Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010
The combination of remotely sensed gappy Sea surface temperature (SST) images with the missing data filling DINEOF (data interpolating empirical orthogonal functions) technique, followed by a principal component analysis of the reconstructed data, has been used to identify the time evolution and the...
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fthzgzmk:oai:publications.hereon.de:30897 2023-06-11T04:14:27+02:00 Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010 Esnaola, G. Saenz, J. Zorita, E. Fontain, A. Valencia, V. Lazure, P. 2013 https://publications.hereon.de/id/30897 https://publications.hzg.de/id/30897 https://doi.org/10.5194/os-9-655-2013 en eng EGU - Copernicus Publication http://dx.doi.org/10.5194/os-9-655-2013 urn:issn:1812-0784 https://publications.hereon.de/id/30897 https://publications.hzg.de/id/30897 info:eu-repo/semantics/openAccess open_access oa_gold issn:1812-0784 Esnaola, G.; Saenz, J.; Zorita, E.; Fontain, A.; Valencia, V.; Lazure, P.: Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010. In: Ocean Science. Vol. 9 (2013) 4, 655 - 679. (DOI:10.5194/os-9-655-2013) info:eu-repo/classification/ddc/551 info:eu-repo/semantics/article Zeitschrift Artikel 2013 fthzgzmk https://doi.org/10.5194/os-9-655-2013 2023-05-28T23:23:40Z The combination of remotely sensed gappy Sea surface temperature (SST) images with the missing data filling DINEOF (data interpolating empirical orthogonal functions) technique, followed by a principal component analysis of the reconstructed data, has been used to identify the time evolution and the daily scale variability of the wintertime surface signal of the Iberian Poleward Current (IPC), or Navidad, during the 1981–2010 period. An exhaustive comparison with the existing bibliography, and the vertical temperature and salinity profiles related to its extremes over the Bay of Biscay area, show that the obtained time series accurately reflect the IPC-Navidad variability. Once a time series for the evolution of the SST signal of the current over the last decades is well established, this time series is used to propose a physical mechanism in relation to the variability of the IPC-Navidad, involving both atmospheric and oceanic variables. According to the proposed mechanism, an atmospheric circulation anomaly observed in both the 500 hPa and the surface levels generates atmospheric surface level pressure, wind-stress and heat-flux anomalies. In turn, those surface level atmospheric anomalies induce mutually coherent SST and sea level anomalies over the North Atlantic area, and locally, in the Bay of Biscay area. These anomalies, both locally over the Bay of Biscay area and over the North Atlantic, are in agreement with several mechanisms that have separately been related to the variability of the IPC-Navidad, i.e. the south-westerly winds, the joint effect of baroclinicity and relief (JEBAR) effect, the topographic β effect and a weakened North Atlantic gyre. Article in Journal/Newspaper North Atlantic Hereon Publications (Helmholtz-Zentrum) Navidad ENVELOPE(-62.100,-62.100,-64.583,-64.583) Ocean Science 9 4 655 679 |
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Open Polar |
collection |
Hereon Publications (Helmholtz-Zentrum) |
op_collection_id |
fthzgzmk |
language |
English |
topic |
info:eu-repo/classification/ddc/551 |
spellingShingle |
info:eu-repo/classification/ddc/551 Esnaola, G. Saenz, J. Zorita, E. Fontain, A. Valencia, V. Lazure, P. Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010 |
topic_facet |
info:eu-repo/classification/ddc/551 |
description |
The combination of remotely sensed gappy Sea surface temperature (SST) images with the missing data filling DINEOF (data interpolating empirical orthogonal functions) technique, followed by a principal component analysis of the reconstructed data, has been used to identify the time evolution and the daily scale variability of the wintertime surface signal of the Iberian Poleward Current (IPC), or Navidad, during the 1981–2010 period. An exhaustive comparison with the existing bibliography, and the vertical temperature and salinity profiles related to its extremes over the Bay of Biscay area, show that the obtained time series accurately reflect the IPC-Navidad variability. Once a time series for the evolution of the SST signal of the current over the last decades is well established, this time series is used to propose a physical mechanism in relation to the variability of the IPC-Navidad, involving both atmospheric and oceanic variables. According to the proposed mechanism, an atmospheric circulation anomaly observed in both the 500 hPa and the surface levels generates atmospheric surface level pressure, wind-stress and heat-flux anomalies. In turn, those surface level atmospheric anomalies induce mutually coherent SST and sea level anomalies over the North Atlantic area, and locally, in the Bay of Biscay area. These anomalies, both locally over the Bay of Biscay area and over the North Atlantic, are in agreement with several mechanisms that have separately been related to the variability of the IPC-Navidad, i.e. the south-westerly winds, the joint effect of baroclinicity and relief (JEBAR) effect, the topographic β effect and a weakened North Atlantic gyre. |
format |
Article in Journal/Newspaper |
author |
Esnaola, G. Saenz, J. Zorita, E. Fontain, A. Valencia, V. Lazure, P. |
author_facet |
Esnaola, G. Saenz, J. Zorita, E. Fontain, A. Valencia, V. Lazure, P. |
author_sort |
Esnaola, G. |
title |
Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010 |
title_short |
Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010 |
title_full |
Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010 |
title_fullStr |
Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010 |
title_full_unstemmed |
Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010 |
title_sort |
daily scale wintertime sea surface temperature and ipc-navidad variability in the southern bay of biscay from 1981 to 2010 |
publisher |
EGU - Copernicus Publication |
publishDate |
2013 |
url |
https://publications.hereon.de/id/30897 https://publications.hzg.de/id/30897 https://doi.org/10.5194/os-9-655-2013 |
long_lat |
ENVELOPE(-62.100,-62.100,-64.583,-64.583) |
geographic |
Navidad |
geographic_facet |
Navidad |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
issn:1812-0784 Esnaola, G.; Saenz, J.; Zorita, E.; Fontain, A.; Valencia, V.; Lazure, P.: Daily scale wintertime sea surface temperature and IPC-Navidad variability in the southern Bay of Biscay from 1981 to 2010. In: Ocean Science. Vol. 9 (2013) 4, 655 - 679. (DOI:10.5194/os-9-655-2013) |
op_relation |
http://dx.doi.org/10.5194/os-9-655-2013 urn:issn:1812-0784 https://publications.hereon.de/id/30897 https://publications.hzg.de/id/30897 |
op_rights |
info:eu-repo/semantics/openAccess open_access oa_gold |
op_doi |
https://doi.org/10.5194/os-9-655-2013 |
container_title |
Ocean Science |
container_volume |
9 |
container_issue |
4 |
container_start_page |
655 |
op_container_end_page |
679 |
_version_ |
1768392454879313920 |