Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum
The uncertain response of marine terminating outlet glaciers to climate change at time scales beyond short-term observation limits models of future sea level rise. At temperate tidewater margins, abundant subglacial meltwater forms morainal banks (marine shoals) or ice-contact deltas that reduce wat...
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ftarchimer:oai:archimer.ifremer.fr:80603 2023-05-15T16:40:53+02:00 Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum Cowan, Ellen A. Zellers, Sarah D. Müller, Juliane Walczak, Maureen H. Worthington, Lindsay L. Caissie, Beth E. Clary, Wesley A. Jaeger, John M. Gulick, Sean P. S. Pratt, Jacob W. Mix, Alan C. Fallon, Stewart J. 2020-04 application/pdf https://archimer.ifremer.fr/doc/00694/80603/83840.pdf https://archimer.ifremer.fr/doc/00694/80603/83841.pdf https://archimer.ifremer.fr/doc/00694/80603/83842.pdf https://archimer.ifremer.fr/doc/00694/80603/83843.pdf https://archimer.ifremer.fr/doc/00694/80603/83844.xlsx https://archimer.ifremer.fr/doc/00694/80603/83846.xlsx https://archimer.ifremer.fr/doc/00694/80603/83847.xlsx https://archimer.ifremer.fr/doc/00694/80603/83848.xlsx https://archimer.ifremer.fr/doc/00694/80603/83849.xlsx https://archimer.ifremer.fr/doc/00694/80603/83850.xlsx https://archimer.ifremer.fr/doc/00694/80603/83851.xlsx https://archimer.ifremer.fr/doc/00694/80603/83852.xlsx https://archimer.ifremer.fr/doc/00694/80603/83853.xlsx https://doi.org/10.1038/s41467-020-15579-0 https://archimer.ifremer.fr/doc/00694/80603/ eng eng Springer Science and Business Media LLC https://archimer.ifremer.fr/doc/00694/80603/83840.pdf https://archimer.ifremer.fr/doc/00694/80603/83841.pdf https://archimer.ifremer.fr/doc/00694/80603/83842.pdf https://archimer.ifremer.fr/doc/00694/80603/83843.pdf https://archimer.ifremer.fr/doc/00694/80603/83844.xlsx https://archimer.ifremer.fr/doc/00694/80603/83846.xlsx https://archimer.ifremer.fr/doc/00694/80603/83847.xlsx https://archimer.ifremer.fr/doc/00694/80603/83848.xlsx https://archimer.ifremer.fr/doc/00694/80603/83849.xlsx https://archimer.ifremer.fr/doc/00694/80603/83850.xlsx https://archimer.ifremer.fr/doc/00694/80603/83851.xlsx https://archimer.ifremer.fr/doc/00694/80603/83852.xlsx https://archimer.ifremer.fr/doc/00694/80603/83853.xlsx doi:10.1038/s41467-020-15579-0 https://archimer.ifremer.fr/doc/00694/80603/ info:eu-repo/semantics/openAccess restricted use Nature Communications (2041-1723) (Springer Science and Business Media LLC), 2020-04 , Vol. 11 , N. 1 , P. 1826 (9p.) text Publication info:eu-repo/semantics/article 2020 ftarchimer https://doi.org/10.1038/s41467-020-15579-0 2021-10-05T22:48:30Z The uncertain response of marine terminating outlet glaciers to climate change at time scales beyond short-term observation limits models of future sea level rise. At temperate tidewater margins, abundant subglacial meltwater forms morainal banks (marine shoals) or ice-contact deltas that reduce water depth, stabilizing grounding lines and slowing or reversing glacial retreat. Here we present a radiocarbon-dated record from Integrated Ocean Drilling Program (IODP) Site U1421 that tracks the terminus of the largest Alaskan Cordilleran Ice Sheet outlet glacier during Last Glacial Maximum climate transitions. Sedimentation rates, ice-rafted debris, and microfossil and biogeochemical proxies, show repeated abrupt collapses and slow advances typical of the tidewater glacier cycle observed in modern systems. When global sea level rise exceeded the local rate of bank building, the cycle of readvances stopped leading to irreversible retreat. These results support theory that suggests sediment dynamics can control tidewater terminus position on an open shelf under temperate conditions delaying climate-driven retreat. Article in Journal/Newspaper Ice Sheet Tidewater Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Nature Communications 11 1 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The uncertain response of marine terminating outlet glaciers to climate change at time scales beyond short-term observation limits models of future sea level rise. At temperate tidewater margins, abundant subglacial meltwater forms morainal banks (marine shoals) or ice-contact deltas that reduce water depth, stabilizing grounding lines and slowing or reversing glacial retreat. Here we present a radiocarbon-dated record from Integrated Ocean Drilling Program (IODP) Site U1421 that tracks the terminus of the largest Alaskan Cordilleran Ice Sheet outlet glacier during Last Glacial Maximum climate transitions. Sedimentation rates, ice-rafted debris, and microfossil and biogeochemical proxies, show repeated abrupt collapses and slow advances typical of the tidewater glacier cycle observed in modern systems. When global sea level rise exceeded the local rate of bank building, the cycle of readvances stopped leading to irreversible retreat. These results support theory that suggests sediment dynamics can control tidewater terminus position on an open shelf under temperate conditions delaying climate-driven retreat. |
format |
Article in Journal/Newspaper |
author |
Cowan, Ellen A. Zellers, Sarah D. Müller, Juliane Walczak, Maureen H. Worthington, Lindsay L. Caissie, Beth E. Clary, Wesley A. Jaeger, John M. Gulick, Sean P. S. Pratt, Jacob W. Mix, Alan C. Fallon, Stewart J. |
spellingShingle |
Cowan, Ellen A. Zellers, Sarah D. Müller, Juliane Walczak, Maureen H. Worthington, Lindsay L. Caissie, Beth E. Clary, Wesley A. Jaeger, John M. Gulick, Sean P. S. Pratt, Jacob W. Mix, Alan C. Fallon, Stewart J. Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum |
author_facet |
Cowan, Ellen A. Zellers, Sarah D. Müller, Juliane Walczak, Maureen H. Worthington, Lindsay L. Caissie, Beth E. Clary, Wesley A. Jaeger, John M. Gulick, Sean P. S. Pratt, Jacob W. Mix, Alan C. Fallon, Stewart J. |
author_sort |
Cowan, Ellen A. |
title |
Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum |
title_short |
Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum |
title_full |
Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum |
title_fullStr |
Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum |
title_full_unstemmed |
Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum |
title_sort |
sediment controls dynamic behavior of a cordilleran ice stream at the last glacial maximum |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
https://archimer.ifremer.fr/doc/00694/80603/83840.pdf https://archimer.ifremer.fr/doc/00694/80603/83841.pdf https://archimer.ifremer.fr/doc/00694/80603/83842.pdf https://archimer.ifremer.fr/doc/00694/80603/83843.pdf https://archimer.ifremer.fr/doc/00694/80603/83844.xlsx https://archimer.ifremer.fr/doc/00694/80603/83846.xlsx https://archimer.ifremer.fr/doc/00694/80603/83847.xlsx https://archimer.ifremer.fr/doc/00694/80603/83848.xlsx https://archimer.ifremer.fr/doc/00694/80603/83849.xlsx https://archimer.ifremer.fr/doc/00694/80603/83850.xlsx https://archimer.ifremer.fr/doc/00694/80603/83851.xlsx https://archimer.ifremer.fr/doc/00694/80603/83852.xlsx https://archimer.ifremer.fr/doc/00694/80603/83853.xlsx https://doi.org/10.1038/s41467-020-15579-0 https://archimer.ifremer.fr/doc/00694/80603/ |
genre |
Ice Sheet Tidewater |
genre_facet |
Ice Sheet Tidewater |
op_source |
Nature Communications (2041-1723) (Springer Science and Business Media LLC), 2020-04 , Vol. 11 , N. 1 , P. 1826 (9p.) |
op_relation |
https://archimer.ifremer.fr/doc/00694/80603/83840.pdf https://archimer.ifremer.fr/doc/00694/80603/83841.pdf https://archimer.ifremer.fr/doc/00694/80603/83842.pdf https://archimer.ifremer.fr/doc/00694/80603/83843.pdf https://archimer.ifremer.fr/doc/00694/80603/83844.xlsx https://archimer.ifremer.fr/doc/00694/80603/83846.xlsx https://archimer.ifremer.fr/doc/00694/80603/83847.xlsx https://archimer.ifremer.fr/doc/00694/80603/83848.xlsx https://archimer.ifremer.fr/doc/00694/80603/83849.xlsx https://archimer.ifremer.fr/doc/00694/80603/83850.xlsx https://archimer.ifremer.fr/doc/00694/80603/83851.xlsx https://archimer.ifremer.fr/doc/00694/80603/83852.xlsx https://archimer.ifremer.fr/doc/00694/80603/83853.xlsx doi:10.1038/s41467-020-15579-0 https://archimer.ifremer.fr/doc/00694/80603/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1038/s41467-020-15579-0 |
container_title |
Nature Communications |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766031310735802368 |