On the Movements of the North Atlantic Subpolar Front in the Preinstrumental Past*
International audience Three sediment records of sea surface temperature (SST) are analyzed that originate from distant locations in the North Atlantic, have centennial-to-multicentennial resolution, are based on the same reconstruction method and chronological assumptions, and span the past 15 000...
Published in: | Journal of Climate |
---|---|
Main Authors: | , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2016
|
Subjects: | |
Online Access: | https://hal.science/hal-02916842 https://hal.science/hal-02916842/document https://hal.science/hal-02916842/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20On%20the%20Movements%20of%20the%20North%20Atlantic%20Subpolar%20Front%20in%20the%20Preinstrumental%20Past.pdf https://doi.org/10.1175/JCLI-D-15-0509.1 |
id |
ftunivbrest:oai:HAL:hal-02916842v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Marchal, Olivier Waelbroeck, Claire Colin de Verdiere, Alain On the Movements of the North Atlantic Subpolar Front in the Preinstrumental Past* |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Three sediment records of sea surface temperature (SST) are analyzed that originate from distant locations in the North Atlantic, have centennial-to-multicentennial resolution, are based on the same reconstruction method and chronological assumptions, and span the past 15 000 yr. Using recursive least squares techniques, an estimate of the time-dependent North Atlantic SST field over the last 15 kyr is sought that is consistent with both the SST records and a surface ocean circulation model, given estimates of their respective error (co)variances. Under the authors’ assumptions about data and model errors, it is found that the 10°C mixed layer isotherm, which approximately traces the modern Subpolar Front, would have moved by ~15° of latitude southward (northward) in the eastern North Atlantic at the onset (termination) of the Younger Dryas cold interval (YD), a result significant at the level of two standard deviations in the isotherm position. In contrast, meridional movements of the isotherm in the Newfoundland basin are estimated to be small and not significant. Thus, the isotherm would have pivoted twice around a region southeast of the Grand Banks, with a southwest–northeast orientation during the warm intervals of the Bølling–Allerød and the Holocene and a more zonal orientation and southerly position during the cold interval of the YD. This study provides an assessment of the significance of similar previous inferences and illustrates the potential of recursive least squares in paleoceanography. |
author2 |
Woods Hole Oceanographic Institution (WHOI) Paléocéanographie (PALEOCEAN) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) European Project: 339108,EC:FP7:ERC,ERC-2013-ADG,ACCLIMATE(2014) |
format |
Article in Journal/Newspaper |
author |
Marchal, Olivier Waelbroeck, Claire Colin de Verdiere, Alain |
author_facet |
Marchal, Olivier Waelbroeck, Claire Colin de Verdiere, Alain |
author_sort |
Marchal, Olivier |
title |
On the Movements of the North Atlantic Subpolar Front in the Preinstrumental Past* |
title_short |
On the Movements of the North Atlantic Subpolar Front in the Preinstrumental Past* |
title_full |
On the Movements of the North Atlantic Subpolar Front in the Preinstrumental Past* |
title_fullStr |
On the Movements of the North Atlantic Subpolar Front in the Preinstrumental Past* |
title_full_unstemmed |
On the Movements of the North Atlantic Subpolar Front in the Preinstrumental Past* |
title_sort |
on the movements of the north atlantic subpolar front in the preinstrumental past* |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-02916842 https://hal.science/hal-02916842/document https://hal.science/hal-02916842/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20On%20the%20Movements%20of%20the%20North%20Atlantic%20Subpolar%20Front%20in%20the%20Preinstrumental%20Past.pdf https://doi.org/10.1175/JCLI-D-15-0509.1 |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_source |
ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-02916842 Journal of Climate, 2016, 29 (4), pp.1545-1571. ⟨10.1175/JCLI-D-15-0509.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-15-0509.1 info:eu-repo/grantAgreement/EC/FP7/339108/EU/Elucidating the Causes and Effects of Atlantic Circulation Changes through Model-Data Integration/ACCLIMATE hal-02916842 https://hal.science/hal-02916842 https://hal.science/hal-02916842/document https://hal.science/hal-02916842/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20On%20the%20Movements%20of%20the%20North%20Atlantic%20Subpolar%20Front%20in%20the%20Preinstrumental%20Past.pdf doi:10.1175/JCLI-D-15-0509.1 WOS: 000370452200001 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JCLI-D-15-0509.1 |
container_title |
Journal of Climate |
container_volume |
29 |
container_issue |
4 |
container_start_page |
1545 |
op_container_end_page |
1571 |
_version_ |
1797587314914885632 |
spelling |
ftunivbrest:oai:HAL:hal-02916842v1 2024-04-28T08:28:56+00:00 On the Movements of the North Atlantic Subpolar Front in the Preinstrumental Past* Marchal, Olivier Waelbroeck, Claire Colin de Verdiere, Alain Woods Hole Oceanographic Institution (WHOI) Paléocéanographie (PALEOCEAN) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) European Project: 339108,EC:FP7:ERC,ERC-2013-ADG,ACCLIMATE(2014) 2016 https://hal.science/hal-02916842 https://hal.science/hal-02916842/document https://hal.science/hal-02916842/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20On%20the%20Movements%20of%20the%20North%20Atlantic%20Subpolar%20Front%20in%20the%20Preinstrumental%20Past.pdf https://doi.org/10.1175/JCLI-D-15-0509.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-15-0509.1 info:eu-repo/grantAgreement/EC/FP7/339108/EU/Elucidating the Causes and Effects of Atlantic Circulation Changes through Model-Data Integration/ACCLIMATE hal-02916842 https://hal.science/hal-02916842 https://hal.science/hal-02916842/document https://hal.science/hal-02916842/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20On%20the%20Movements%20of%20the%20North%20Atlantic%20Subpolar%20Front%20in%20the%20Preinstrumental%20Past.pdf doi:10.1175/JCLI-D-15-0509.1 WOS: 000370452200001 info:eu-repo/semantics/OpenAccess ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-02916842 Journal of Climate, 2016, 29 (4), pp.1545-1571. ⟨10.1175/JCLI-D-15-0509.1⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2016 ftunivbrest https://doi.org/10.1175/JCLI-D-15-0509.1 2024-04-10T23:47:36Z International audience Three sediment records of sea surface temperature (SST) are analyzed that originate from distant locations in the North Atlantic, have centennial-to-multicentennial resolution, are based on the same reconstruction method and chronological assumptions, and span the past 15 000 yr. Using recursive least squares techniques, an estimate of the time-dependent North Atlantic SST field over the last 15 kyr is sought that is consistent with both the SST records and a surface ocean circulation model, given estimates of their respective error (co)variances. Under the authors’ assumptions about data and model errors, it is found that the 10°C mixed layer isotherm, which approximately traces the modern Subpolar Front, would have moved by ~15° of latitude southward (northward) in the eastern North Atlantic at the onset (termination) of the Younger Dryas cold interval (YD), a result significant at the level of two standard deviations in the isotherm position. In contrast, meridional movements of the isotherm in the Newfoundland basin are estimated to be small and not significant. Thus, the isotherm would have pivoted twice around a region southeast of the Grand Banks, with a southwest–northeast orientation during the warm intervals of the Bølling–Allerød and the Holocene and a more zonal orientation and southerly position during the cold interval of the YD. This study provides an assessment of the significance of similar previous inferences and illustrates the potential of recursive least squares in paleoceanography. Article in Journal/Newspaper Newfoundland North Atlantic Université de Bretagne Occidentale: HAL Journal of Climate 29 4 1545 1571 |