Subsurface Fine-Scale Patterns in an Anticyclonic Eddy Off Cap-Vert Peninsula Observed From Glider Measurements
Glider measurements acquired along four 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 sh...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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AGU (American Geophysical Union)
2018
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Online Access: | https://oceanrep.geomar.de/id/eprint/44369/ https://oceanrep.geomar.de/id/eprint/44369/1/Kolodziejczyk_Krahmann_2018.pdf https://oceanrep.geomar.de/id/eprint/44369/2/Kolodziejczyk_Krahmann_2018_suppl.pdf https://doi.org/10.1029/2018JC014135 |
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ftoceanrep:oai:oceanrep.geomar.de:44369 2023-05-15T17:30:49+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 Schütte, Florian Karstensen, Johannes 2018-09-08 text https://oceanrep.geomar.de/id/eprint/44369/ https://oceanrep.geomar.de/id/eprint/44369/1/Kolodziejczyk_Krahmann_2018.pdf https://oceanrep.geomar.de/id/eprint/44369/2/Kolodziejczyk_Krahmann_2018_suppl.pdf https://doi.org/10.1029/2018JC014135 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/44369/1/Kolodziejczyk_Krahmann_2018.pdf https://oceanrep.geomar.de/id/eprint/44369/2/Kolodziejczyk_Krahmann_2018_suppl.pdf Kolodziejczyk, N., Testor, P., Lazar, A., Echevin, V., Krahmann, G. , Chaigneau, A., Gourcuff, C., Wade, M., Faye, S., Estrade, P., Capet, X., Mortier, L., Brehmer, P., Schütte, F. and Karstensen, J. (2018) Subsurface Fine-Scale Patterns in an Anticyclonic Eddy Off Cap-Vert Peninsula Observed From Glider Measurements. Open Access Journal of Geophysical Research: Oceans, 123 (9). pp. 6312-6329. DOI 10.1029/2018JC014135 <https://doi.org/10.1029/2018JC014135>. doi:10.1029/2018JC014135 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2018 ftoceanrep https://doi.org/10.1029/2018JC014135 2023-04-07T15:41:22Z Glider measurements acquired along four 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 northwest toward the Cape Verde islands. At depth, between 100 and –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- to 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Journal of Geophysical Research: Oceans 123 9 6312 6329 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Glider measurements acquired along four 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 northwest toward the Cape Verde islands. At depth, between 100 and –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- to 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 Schütte, Florian Karstensen, Johannes |
spellingShingle |
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 Schütte, Florian Karstensen, Johannes Subsurface Fine-Scale Patterns in an Anticyclonic Eddy Off Cap-Vert Peninsula Observed From Glider Measurements |
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 Schütte, 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 |
AGU (American Geophysical Union) |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/44369/ https://oceanrep.geomar.de/id/eprint/44369/1/Kolodziejczyk_Krahmann_2018.pdf https://oceanrep.geomar.de/id/eprint/44369/2/Kolodziejczyk_Krahmann_2018_suppl.pdf https://doi.org/10.1029/2018JC014135 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/44369/1/Kolodziejczyk_Krahmann_2018.pdf https://oceanrep.geomar.de/id/eprint/44369/2/Kolodziejczyk_Krahmann_2018_suppl.pdf Kolodziejczyk, N., Testor, P., Lazar, A., Echevin, V., Krahmann, G. , Chaigneau, A., Gourcuff, C., Wade, M., Faye, S., Estrade, P., Capet, X., Mortier, L., Brehmer, P., Schütte, F. and Karstensen, J. (2018) Subsurface Fine-Scale Patterns in an Anticyclonic Eddy Off Cap-Vert Peninsula Observed From Glider Measurements. Open Access Journal of Geophysical Research: Oceans, 123 (9). pp. 6312-6329. DOI 10.1029/2018JC014135 <https://doi.org/10.1029/2018JC014135>. doi:10.1029/2018JC014135 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
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1766127916710625280 |