The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013
This study presents the characterization of variability in temperature, salinity and oxygen concentration, including the vertical structure of the variability, in the upper 1000 m of the ocean over a full year in the northeast Atlantic. Continuously profiling ocean gliders with vertical resolution b...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
2016
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Online Access: | https://authors.library.caltech.edu/71098/ https://authors.library.caltech.edu/71098/1/Damerell_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf https://authors.library.caltech.edu/71098/2/jgrc21704-sup-0001-2015JC011423-s01.pdf https://authors.library.caltech.edu/71098/3/jgrc21704-sup-0002-2015JC011423-fs01.jpg https://authors.library.caltech.edu/71098/4/jgrc21704-sup-0003-2015JC011423-fs02.jpg https://resolver.caltech.edu/CaltechAUTHORS:20161014-101531378 |
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ftcaltechauth:oai:authors.library.caltech.edu:71098 2023-05-15T17:41:36+02:00 The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013 Damerell, Gillian M. Heywood, Karen J. Thompson, Andrew F. Binetti, Umberto Kaiser, Jan 2016-05 application/pdf image/jpeg https://authors.library.caltech.edu/71098/ https://authors.library.caltech.edu/71098/1/Damerell_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf https://authors.library.caltech.edu/71098/2/jgrc21704-sup-0001-2015JC011423-s01.pdf https://authors.library.caltech.edu/71098/3/jgrc21704-sup-0002-2015JC011423-fs01.jpg https://authors.library.caltech.edu/71098/4/jgrc21704-sup-0003-2015JC011423-fs02.jpg https://resolver.caltech.edu/CaltechAUTHORS:20161014-101531378 en eng American Geophysical Union https://authors.library.caltech.edu/71098/1/Damerell_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf https://authors.library.caltech.edu/71098/2/jgrc21704-sup-0001-2015JC011423-s01.pdf https://authors.library.caltech.edu/71098/3/jgrc21704-sup-0002-2015JC011423-fs01.jpg https://authors.library.caltech.edu/71098/4/jgrc21704-sup-0003-2015JC011423-fs02.jpg Damerell, Gillian M. and Heywood, Karen J. and Thompson, Andrew F. and Binetti, Umberto and Kaiser, Jan (2016) The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013. Journal of Geophysical Research. Oceans, 121 (5). pp. 3075-3089. ISSN 2169-9275. doi:10.1002/2015JC011423. https://resolver.caltech.edu/CaltechAUTHORS:20161014-101531378 <https://resolver.caltech.edu/CaltechAUTHORS:20161014-101531378> cc_by CC-BY Article PeerReviewed 2016 ftcaltechauth https://doi.org/10.1002/2015JC011423 2021-11-18T18:39:19Z This study presents the characterization of variability in temperature, salinity and oxygen concentration, including the vertical structure of the variability, in the upper 1000 m of the ocean over a full year in the northeast Atlantic. Continuously profiling ocean gliders with vertical resolution between 0.5 and 1 m provide more information on temporal variability throughout the water column than time series from moorings with sensors at a limited number of fixed depths. The heat, salt and dissolved oxygen content are quantified at each depth. While the near surface heat content is consistent with the net surface heat flux, heat content of the deeper layers is driven by gyre-scale water mass changes. Below ∼150m, heat and salt content display intraseasonal variability which has not been resolved by previous studies. A mode-1 baroclinic internal tide is detected as a peak in the power spectra of water mass properties. The depth of minimum variability is at ∼415m for both temperature and salinity, but this is a depth of high variability for oxygen concentration. The deep variability is dominated by the intermittent appearance of Mediterranean Water, which shows evidence of filamentation. Susceptibility to salt fingering occurs throughout much of the water column for much of the year. Between about 700–900 m, the water column is susceptible to diffusive layering, particularly when Mediterranean Water is present. This unique ability to resolve both high vertical and temporal variability highlights the importance of intraseasonal variability in upper ocean heat and salt content, variations that may be aliased by traditional observing techniques. Article in Journal/Newspaper Northeast Atlantic Caltech Authors (California Institute of Technology) Journal of Geophysical Research: Oceans 121 5 3075 3089 |
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Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
This study presents the characterization of variability in temperature, salinity and oxygen concentration, including the vertical structure of the variability, in the upper 1000 m of the ocean over a full year in the northeast Atlantic. Continuously profiling ocean gliders with vertical resolution between 0.5 and 1 m provide more information on temporal variability throughout the water column than time series from moorings with sensors at a limited number of fixed depths. The heat, salt and dissolved oxygen content are quantified at each depth. While the near surface heat content is consistent with the net surface heat flux, heat content of the deeper layers is driven by gyre-scale water mass changes. Below ∼150m, heat and salt content display intraseasonal variability which has not been resolved by previous studies. A mode-1 baroclinic internal tide is detected as a peak in the power spectra of water mass properties. The depth of minimum variability is at ∼415m for both temperature and salinity, but this is a depth of high variability for oxygen concentration. The deep variability is dominated by the intermittent appearance of Mediterranean Water, which shows evidence of filamentation. Susceptibility to salt fingering occurs throughout much of the water column for much of the year. Between about 700–900 m, the water column is susceptible to diffusive layering, particularly when Mediterranean Water is present. This unique ability to resolve both high vertical and temporal variability highlights the importance of intraseasonal variability in upper ocean heat and salt content, variations that may be aliased by traditional observing techniques. |
format |
Article in Journal/Newspaper |
author |
Damerell, Gillian M. Heywood, Karen J. Thompson, Andrew F. Binetti, Umberto Kaiser, Jan |
spellingShingle |
Damerell, Gillian M. Heywood, Karen J. Thompson, Andrew F. Binetti, Umberto Kaiser, Jan The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013 |
author_facet |
Damerell, Gillian M. Heywood, Karen J. Thompson, Andrew F. Binetti, Umberto Kaiser, Jan |
author_sort |
Damerell, Gillian M. |
title |
The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013 |
title_short |
The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013 |
title_full |
The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013 |
title_fullStr |
The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013 |
title_full_unstemmed |
The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013 |
title_sort |
vertical structure of upper ocean variability at the porcupine abyssal plain during 2012-2013 |
publisher |
American Geophysical Union |
publishDate |
2016 |
url |
https://authors.library.caltech.edu/71098/ https://authors.library.caltech.edu/71098/1/Damerell_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf https://authors.library.caltech.edu/71098/2/jgrc21704-sup-0001-2015JC011423-s01.pdf https://authors.library.caltech.edu/71098/3/jgrc21704-sup-0002-2015JC011423-fs01.jpg https://authors.library.caltech.edu/71098/4/jgrc21704-sup-0003-2015JC011423-fs02.jpg https://resolver.caltech.edu/CaltechAUTHORS:20161014-101531378 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
https://authors.library.caltech.edu/71098/1/Damerell_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf https://authors.library.caltech.edu/71098/2/jgrc21704-sup-0001-2015JC011423-s01.pdf https://authors.library.caltech.edu/71098/3/jgrc21704-sup-0002-2015JC011423-fs01.jpg https://authors.library.caltech.edu/71098/4/jgrc21704-sup-0003-2015JC011423-fs02.jpg Damerell, Gillian M. and Heywood, Karen J. and Thompson, Andrew F. and Binetti, Umberto and Kaiser, Jan (2016) The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013. Journal of Geophysical Research. Oceans, 121 (5). pp. 3075-3089. ISSN 2169-9275. doi:10.1002/2015JC011423. https://resolver.caltech.edu/CaltechAUTHORS:20161014-101531378 <https://resolver.caltech.edu/CaltechAUTHORS:20161014-101531378> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/2015JC011423 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
121 |
container_issue |
5 |
container_start_page |
3075 |
op_container_end_page |
3089 |
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1766143234264793088 |