Sea surface temperature variability in the Norwegian Sea during the late Pliocene linked to subpolar gyre strength and radiative forcing
The mid-Piacenzian warm period (3.264-3.025 Ma) of the Pliocene epoch has been proposed as a possible reference for future warm climate states. However, there is significant disagreement over the magnitude of high latitude warming between data and models for this period of time, raising questions ab...
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Online Access: | https://doi.org/10.1016/j.epsl.2016.04.024 https://archimer.ifremer.fr/doc/00421/53230/83372.pdf https://archimer.ifremer.fr/doc/00421/53230/ |
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fttriple:oai:gotriple.eu:10670/1.7p0gvw 2023-05-15T17:24:22+02:00 Sea surface temperature variability in the Norwegian Sea during the late Pliocene linked to subpolar gyre strength and radiative forcing Bachem, Paul E. Risebrobakken, Bjorg Mcclymont, Erin L. https://doi.org/10.1016/j.epsl.2016.04.024 https://archimer.ifremer.fr/doc/00421/53230/83372.pdf https://archimer.ifremer.fr/doc/00421/53230/ en eng Elsevier Science Bv doi:10.1016/j.epsl.2016.04.024 10670/1.7p0gvw https://archimer.ifremer.fr/doc/00421/53230/83372.pdf https://archimer.ifremer.fr/doc/00421/53230/ other Archimer, archive institutionnelle de l'Ifremer Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2016-07 , Vol. 446 , P. 113-122 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1016/j.epsl.2016.04.024 2023-01-22T17:47:43Z The mid-Piacenzian warm period (3.264-3.025 Ma) of the Pliocene epoch has been proposed as a possible reference for future warm climate states. However, there is significant disagreement over the magnitude of high latitude warming between data and models for this period of time, raising questions about the driving mechanisms and responsible feedbacks. We have developed a new set of orbital-resolution alkenone-based sea surface temperature (SST) and ice rafted debris (IRD) records from the Norwegian Sea spanning 3.264-3.14 Ma. The SSTs in the Norwegian Sea were 2-3 degrees C warmer than the Holocene average, likely caused by the radiative effect of higher atmospheric CO2 concentrations. There is notable obliquity-driven SST variability with a range of 4 degrees C, shown by evolutive spectra. The correlation of SST variability with the presence of IRD suggests a common climate forcing acting across the Nordic Seas region. Changes of the SST gradient between the Norwegian Sea and North Atlantic sites suggest that the subpolar gyre was at least as strong as during the Holocene, and that the northward heat transport by the North Atlantic Current was comparable. Text Nordic Seas north atlantic current North Atlantic Norwegian Sea Unknown Norwegian Sea Earth and Planetary Science Letters 446 113 122 |
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geo envir Bachem, Paul E. Risebrobakken, Bjorg Mcclymont, Erin L. Sea surface temperature variability in the Norwegian Sea during the late Pliocene linked to subpolar gyre strength and radiative forcing |
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geo envir |
description |
The mid-Piacenzian warm period (3.264-3.025 Ma) of the Pliocene epoch has been proposed as a possible reference for future warm climate states. However, there is significant disagreement over the magnitude of high latitude warming between data and models for this period of time, raising questions about the driving mechanisms and responsible feedbacks. We have developed a new set of orbital-resolution alkenone-based sea surface temperature (SST) and ice rafted debris (IRD) records from the Norwegian Sea spanning 3.264-3.14 Ma. The SSTs in the Norwegian Sea were 2-3 degrees C warmer than the Holocene average, likely caused by the radiative effect of higher atmospheric CO2 concentrations. There is notable obliquity-driven SST variability with a range of 4 degrees C, shown by evolutive spectra. The correlation of SST variability with the presence of IRD suggests a common climate forcing acting across the Nordic Seas region. Changes of the SST gradient between the Norwegian Sea and North Atlantic sites suggest that the subpolar gyre was at least as strong as during the Holocene, and that the northward heat transport by the North Atlantic Current was comparable. |
format |
Text |
author |
Bachem, Paul E. Risebrobakken, Bjorg Mcclymont, Erin L. |
author_facet |
Bachem, Paul E. Risebrobakken, Bjorg Mcclymont, Erin L. |
author_sort |
Bachem, Paul E. |
title |
Sea surface temperature variability in the Norwegian Sea during the late Pliocene linked to subpolar gyre strength and radiative forcing |
title_short |
Sea surface temperature variability in the Norwegian Sea during the late Pliocene linked to subpolar gyre strength and radiative forcing |
title_full |
Sea surface temperature variability in the Norwegian Sea during the late Pliocene linked to subpolar gyre strength and radiative forcing |
title_fullStr |
Sea surface temperature variability in the Norwegian Sea during the late Pliocene linked to subpolar gyre strength and radiative forcing |
title_full_unstemmed |
Sea surface temperature variability in the Norwegian Sea during the late Pliocene linked to subpolar gyre strength and radiative forcing |
title_sort |
sea surface temperature variability in the norwegian sea during the late pliocene linked to subpolar gyre strength and radiative forcing |
publisher |
Elsevier Science Bv |
url |
https://doi.org/10.1016/j.epsl.2016.04.024 https://archimer.ifremer.fr/doc/00421/53230/83372.pdf https://archimer.ifremer.fr/doc/00421/53230/ |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Nordic Seas north atlantic current North Atlantic Norwegian Sea |
genre_facet |
Nordic Seas north atlantic current North Atlantic Norwegian Sea |
op_source |
Archimer, archive institutionnelle de l'Ifremer Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2016-07 , Vol. 446 , P. 113-122 |
op_relation |
doi:10.1016/j.epsl.2016.04.024 10670/1.7p0gvw https://archimer.ifremer.fr/doc/00421/53230/83372.pdf https://archimer.ifremer.fr/doc/00421/53230/ |
op_rights |
other |
op_doi |
https://doi.org/10.1016/j.epsl.2016.04.024 |
container_title |
Earth and Planetary Science Letters |
container_volume |
446 |
container_start_page |
113 |
op_container_end_page |
122 |
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1766115329509949440 |