Velocity structure of North Brazil Current rings

W. Douglas Wilson, William E. Johns, Silvia L. Garzoli

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

High-resolution shipboard surveys of four North Brazil Current rings are presented, which are the first such dedicated surveys to be made of these features. Of the four rings surveyed, three fundamentally different types of ring structures are found: (1) a shallow, surface-trapped structure with velocities confined to the top 200 m (two rings), (2) a deep-reaching structure with significant swirl velocities (∼0.2 m/s) extending to 2000 m (one ring), and (3) a thermocline-intensified structure with almost no detectable surface signature (one ring). The results of this study indicate that North Brazil Current rings can have highly variable vertical structures, and that assessing their overall role in cross gyre exchange in the tropical Atlantic will require a careful combination of remote sensing and in-situ observations.

Original languageEnglish (US)
Article number1273
JournalGeophysical Research Letters
Volume29
Issue number8
DOIs
StatePublished - Apr 15 2002

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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