Circulation on the western South Atlantic continental shelf

2. Spring and autumn realistic simulations

I. D. Soares, Vassiliki H Kourafalou, T. N. Lee

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Buoyancy-driven currents are here investigated in a complex scenario, where two river plumes (the La Plata River and the Patos Lagoon plumes) occur in the vicinity of two opposing western boundary currents (the Malvinas and the Brazil currents). The study addresses the contrasting scenarios found during the austral spring and fall seasons, due to variations in river discharge, in wind stress, and in the boundary current transport. The winds blow preferably from the northeast during the spring and from the southwest during the fall. The Brazil Current transport is stronger during the spring, when the Brazil-Malvinas Confluence is displaced southward, and weaker during the fall when the confluence moves northward. The study is conducted as a series of numerical simulations which consider the river discharges, the tides, variable wind stress, and thermohaline fields which are realistic in terms of the Brazil-Malvinas Confluence. Our discussion focuses on the riverine water distribution in each season. The austral fall scenario shows coastally trapped plumes, and the spring scenario shows significant offshore removal, but our fall plumes are not too elongated and narrow as other authors found in the presence of constant winds, no tides, and no boundary currents, and our spring offshore removal is not as strong as found by others.

Original languageEnglish (US)
Article numberC04003
JournalJournal of Geophysical Research C: Oceans
Volume112
Issue number4
DOIs
StatePublished - Apr 8 2007

Fingerprint

Wind stress
autumn
Tides
confluence
continental shelves
Discharge (fluid mechanics)
continental shelf
boundary current
plume
Rivers
Brazil
river discharge
wind stress
rivers
plumes
tide
Buoyancy
simulation
river plume
western boundary current

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography

Cite this

Circulation on the western South Atlantic continental shelf : 2. Spring and autumn realistic simulations. / Soares, I. D.; Kourafalou, Vassiliki H; Lee, T. N.

In: Journal of Geophysical Research C: Oceans, Vol. 112, No. 4, C04003, 08.04.2007.

Research output: Contribution to journalArticle

@article{32324aab512c42b2badc194e10cba5bd,
title = "Circulation on the western South Atlantic continental shelf: 2. Spring and autumn realistic simulations",
abstract = "Buoyancy-driven currents are here investigated in a complex scenario, where two river plumes (the La Plata River and the Patos Lagoon plumes) occur in the vicinity of two opposing western boundary currents (the Malvinas and the Brazil currents). The study addresses the contrasting scenarios found during the austral spring and fall seasons, due to variations in river discharge, in wind stress, and in the boundary current transport. The winds blow preferably from the northeast during the spring and from the southwest during the fall. The Brazil Current transport is stronger during the spring, when the Brazil-Malvinas Confluence is displaced southward, and weaker during the fall when the confluence moves northward. The study is conducted as a series of numerical simulations which consider the river discharges, the tides, variable wind stress, and thermohaline fields which are realistic in terms of the Brazil-Malvinas Confluence. Our discussion focuses on the riverine water distribution in each season. The austral fall scenario shows coastally trapped plumes, and the spring scenario shows significant offshore removal, but our fall plumes are not too elongated and narrow as other authors found in the presence of constant winds, no tides, and no boundary currents, and our spring offshore removal is not as strong as found by others.",
author = "Soares, {I. D.} and Kourafalou, {Vassiliki H} and Lee, {T. N.}",
year = "2007",
month = "4",
day = "8",
doi = "10.1029/2006JC003620",
language = "English (US)",
volume = "112",
journal = "Journal of Geophysical Research: Oceans",
issn = "2169-9275",
publisher = "Wiley-Blackwell",
number = "4",

}

TY - JOUR

T1 - Circulation on the western South Atlantic continental shelf

T2 - 2. Spring and autumn realistic simulations

AU - Soares, I. D.

AU - Kourafalou, Vassiliki H

AU - Lee, T. N.

PY - 2007/4/8

Y1 - 2007/4/8

N2 - Buoyancy-driven currents are here investigated in a complex scenario, where two river plumes (the La Plata River and the Patos Lagoon plumes) occur in the vicinity of two opposing western boundary currents (the Malvinas and the Brazil currents). The study addresses the contrasting scenarios found during the austral spring and fall seasons, due to variations in river discharge, in wind stress, and in the boundary current transport. The winds blow preferably from the northeast during the spring and from the southwest during the fall. The Brazil Current transport is stronger during the spring, when the Brazil-Malvinas Confluence is displaced southward, and weaker during the fall when the confluence moves northward. The study is conducted as a series of numerical simulations which consider the river discharges, the tides, variable wind stress, and thermohaline fields which are realistic in terms of the Brazil-Malvinas Confluence. Our discussion focuses on the riverine water distribution in each season. The austral fall scenario shows coastally trapped plumes, and the spring scenario shows significant offshore removal, but our fall plumes are not too elongated and narrow as other authors found in the presence of constant winds, no tides, and no boundary currents, and our spring offshore removal is not as strong as found by others.

AB - Buoyancy-driven currents are here investigated in a complex scenario, where two river plumes (the La Plata River and the Patos Lagoon plumes) occur in the vicinity of two opposing western boundary currents (the Malvinas and the Brazil currents). The study addresses the contrasting scenarios found during the austral spring and fall seasons, due to variations in river discharge, in wind stress, and in the boundary current transport. The winds blow preferably from the northeast during the spring and from the southwest during the fall. The Brazil Current transport is stronger during the spring, when the Brazil-Malvinas Confluence is displaced southward, and weaker during the fall when the confluence moves northward. The study is conducted as a series of numerical simulations which consider the river discharges, the tides, variable wind stress, and thermohaline fields which are realistic in terms of the Brazil-Malvinas Confluence. Our discussion focuses on the riverine water distribution in each season. The austral fall scenario shows coastally trapped plumes, and the spring scenario shows significant offshore removal, but our fall plumes are not too elongated and narrow as other authors found in the presence of constant winds, no tides, and no boundary currents, and our spring offshore removal is not as strong as found by others.

UR - http://www.scopus.com/inward/record.url?scp=34250772336&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34250772336&partnerID=8YFLogxK

U2 - 10.1029/2006JC003620

DO - 10.1029/2006JC003620

M3 - Article

VL - 112

JO - Journal of Geophysical Research: Oceans

JF - Journal of Geophysical Research: Oceans

SN - 2169-9275

IS - 4

M1 - C04003

ER -