The intermediate depth circulation of the western South Atlantic

Details The intermediate depth circulation of the western South Atlantic The intermediate depth circulation of the western South Atlantic

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3329b&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 21, p. 3329-3332

Physics

17

Oceanography: Physical: Currents, Oceanography: Physical: General Circulation, Oceanography: Physical: Western Boundary Currents

Scientific paper

The subsurface oceanic circulation is an important part of the Earth climate system. Subsurface currents traditionally are inferred indirectly from distributions of temperature and dissolved substances, occasionally supplemented by current meter measurements. Neutrally-buoyant floats however, now enable us to obtain for the first time directly measured intermediate depth velocity fields over large areas such as the western South Atlantic. Here, our combined data set provides unprecedented observations and quantification of key flow patterns, such as the Subtropical Gyre return flow (12 Sv; 1Sverdrup=106m3s-1), its bifurcation near the Santos Plateau and the resulting continuous narrow and swift northward intermediate western boundary current (4 Sv). This northward flowing water passes through complex equatorial flows and finally enters into the North Atlantic.

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