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...
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Online Access: | http://hdl.handle.net/10261/83135 https://doi.org/10.1073/pnas.1306622110 |
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ftcsic:oai:digital.csic.es:10261/83135 2024-02-11T10:04:50+01:00 Iceberg discharges of the last glacial period driven by oceanic circulation changes Álvarez-Solas, J. Robinson, Alexander Montoya, Marisa Ritz, Catherine 2013-09-23 http://hdl.handle.net/10261/83135 https://doi.org/10.1073/pnas.1306622110 en eng National Academy of Sciences (U.S.) http://www.pnas.org/cgi/doi/10.1073/pnas.1306622110 Álvarez-Solas, J., Robinson, A., Montoya, M., & Ritz, C. (2013). Iceberg discharges of the last glacial period driven by oceanic circulation changes. Proceedings of the National Academy of Sciences. doi:10.1073/pnas.1306622110 http://hdl.handle.net/10261/83135 doi:10.1073/pnas.1306622110 1091-6490 24062437 open Glacial climate variability Climate modeling Abrupt changes artículo http://purl.org/coar/resource_type/c_6501 2013 ftcsic https://doi.org/10.1073/pnas.1306622110 2024-01-16T09:52:30Z 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. Peer reviewed Article in Journal/Newspaper Ice Sheet Ice Shelf North Atlantic Digital.CSIC (Spanish National Research Council) Proceedings of the National Academy of Sciences 110 41 16350 16354 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Glacial climate variability Climate modeling Abrupt changes |
spellingShingle |
Glacial climate variability Climate modeling Abrupt changes Álvarez-Solas, J. Robinson, Alexander Montoya, Marisa Ritz, Catherine Iceberg discharges of the last glacial period driven by oceanic circulation changes |
topic_facet |
Glacial climate variability Climate modeling Abrupt changes |
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. Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Álvarez-Solas, J. Robinson, Alexander Montoya, Marisa Ritz, Catherine |
author_facet |
Álvarez-Solas, J. Robinson, Alexander Montoya, Marisa Ritz, Catherine |
author_sort |
Álvarez-Solas, J. |
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 (U.S.) |
publishDate |
2013 |
url |
http://hdl.handle.net/10261/83135 https://doi.org/10.1073/pnas.1306622110 |
genre |
Ice Sheet Ice Shelf North Atlantic |
genre_facet |
Ice Sheet Ice Shelf North Atlantic |
op_relation |
http://www.pnas.org/cgi/doi/10.1073/pnas.1306622110 Álvarez-Solas, J., Robinson, A., Montoya, M., & Ritz, C. (2013). Iceberg discharges of the last glacial period driven by oceanic circulation changes. Proceedings of the National Academy of Sciences. doi:10.1073/pnas.1306622110 http://hdl.handle.net/10261/83135 doi:10.1073/pnas.1306622110 1091-6490 24062437 |
op_rights |
open |
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_ |
1790601585590534144 |