Modeling the Offshore Export of Subantarctic Shelf Waters From the Patagonian Shelf

It has been suggested that the Subtropical Shelf Front (STSF) could be a preferential site for the detrainment of Subantarctic Shelf Water (SASW) and related planktonic shelf species onto the open SW Atlantic Ocean. The offshore detrainment of SASW and planktonic shelf species might be an exportatio...

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Detalles Bibliográficos
Publicado: 2018
Materias:
Brazil-Malvinas Confluence
offshore detrainment
Subantarctic Shelf Waters
Subtropical Shelf Front
SW Atlantic Ocean
abundance
hydrodynamics
Lagrangian analysis
numerical model
offshore application
open ocean
seasonality
shelf dynamics
simulation
subtropical region
Argentina
Atlantic Ocean
Brazil
Patagonian Shelf
Uruguay
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699275_v123_n7_p4491_Franco
http://hdl.handle.net/20.500.12110/paper_21699275_v123_n7_p4491_Franco
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_21699275_v123_n7_p4491_Franco
record_format dspace
spelling paper:paper_21699275_v123_n7_p4491_Franco2025-07-30T19:10:17Z Modeling the Offshore Export of Subantarctic Shelf Waters From the Patagonian Shelf Brazil-Malvinas Confluence offshore detrainment Subantarctic Shelf Waters Subtropical Shelf Front SW Atlantic Ocean abundance hydrodynamics Lagrangian analysis numerical model offshore application open ocean seasonality shelf dynamics simulation subtropical region Argentina Atlantic Ocean Brazil Brazil-Malvinas Confluence Patagonian Shelf Uruguay It has been suggested that the Subtropical Shelf Front (STSF) could be a preferential site for the detrainment of Subantarctic Shelf Water (SASW) and related planktonic shelf species onto the open SW Atlantic Ocean. The offshore detrainment of SASW and planktonic shelf species might be an exportation mechanism, affecting the population abundances of fishing resources in Argentina, Uruguay, and Southern Brazil. In this study, we characterize for the first time the 3-D structure of the STSF and the main routes of offshore export of SASW from the Patagonian shelf during austral summer (summer and early fall) and winter (winter and early spring) by using numerical hydrodynamical model results and Lagrangian tracking simulations of neutrally buoyant floats. The transport of SASW toward the open ocean is ~1 Sv (1 Sv = 106 m3/s) during summer and ~0.8 Sv during winter. SASW are exported offshore mainly near the Brazil-Malvinas Confluence region during both seasons. The STSF appears to act as an important retention mechanism for the plankton over the inner and middle shelf mainly during late summer and early fall. Our findings could explain the life cycle of distinct fish species that are distributed in the region, as well as the population abundance variability of such species. ©2018. American Geophysical Union. All Rights Reserved. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699275_v123_n7_p4491_Franco http://hdl.handle.net/20.500.12110/paper_21699275_v123_n7_p4491_Franco
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Brazil-Malvinas Confluence
offshore detrainment
Subantarctic Shelf Waters
Subtropical Shelf Front
SW Atlantic Ocean
abundance
hydrodynamics
Lagrangian analysis
numerical model
offshore application
open ocean
seasonality
shelf dynamics
simulation
subtropical region
Argentina
Atlantic Ocean
Brazil
Brazil-Malvinas Confluence
Patagonian Shelf
Uruguay
spellingShingle Brazil-Malvinas Confluence
offshore detrainment
Subantarctic Shelf Waters
Subtropical Shelf Front
SW Atlantic Ocean
abundance
hydrodynamics
Lagrangian analysis
numerical model
offshore application
open ocean
seasonality
shelf dynamics
simulation
subtropical region
Argentina
Atlantic Ocean
Brazil
Brazil-Malvinas Confluence
Patagonian Shelf
Uruguay
Modeling the Offshore Export of Subantarctic Shelf Waters From the Patagonian Shelf
topic_facet Brazil-Malvinas Confluence
offshore detrainment
Subantarctic Shelf Waters
Subtropical Shelf Front
SW Atlantic Ocean
abundance
hydrodynamics
Lagrangian analysis
numerical model
offshore application
open ocean
seasonality
shelf dynamics
simulation
subtropical region
Argentina
Atlantic Ocean
Brazil
Brazil-Malvinas Confluence
Patagonian Shelf
Uruguay
description It has been suggested that the Subtropical Shelf Front (STSF) could be a preferential site for the detrainment of Subantarctic Shelf Water (SASW) and related planktonic shelf species onto the open SW Atlantic Ocean. The offshore detrainment of SASW and planktonic shelf species might be an exportation mechanism, affecting the population abundances of fishing resources in Argentina, Uruguay, and Southern Brazil. In this study, we characterize for the first time the 3-D structure of the STSF and the main routes of offshore export of SASW from the Patagonian shelf during austral summer (summer and early fall) and winter (winter and early spring) by using numerical hydrodynamical model results and Lagrangian tracking simulations of neutrally buoyant floats. The transport of SASW toward the open ocean is ~1 Sv (1 Sv = 106 m3/s) during summer and ~0.8 Sv during winter. SASW are exported offshore mainly near the Brazil-Malvinas Confluence region during both seasons. The STSF appears to act as an important retention mechanism for the plankton over the inner and middle shelf mainly during late summer and early fall. Our findings could explain the life cycle of distinct fish species that are distributed in the region, as well as the population abundance variability of such species. ©2018. American Geophysical Union. All Rights Reserved.
title Modeling the Offshore Export of Subantarctic Shelf Waters From the Patagonian Shelf
title_short Modeling the Offshore Export of Subantarctic Shelf Waters From the Patagonian Shelf
title_full Modeling the Offshore Export of Subantarctic Shelf Waters From the Patagonian Shelf
title_fullStr Modeling the Offshore Export of Subantarctic Shelf Waters From the Patagonian Shelf
title_full_unstemmed Modeling the Offshore Export of Subantarctic Shelf Waters From the Patagonian Shelf
title_sort modeling the offshore export of subantarctic shelf waters from the patagonian shelf
publishDate 2018
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_21699275_v123_n7_p4491_Franco
http://hdl.handle.net/20.500.12110/paper_21699275_v123_n7_p4491_Franco
_version_ 1840322861048266752

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