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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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:1345 2023-05-15T16:50:03+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 http://eprints.esc.cam.ac.uk/1345/ http://eprints.esc.cam.ac.uk/1345/1/%2710d_Hall_etSPNA_last_230_a,_PaleO_PA2101.pdf https://doi.org/10.1029/2009PA001886 en eng AGU http://eprints.esc.cam.ac.uk/1345/1/%2710d_Hall_etSPNA_last_230_a,_PaleO_PA2101.pdf Hall, I. R. and Boessenkool, K. P. and Barker, S. and McCave, I. N. and Elderfield, H. (2010) Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years. Paleoceanography, 25. PA2101. DOI https://doi.org/10.1029/2009PA001886 <https://doi.org/10.1029/2009PA001886> 01 - Climate Change and Earth-Ocean Atmosphere Systems Article PeerReviewed 2010 ftucambridgeesc https://doi.org/10.1029/2009PA001886 2020-08-27T18:08:50Z 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 (d 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 University of Cambridge, Department of Earth Sciences: ESC Publications Paleoceanography 25 2 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems 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 |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
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 (d 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. |
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 |
AGU |
publishDate |
2010 |
url |
http://eprints.esc.cam.ac.uk/1345/ http://eprints.esc.cam.ac.uk/1345/1/%2710d_Hall_etSPNA_last_230_a,_PaleO_PA2101.pdf https://doi.org/10.1029/2009PA001886 |
genre |
Iceland north atlantic current North Atlantic North Atlantic oscillation |
genre_facet |
Iceland north atlantic current North Atlantic North Atlantic oscillation |
op_relation |
http://eprints.esc.cam.ac.uk/1345/1/%2710d_Hall_etSPNA_last_230_a,_PaleO_PA2101.pdf Hall, I. R. and Boessenkool, K. P. and Barker, S. and McCave, I. N. and Elderfield, H. (2010) Surface and deep ocean coupling in the subpolar North Atlantic during the last 230 years. Paleoceanography, 25. PA2101. DOI https://doi.org/10.1029/2009PA001886 <https://doi.org/10.1029/2009PA001886> |
op_doi |
https://doi.org/10.1029/2009PA001886 |
container_title |
Paleoceanography |
container_volume |
25 |
container_issue |
2 |
_version_ |
1766040240998318080 |