Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years
The subpolar North Atlantic Ocean (SPNA) is of key importance for modulating the climate of NW Europe because of heat loss to the atmosphere from the North Atlantic Current. Although hydrographic properties of the surface SPNA vary on interannual to multidecadal timescales, hydrographic time series...
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Amer Geophysical Union
2010
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Online Access: | https://archimer.ifremer.fr/doc/00231/34203/32762.pdf https://doi.org/10.1029/2009PA001886 https://archimer.ifremer.fr/doc/00231/34203/ |
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ftarchimer:oai:archimer.ifremer.fr:34203 2023-05-15T16:49:51+02:00 Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years Hall, I. R. Boessenkool, K. P. Barker, S. Mccave, I. N. Elderfield, H. 2010-06 application/pdf https://archimer.ifremer.fr/doc/00231/34203/32762.pdf https://doi.org/10.1029/2009PA001886 https://archimer.ifremer.fr/doc/00231/34203/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00231/34203/32762.pdf doi:10.1029/2009PA001886 https://archimer.ifremer.fr/doc/00231/34203/ Copyright 2010 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Paleoceanography (0883-8305) (Amer Geophysical Union), 2010-06 , Vol. 25 , N. 2 / PA2101 , P. 1-9 text Publication info:eu-repo/semantics/article 2010 ftarchimer https://doi.org/10.1029/2009PA001886 2021-09-23T20:25:14Z The subpolar North Atlantic Ocean (SPNA) is of key importance for modulating the climate of NW Europe because of heat loss to the atmosphere from the North Atlantic Current. Although hydrographic properties of the surface SPNA vary on interannual to multidecadal timescales, hydrographic time series scarcely extend back beyond the 1950s. We present a 230 year long record of SPNA surface conditions reconstructed from a very high accumulation rate core that also registers changes in deep flow speed in the Iceland Basin. A lagged correlation is observed between the records of deep flow speed and stable oxygen isotopic composition of the surface SPNA (delta(18)O(w)), with strongest correlation when the paleoflow speed record leads by 15-20 years. This offset may to some extent reflect size-selective biological mixing of the sediment. Nonetheless, these records reveal a decadal-scale coupling between surface and deep ocean variability over the past 230 years, possibly driven by the North Atlantic Oscillation, with implications for North Atlantic circulation and climate. Article in Journal/Newspaper Iceland north atlantic current North Atlantic North Atlantic oscillation Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Paleoceanography 25 2 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
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ftarchimer |
language |
English |
description |
The subpolar North Atlantic Ocean (SPNA) is of key importance for modulating the climate of NW Europe because of heat loss to the atmosphere from the North Atlantic Current. Although hydrographic properties of the surface SPNA vary on interannual to multidecadal timescales, hydrographic time series scarcely extend back beyond the 1950s. We present a 230 year long record of SPNA surface conditions reconstructed from a very high accumulation rate core that also registers changes in deep flow speed in the Iceland Basin. A lagged correlation is observed between the records of deep flow speed and stable oxygen isotopic composition of the surface SPNA (delta(18)O(w)), with strongest correlation when the paleoflow speed record leads by 15-20 years. This offset may to some extent reflect size-selective biological mixing of the sediment. Nonetheless, these records reveal a decadal-scale coupling between surface and deep ocean variability over the past 230 years, possibly driven by the North Atlantic Oscillation, with implications for North Atlantic circulation and climate. |
format |
Article in Journal/Newspaper |
author |
Hall, I. R. Boessenkool, K. P. Barker, S. Mccave, I. N. Elderfield, H. |
spellingShingle |
Hall, I. R. Boessenkool, K. P. Barker, S. Mccave, I. N. Elderfield, H. Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years |
author_facet |
Hall, I. R. Boessenkool, K. P. Barker, S. Mccave, I. N. Elderfield, H. |
author_sort |
Hall, I. R. |
title |
Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years |
title_short |
Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years |
title_full |
Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years |
title_fullStr |
Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years |
title_full_unstemmed |
Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years |
title_sort |
surface and deep ocean coupling in the subpolar north atlantic during the last 230 years |
publisher |
Amer Geophysical Union |
publishDate |
2010 |
url |
https://archimer.ifremer.fr/doc/00231/34203/32762.pdf https://doi.org/10.1029/2009PA001886 https://archimer.ifremer.fr/doc/00231/34203/ |
genre |
Iceland north atlantic current North Atlantic North Atlantic oscillation |
genre_facet |
Iceland north atlantic current North Atlantic North Atlantic oscillation |
op_source |
Paleoceanography (0883-8305) (Amer Geophysical Union), 2010-06 , Vol. 25 , N. 2 / PA2101 , P. 1-9 |
op_relation |
https://archimer.ifremer.fr/doc/00231/34203/32762.pdf doi:10.1029/2009PA001886 https://archimer.ifremer.fr/doc/00231/34203/ |
op_rights |
Copyright 2010 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2009PA001886 |
container_title |
Paleoceanography |
container_volume |
25 |
container_issue |
2 |
_version_ |
1766040033241858048 |