Altimetry-Based Diagnosis of Deep-Reaching Sub-Mesoscale Ocean Fronts
Recent studies demonstrate that energetic sub-mesoscale fronts (10–50 km width) extend in the ocean interior, driving large vertical velocities and associated fluxes. However, diagnosing the dynamics of these deep-reaching fronts from in situ observations remains challenging because of the lack of i...
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ftarchimer:oai:archimer.ifremer.fr:75666 2023-05-15T13:47:36+02:00 Altimetry-Based Diagnosis of Deep-Reaching Sub-Mesoscale Ocean Fronts Siegelman, Lia Klein, Patrice Thompson, Andrew F. Torres, Hector S. Menemenlis, Dimitris 2020-09 application/pdf https://archimer.ifremer.fr/doc/00645/75666/76532.pdf https://doi.org/10.3390/fluids5030145 https://archimer.ifremer.fr/doc/00645/75666/ eng eng MDPI AG https://archimer.ifremer.fr/doc/00645/75666/76532.pdf doi:10.3390/fluids5030145 https://archimer.ifremer.fr/doc/00645/75666/ info:eu-repo/semantics/openAccess restricted use Fluids (2311-5521) (MDPI AG), 2020-09 , Vol. 5 , N. 3 , P. 145 (23p.) altimetry finite-size Lyapunov exponent ocean dynamics sub-mesoscale text Publication info:eu-repo/semantics/article 2020 ftarchimer https://doi.org/10.3390/fluids5030145 2021-09-23T20:35:46Z Recent studies demonstrate that energetic sub-mesoscale fronts (10–50 km width) extend in the ocean interior, driving large vertical velocities and associated fluxes. However, diagnosing the dynamics of these deep-reaching fronts from in situ observations remains challenging because of the lack of information on the 3-D structure of the horizontal velocity. Here, a realistic numerical simulation in the Antarctic Circumpolar Current (ACC) is used to study the dynamics of submesocale fronts in relation to velocity gradients, responsible for the formation of these fronts. Results highlight that the stirring properties of the flow at depth, which are related to the velocity gradients, can be inferred from finite-size Lyapunov exponent (FSLE) at the surface. Satellite altimetry observations of FSLE and velocity gradients are then used in combination with recent in situ observations collected by an elephant seal in the ACC to reconstruct frontal dynamics and their associated vertical velocities down to 500 m. The approach proposed here is well suited for the analysis of sub-mesoscale-resolving datasets and the design of future sub-mesoscale field campaigns. Article in Journal/Newspaper Antarc* Antarctic Elephant Seal Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic The Antarctic Fluids 5 3 145 |
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 |
altimetry finite-size Lyapunov exponent ocean dynamics sub-mesoscale |
spellingShingle |
altimetry finite-size Lyapunov exponent ocean dynamics sub-mesoscale Siegelman, Lia Klein, Patrice Thompson, Andrew F. Torres, Hector S. Menemenlis, Dimitris Altimetry-Based Diagnosis of Deep-Reaching Sub-Mesoscale Ocean Fronts |
topic_facet |
altimetry finite-size Lyapunov exponent ocean dynamics sub-mesoscale |
description |
Recent studies demonstrate that energetic sub-mesoscale fronts (10–50 km width) extend in the ocean interior, driving large vertical velocities and associated fluxes. However, diagnosing the dynamics of these deep-reaching fronts from in situ observations remains challenging because of the lack of information on the 3-D structure of the horizontal velocity. Here, a realistic numerical simulation in the Antarctic Circumpolar Current (ACC) is used to study the dynamics of submesocale fronts in relation to velocity gradients, responsible for the formation of these fronts. Results highlight that the stirring properties of the flow at depth, which are related to the velocity gradients, can be inferred from finite-size Lyapunov exponent (FSLE) at the surface. Satellite altimetry observations of FSLE and velocity gradients are then used in combination with recent in situ observations collected by an elephant seal in the ACC to reconstruct frontal dynamics and their associated vertical velocities down to 500 m. The approach proposed here is well suited for the analysis of sub-mesoscale-resolving datasets and the design of future sub-mesoscale field campaigns. |
format |
Article in Journal/Newspaper |
author |
Siegelman, Lia Klein, Patrice Thompson, Andrew F. Torres, Hector S. Menemenlis, Dimitris |
author_facet |
Siegelman, Lia Klein, Patrice Thompson, Andrew F. Torres, Hector S. Menemenlis, Dimitris |
author_sort |
Siegelman, Lia |
title |
Altimetry-Based Diagnosis of Deep-Reaching Sub-Mesoscale Ocean Fronts |
title_short |
Altimetry-Based Diagnosis of Deep-Reaching Sub-Mesoscale Ocean Fronts |
title_full |
Altimetry-Based Diagnosis of Deep-Reaching Sub-Mesoscale Ocean Fronts |
title_fullStr |
Altimetry-Based Diagnosis of Deep-Reaching Sub-Mesoscale Ocean Fronts |
title_full_unstemmed |
Altimetry-Based Diagnosis of Deep-Reaching Sub-Mesoscale Ocean Fronts |
title_sort |
altimetry-based diagnosis of deep-reaching sub-mesoscale ocean fronts |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://archimer.ifremer.fr/doc/00645/75666/76532.pdf https://doi.org/10.3390/fluids5030145 https://archimer.ifremer.fr/doc/00645/75666/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Elephant Seal |
genre_facet |
Antarc* Antarctic Elephant Seal |
op_source |
Fluids (2311-5521) (MDPI AG), 2020-09 , Vol. 5 , N. 3 , P. 145 (23p.) |
op_relation |
https://archimer.ifremer.fr/doc/00645/75666/76532.pdf doi:10.3390/fluids5030145 https://archimer.ifremer.fr/doc/00645/75666/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3390/fluids5030145 |
container_title |
Fluids |
container_volume |
5 |
container_issue |
3 |
container_start_page |
145 |
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1766247519857147904 |