The Brazil current cyclonic meandering and shelf-slope water exchanges at 27°S–31°S

Amorim, João Pedro M.; Silveira, Ilson C.A. da; Borges-Silva, Milton; Souza-Neto, Pedro W.M.; Bernardo, Piero S.; Dottori, Marcelo; Belo, Wellington C.; Martins, Renato P.; Biló, Tiago C.

doi:10.1016/j.dsr.2024.104276

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The Brazil current cyclonic meandering and shelf-slope water exchanges at 27°S–31°S

2024
By Amorim, João Pedro M. ; Silveira, Ilson C.A. da ; Borges-Silva, Milton ; ...
Source: Deep Sea Research Part I: Oceanographic Research Papers, 206, 104276

[PDF-2.42 MB]

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Journal Title:

Deep Sea Research Part I: Oceanographic Research Papers
Personal Author:

Amorim, João Pedro M. ; Silveira, Ilson C.A. da ; Borges-Silva, Milton ; Souza-Neto, Pedro W.M. ; Bernardo, Piero S. ; ... More +

Amorim, João Pedro M. ; Silveira, Ilson C.A. da ; Borges-Silva, Milton ; Souza-Neto, Pedro W.M. ; Bernardo, Piero S. ; Dottori, Marcelo ; Belo, Wellington C. ; Martins, Renato P. ; Biló, Tiago C. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMAS (Cooperative Institute for Marine and Atmospheric Studies)

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMAS (Cooperative Institute for Marine and Atmospheric Studies) Less -
Description:

The Brazil Current (BC) experiences intense mesoscale activity from its origin on the northeastern Brazilian coast till it reaches the Brazil-Malvinas Confluence. The BC meandering behavior near the Cape Santa Marta (27°S – 31°S), has not been well described in the literature. In this study, in situ observations and satellite images are used to describe the BC meanders and cyclonic eddies near the cape. The results obtained from two Lowered Acoustic Doppler Current Profilers (LADCP) sections show that these structures are surface intensified but extend through the whole water column. Conductivity Temperature and Depth (CTD) profiles show evidence of coastal water trapping inside an eddy. Altimeter data show two hot spots of cyclones, one at 28.5°S and the other at 30.5°S, with an average of ∼5 and 7 eddies per year, respectively. The eddies generated on both sites have a mean lifetime of 37 days, and no significant differences were found between their surface properties. Satellite images of chlorophyll show that coastal water horizontal advection is a recurrent phenomenon in these eddies, imprinting an eddy stirring signal into their average composites. Furthermore, using Empirical Orthogonal Functions to analyze the BC flow in a mooring line, we observed that the mesoscales meanders are responsible for explaining at least 1/3 of the flow variability in this area.
Source:

Deep Sea Research Part I: Oceanographic Research Papers, 206, 104276
DOI:

https://doi.org/10.1016/j.dsr.2024.104276
ISSN:

0967-0637
Format:

PDF
Publisher:

Elsevier BV
Document Type:

Journal Article
Rights Information:

Accepted Manuscript
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:b409e81a85c390a3a4584c9821c2620e1b6c2da4f158e7867ed964f737f9cabc
Download URL:

https://repository.library.noaa.gov/view/noaa/61132/noaa_61132_DS1.pdf
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The Brazil current cyclonic meandering and shelf-slope water exchanges at 27°S–31°S

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