Icebergs in the Nordic Seas Throughout the Late Pliocene
The Arctic cryosphere is changing and making a significant contribution to sea level rise. The Late Pliocene had similar CO2 levels to the present and a warming comparable to model predictions for the end of this century. However, the state of the Arctic cryosphere during the Pliocene remains poorly...
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Online Access: | https://archimer.ifremer.fr/doc/00504/61593/65884.pdf https://doi.org/10.1002/2017PA003240 https://archimer.ifremer.fr/doc/00504/61593/ |
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ftarchimer:oai:archimer.ifremer.fr:61593 2023-05-15T14:30:58+02:00 Icebergs in the Nordic Seas Throughout the Late Pliocene Smith, Y. M. Hill, D. J. Dolan, A. M. Haywood, A. M. Dowsett, H. J. Risebrobakken, B. 2018-03 application/pdf https://archimer.ifremer.fr/doc/00504/61593/65884.pdf https://doi.org/10.1002/2017PA003240 https://archimer.ifremer.fr/doc/00504/61593/ eng eng Amer Geophysical Union info:eu-repo/grantAgreement/EC/FP7/27836/EU//PLIO-ESS https://archimer.ifremer.fr/doc/00504/61593/65884.pdf doi:10.1002/2017PA003240 https://archimer.ifremer.fr/doc/00504/61593/ info:eu-repo/semantics/openAccess restricted use Paleoceanography And Paleoclimatology (2572-4517) (Amer Geophysical Union), 2018-03 , Vol. 33 , N. 3 , P. 318-335 text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.1002/2017PA003240 2021-09-23T20:33:05Z The Arctic cryosphere is changing and making a significant contribution to sea level rise. The Late Pliocene had similar CO2 levels to the present and a warming comparable to model predictions for the end of this century. However, the state of the Arctic cryosphere during the Pliocene remains poorly constrained. For the first time we combine outputs from a climate model with a thermodynamic iceberg model to simulate likely source regions for ice-rafted debris (IRD) found in the Nordic Seas from Marine Isotope Stage M2 to the mid-Piacenzian Warm Period and what this implies about the nature of the Arctic cryosphere at this time. We compare the fraction of melt given by the model scenarios with IRD data from four Ocean Drilling Program sites in the Nordic Seas. Sites 911A, 909C, and 907A show a persistent occurrence of IRD that model results suggest is consistent with permanent ice on Svalbard. Our results indicate that icebergs sourced from the east coast of Greenland do not reach the Nordic Seas sites during the warm Late Pliocene but instead travel south into the North Atlantic. In conclusion, we suggest a continuous occurrence of marine-terminating glaciers on Svalbard and on East Greenland (due to the elevation of the East Greenland Mountains during the Late Pliocene). The study has highlighted the usefulness of coupled climate model-iceberg trajectory modeling for understanding ice sheet behavior when proximal geological records for Pliocene ice presence or absence are absent or are inconclusive. Article in Journal/Newspaper arctic cryosphere Arctic East Greenland Greenland Ice Sheet Iceberg* Nordic Seas North Atlantic Svalbard Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Greenland Svalbard Paleoceanography and Paleoclimatology 33 3 318 335 |
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 Arctic cryosphere is changing and making a significant contribution to sea level rise. The Late Pliocene had similar CO2 levels to the present and a warming comparable to model predictions for the end of this century. However, the state of the Arctic cryosphere during the Pliocene remains poorly constrained. For the first time we combine outputs from a climate model with a thermodynamic iceberg model to simulate likely source regions for ice-rafted debris (IRD) found in the Nordic Seas from Marine Isotope Stage M2 to the mid-Piacenzian Warm Period and what this implies about the nature of the Arctic cryosphere at this time. We compare the fraction of melt given by the model scenarios with IRD data from four Ocean Drilling Program sites in the Nordic Seas. Sites 911A, 909C, and 907A show a persistent occurrence of IRD that model results suggest is consistent with permanent ice on Svalbard. Our results indicate that icebergs sourced from the east coast of Greenland do not reach the Nordic Seas sites during the warm Late Pliocene but instead travel south into the North Atlantic. In conclusion, we suggest a continuous occurrence of marine-terminating glaciers on Svalbard and on East Greenland (due to the elevation of the East Greenland Mountains during the Late Pliocene). The study has highlighted the usefulness of coupled climate model-iceberg trajectory modeling for understanding ice sheet behavior when proximal geological records for Pliocene ice presence or absence are absent or are inconclusive. |
format |
Article in Journal/Newspaper |
author |
Smith, Y. M. Hill, D. J. Dolan, A. M. Haywood, A. M. Dowsett, H. J. Risebrobakken, B. |
spellingShingle |
Smith, Y. M. Hill, D. J. Dolan, A. M. Haywood, A. M. Dowsett, H. J. Risebrobakken, B. Icebergs in the Nordic Seas Throughout the Late Pliocene |
author_facet |
Smith, Y. M. Hill, D. J. Dolan, A. M. Haywood, A. M. Dowsett, H. J. Risebrobakken, B. |
author_sort |
Smith, Y. M. |
title |
Icebergs in the Nordic Seas Throughout the Late Pliocene |
title_short |
Icebergs in the Nordic Seas Throughout the Late Pliocene |
title_full |
Icebergs in the Nordic Seas Throughout the Late Pliocene |
title_fullStr |
Icebergs in the Nordic Seas Throughout the Late Pliocene |
title_full_unstemmed |
Icebergs in the Nordic Seas Throughout the Late Pliocene |
title_sort |
icebergs in the nordic seas throughout the late pliocene |
publisher |
Amer Geophysical Union |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00504/61593/65884.pdf https://doi.org/10.1002/2017PA003240 https://archimer.ifremer.fr/doc/00504/61593/ |
geographic |
Arctic Greenland Svalbard |
geographic_facet |
Arctic Greenland Svalbard |
genre |
arctic cryosphere Arctic East Greenland Greenland Ice Sheet Iceberg* Nordic Seas North Atlantic Svalbard |
genre_facet |
arctic cryosphere Arctic East Greenland Greenland Ice Sheet Iceberg* Nordic Seas North Atlantic Svalbard |
op_source |
Paleoceanography And Paleoclimatology (2572-4517) (Amer Geophysical Union), 2018-03 , Vol. 33 , N. 3 , P. 318-335 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/27836/EU//PLIO-ESS https://archimer.ifremer.fr/doc/00504/61593/65884.pdf doi:10.1002/2017PA003240 https://archimer.ifremer.fr/doc/00504/61593/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1002/2017PA003240 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
33 |
container_issue |
3 |
container_start_page |
318 |
op_container_end_page |
335 |
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1766304714246324224 |