Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing
The oceanic hydrography of the north-easternmost region of the North Atlantic subtropical gyre has been monitored since 2003 by three sections extending between 100 and 200 nautical miles from the Spanish NW and N coast into the Atlantic and the Bay of Biscay. The sections were occupied twice a year...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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Online Access: | https://eprints.soton.ac.uk/374338/ https://eprints.soton.ac.uk/374338/1/Prieto_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf |
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ftsouthampton:oai:eprints.soton.ac.uk:374338 2023-07-30T04:04:43+02:00 Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing Prieto, E. González-Pola, C. Lavín, A. Holliday, N.P. 2015-02 text https://eprints.soton.ac.uk/374338/ https://eprints.soton.ac.uk/374338/1/Prieto_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf en English eng https://eprints.soton.ac.uk/374338/1/Prieto_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf Prieto, E., González-Pola, C., Lavín, A. and Holliday, N.P. (2015) Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing. Journal of Geophysical Research: Oceans, 120 (2), 832-847. (doi:10.1002/2014JC010436 <http://dx.doi.org/10.1002/2014JC010436>). Article PeerReviewed 2015 ftsouthampton https://doi.org/10.1002/2014JC010436 2023-07-09T21:57:37Z The oceanic hydrography of the north-easternmost region of the North Atlantic subtropical gyre has been monitored since 2003 by three sections extending between 100 and 200 nautical miles from the Spanish NW and N coast into the Atlantic and the Bay of Biscay. The sections were occupied twice a year from 2003 to 2010, annually after that, and measure the whole water column (>5000 m). Correlation of series in the vertical and among sections, autocorrelation and estimates of the effect of the noise induced by the mesoscale field, all indicate that observed signatures are robust changes of water masses at the regional scale. The hydrographic time series are not characterized by smooth trends but instead by shifts that persist through consecutive cruises. The most notable features include a shift to more saline central waters around 2005 after which they remained stable, and a decrease in thermohaline properties of the Labrador Sea Water from autumn 2008 to 2010. Years with a strong winter North Atlantic Oscillation (NAO) index are characterized by shifts in thermohaline properties across most of the intermediate levels, with the most notable event being the warming and increasing salinity that followed the large NAO index drop of 2010. The observations are consistent with current understanding of the large-scale functioning of the North Atlantic, which predicts a northeastward expansion of subtropical temperate waters in the eastern boundary as a response to NAO forcing. The observed variability is discussed in relationship to large-scale circulation. Article in Journal/Newspaper Labrador Sea North Atlantic North Atlantic oscillation University of Southampton: e-Prints Soton Journal of Geophysical Research: Oceans 120 2 832 847 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The oceanic hydrography of the north-easternmost region of the North Atlantic subtropical gyre has been monitored since 2003 by three sections extending between 100 and 200 nautical miles from the Spanish NW and N coast into the Atlantic and the Bay of Biscay. The sections were occupied twice a year from 2003 to 2010, annually after that, and measure the whole water column (>5000 m). Correlation of series in the vertical and among sections, autocorrelation and estimates of the effect of the noise induced by the mesoscale field, all indicate that observed signatures are robust changes of water masses at the regional scale. The hydrographic time series are not characterized by smooth trends but instead by shifts that persist through consecutive cruises. The most notable features include a shift to more saline central waters around 2005 after which they remained stable, and a decrease in thermohaline properties of the Labrador Sea Water from autumn 2008 to 2010. Years with a strong winter North Atlantic Oscillation (NAO) index are characterized by shifts in thermohaline properties across most of the intermediate levels, with the most notable event being the warming and increasing salinity that followed the large NAO index drop of 2010. The observations are consistent with current understanding of the large-scale functioning of the North Atlantic, which predicts a northeastward expansion of subtropical temperate waters in the eastern boundary as a response to NAO forcing. The observed variability is discussed in relationship to large-scale circulation. |
format |
Article in Journal/Newspaper |
author |
Prieto, E. González-Pola, C. Lavín, A. Holliday, N.P. |
spellingShingle |
Prieto, E. González-Pola, C. Lavín, A. Holliday, N.P. Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing |
author_facet |
Prieto, E. González-Pola, C. Lavín, A. Holliday, N.P. |
author_sort |
Prieto, E. |
title |
Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing |
title_short |
Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing |
title_full |
Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing |
title_fullStr |
Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing |
title_full_unstemmed |
Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing |
title_sort |
interannual variability of the northwestern iberia deep ocean: response to large-scale north atlantic forcing |
publishDate |
2015 |
url |
https://eprints.soton.ac.uk/374338/ https://eprints.soton.ac.uk/374338/1/Prieto_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf |
genre |
Labrador Sea North Atlantic North Atlantic oscillation |
genre_facet |
Labrador Sea North Atlantic North Atlantic oscillation |
op_relation |
https://eprints.soton.ac.uk/374338/1/Prieto_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf Prieto, E., González-Pola, C., Lavín, A. and Holliday, N.P. (2015) Interannual variability of the northwestern Iberia deep ocean: Response to large-scale North Atlantic forcing. Journal of Geophysical Research: Oceans, 120 (2), 832-847. (doi:10.1002/2014JC010436 <http://dx.doi.org/10.1002/2014JC010436>). |
op_doi |
https://doi.org/10.1002/2014JC010436 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
2 |
container_start_page |
832 |
op_container_end_page |
847 |
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1772816299150278656 |