinson, Alexander James Montoya Redondo, María Luisa Ritz, Catherine 2013-10-08 application/pdf https://eprints.ucm.es/id/eprint/55715/ https://eprints.ucm.es/id/eprint/55715/1/alvarezsolas07.pdf https://doi.org/10.1073/pnas.1306622110 en eng National Academy of Sciences https://eprints.ucm.es/id/eprint/55715/1/alvarezsolas07.pdf info:eu-repo/semantics/openAccess Física atmosférica info:eu-repo/semantics/article PeerReviewed 2013 ftunivcmadrid https://doi.org/10.1073/pnas.1306622110 2022-05-12T20:09:58Z Proxy data reveal the existence of episodes of increased deposition of ice-rafted detritus in the North Atlantic Ocean during the last glacial period interpreted as massive iceberg discharges from the Laurentide Ice Sheet. Although these have long been attributed to self-sustained ice sheet oscillations, growing evidence of the crucial role that the ocean plays both for past and future behavior of the cryosphere suggests a climatic control of these ice surges. Here, we present simulations of the last glacial period carried out with a hybrid ice sheet–ice shelf model forced by an oceanic warming index derived from proxy data that accounts for the impact of past ocean circulation changes on ocean temperatures. The model generates a time series of iceberg discharge that closely agrees with ice-rafted debris records over the past 80 ka, indicating that oceanic circulation variations were responsible for the enigmatic ice purges of the last ice age. Article in Journal/Newspaper Ice Sheet Ice Shelf North Atlantic Universidad Complutense de Madrid (UCM): E-Prints Complutense Proceedings of the National Academy of Sciences 110 41 16350 16354 |
institution |
Open Polar |
collection |
Universidad Complutense de Madrid (UCM): E-Prints Complutense |
op_collection_id |
ftunivcmadrid |
language |
English |
topic |
Física atmosférica |
spellingShingle |
Física atmosférica Álvarez Solas, Jorge Robinson, Alexander James Montoya Redondo, María Luisa Ritz, Catherine Iceberg discharges of the last glacial period driven by oceanic circulation changes |
topic_facet |
Física atmosférica |
description |
Proxy data reveal the existence of episodes of increased deposition of ice-rafted detritus in the North Atlantic Ocean during the last glacial period interpreted as massive iceberg discharges from the Laurentide Ice Sheet. Although these have long been attributed to self-sustained ice sheet oscillations, growing evidence of the crucial role that the ocean plays both for past and future behavior of the cryosphere suggests a climatic control of these ice surges. Here, we present simulations of the last glacial period carried out with a hybrid ice sheet–ice shelf model forced by an oceanic warming index derived from proxy data that accounts for the impact of past ocean circulation changes on ocean temperatures. The model generates a time series of iceberg discharge that closely agrees with ice-rafted debris records over the past 80 ka, indicating that oceanic circulation variations were responsible for the enigmatic ice purges of the last ice age. |
format |
Article in Journal/Newspaper |
author |
Álvarez Solas, Jorge Robinson, Alexander James Montoya Redondo, María Luisa Ritz, Catherine |
author_facet |
Álvarez Solas, Jorge Robinson, Alexander James Montoya Redondo, María Luisa Ritz, Catherine |
author_sort |
Álvarez Solas, Jorge |
title |
Iceberg discharges of the last glacial period driven by oceanic circulation changes |
title_short |
Iceberg discharges of the last glacial period driven by oceanic circulation changes |
title_full |
Iceberg discharges of the last glacial period driven by oceanic circulation changes |
title_fullStr |
Iceberg discharges of the last glacial period driven by oceanic circulation changes |
title_full_unstemmed |
Iceberg discharges of the last glacial period driven by oceanic circulation changes |
title_sort |
iceberg discharges of the last glacial period driven by oceanic circulation changes |
publisher |
National Academy of Sciences |
publishDate |
2013 |
url |
https://eprints.ucm.es/id/eprint/55715/ https://eprints.ucm.es/id/eprint/55715/1/alvarezsolas07.pdf https://doi.org/10.1073/pnas.1306622110 |
genre |
Ice Sheet Ice Shelf North Atlantic |
genre_facet |
Ice Sheet Ice Shelf North Atlantic |
op_relation |
https://eprints.ucm.es/id/eprint/55715/1/alvarezsolas07.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1073/pnas.1306622110 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
110 |
container_issue |
41 |
container_start_page |
16350 |
op_container_end_page |
16354 |
_version_ |
1766030534196068352 |