Subsurface fine scale patterns in an anticyclonic eddy off Cap-Vert peninsula observed from glider measurements
Glider measurements acquired along 4 transects between Cap‐Vert Peninsula and the Cape Verde archipelago in the eastern tropical North Atlantic during March‐April 2014 were used to investigate fine‐scale stirring in an anticyclonic eddy. The anticyclone was formed near 12°N off the continental shelf...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Amer Geophysical Union
2018
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/00450/56162/57708.pdf https://archimer.ifremer.fr/doc/00450/56162/57709.pdf https://doi.org/10.1029/2018JC014135 https://archimer.ifremer.fr/doc/00450/56162/ |
id |
ftarchimer:oai:archimer.ifremer.fr:56162 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:56162 2023-05-15T17:30:52+02:00 Subsurface fine scale patterns in an anticyclonic eddy off Cap-Vert peninsula observed from glider measurements Kolodziejczyk, Nicolas Testor, Pierre Lazar, Alban Echevin, Vincent Krahmann, Gerd Chaigneau, Alexis Gourcuff, Claire Wade, Malick Faye, Saliou Estrade, Philippe Capet, Xavier Mortier, Laurent Brehmer, Patrice Schuette, Florian Karstensen, Johannes 2018-09 application/pdf https://archimer.ifremer.fr/doc/00450/56162/57708.pdf https://archimer.ifremer.fr/doc/00450/56162/57709.pdf https://doi.org/10.1029/2018JC014135 https://archimer.ifremer.fr/doc/00450/56162/ eng eng Amer Geophysical Union info:eu-repo/grantAgreement/EC/FP7/603521/EU//PREFACE https://archimer.ifremer.fr/doc/00450/56162/57708.pdf https://archimer.ifremer.fr/doc/00450/56162/57709.pdf doi:10.1029/2018JC014135 https://archimer.ifremer.fr/doc/00450/56162/ 2018 American Geophysical Union. All rights reserved. info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2018-09 , Vol. 123 , N. 9 , P. 6312-6329 submesoscale stirring tropical Atlantic meoscale eddy glider measurements OMZ text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.1029/2018JC014135 2021-09-23T20:31:21Z Glider measurements acquired along 4 transects between Cap‐Vert Peninsula and the Cape Verde archipelago in the eastern tropical North Atlantic during March‐April 2014 were used to investigate fine‐scale stirring in an anticyclonic eddy. The anticyclone was formed near 12°N off the continental shelf and propagated north‐west towards the Cape Verde islands. At depth, between 100‐400 m, the isolated anticyclone core contained relatively oxygenated, low salinity South Atlantic Central Water, while the surrounding water masses were saltier and poorly oxygenated. The dynamical and thermohaline subsurface environment favored the generation of fine‐scale horizontal and vertical temperature and salinity structures in and around the core of the anticyclone. These features exhibited horizontal scales of O(10‐30 km) relatively small with respect to the eddy radius of O(150 km). The vertical scales of O(5‐100 m) were associated to density‐compensated gradient. Spectra of salinity and oxygen along isopycnals revealed a slope of around k‐2 in the 10‐100 km horizontal scale range. Further analyses suggest that the fine‐scale structures are likely related to tracer stirring processes. Such mesoscale anticyclonic eddies and the embedded fine‐scale tracers in and around them could play a major role in the transport of South Atlantic Central Water masses and ventilation of the North Atlantic Oxygen Minimum Zone. Article in Journal/Newspaper North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Journal of Geophysical Research: Oceans 123 9 6312 6329 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
submesoscale stirring tropical Atlantic meoscale eddy glider measurements OMZ |
spellingShingle |
submesoscale stirring tropical Atlantic meoscale eddy glider measurements OMZ Kolodziejczyk, Nicolas Testor, Pierre Lazar, Alban Echevin, Vincent Krahmann, Gerd Chaigneau, Alexis Gourcuff, Claire Wade, Malick Faye, Saliou Estrade, Philippe Capet, Xavier Mortier, Laurent Brehmer, Patrice Schuette, Florian Karstensen, Johannes Subsurface fine scale patterns in an anticyclonic eddy off Cap-Vert peninsula observed from glider measurements |
topic_facet |
submesoscale stirring tropical Atlantic meoscale eddy glider measurements OMZ |
description |
Glider measurements acquired along 4 transects between Cap‐Vert Peninsula and the Cape Verde archipelago in the eastern tropical North Atlantic during March‐April 2014 were used to investigate fine‐scale stirring in an anticyclonic eddy. The anticyclone was formed near 12°N off the continental shelf and propagated north‐west towards the Cape Verde islands. At depth, between 100‐400 m, the isolated anticyclone core contained relatively oxygenated, low salinity South Atlantic Central Water, while the surrounding water masses were saltier and poorly oxygenated. The dynamical and thermohaline subsurface environment favored the generation of fine‐scale horizontal and vertical temperature and salinity structures in and around the core of the anticyclone. These features exhibited horizontal scales of O(10‐30 km) relatively small with respect to the eddy radius of O(150 km). The vertical scales of O(5‐100 m) were associated to density‐compensated gradient. Spectra of salinity and oxygen along isopycnals revealed a slope of around k‐2 in the 10‐100 km horizontal scale range. Further analyses suggest that the fine‐scale structures are likely related to tracer stirring processes. Such mesoscale anticyclonic eddies and the embedded fine‐scale tracers in and around them could play a major role in the transport of South Atlantic Central Water masses and ventilation of the North Atlantic Oxygen Minimum Zone. |
format |
Article in Journal/Newspaper |
author |
Kolodziejczyk, Nicolas Testor, Pierre Lazar, Alban Echevin, Vincent Krahmann, Gerd Chaigneau, Alexis Gourcuff, Claire Wade, Malick Faye, Saliou Estrade, Philippe Capet, Xavier Mortier, Laurent Brehmer, Patrice Schuette, Florian Karstensen, Johannes |
author_facet |
Kolodziejczyk, Nicolas Testor, Pierre Lazar, Alban Echevin, Vincent Krahmann, Gerd Chaigneau, Alexis Gourcuff, Claire Wade, Malick Faye, Saliou Estrade, Philippe Capet, Xavier Mortier, Laurent Brehmer, Patrice Schuette, Florian Karstensen, Johannes |
author_sort |
Kolodziejczyk, Nicolas |
title |
Subsurface fine scale patterns in an anticyclonic eddy off Cap-Vert peninsula observed from glider measurements |
title_short |
Subsurface fine scale patterns in an anticyclonic eddy off Cap-Vert peninsula observed from glider measurements |
title_full |
Subsurface fine scale patterns in an anticyclonic eddy off Cap-Vert peninsula observed from glider measurements |
title_fullStr |
Subsurface fine scale patterns in an anticyclonic eddy off Cap-Vert peninsula observed from glider measurements |
title_full_unstemmed |
Subsurface fine scale patterns in an anticyclonic eddy off Cap-Vert peninsula observed from glider measurements |
title_sort |
subsurface fine scale patterns in an anticyclonic eddy off cap-vert peninsula observed from glider measurements |
publisher |
Amer Geophysical Union |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00450/56162/57708.pdf https://archimer.ifremer.fr/doc/00450/56162/57709.pdf https://doi.org/10.1029/2018JC014135 https://archimer.ifremer.fr/doc/00450/56162/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2018-09 , Vol. 123 , N. 9 , P. 6312-6329 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/603521/EU//PREFACE https://archimer.ifremer.fr/doc/00450/56162/57708.pdf https://archimer.ifremer.fr/doc/00450/56162/57709.pdf doi:10.1029/2018JC014135 https://archimer.ifremer.fr/doc/00450/56162/ |
op_rights |
2018 American Geophysical Union. All rights reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2018JC014135 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
9 |
container_start_page |
6312 |
op_container_end_page |
6329 |
_version_ |
1766127997868310528 |