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Summer
(August 15) zonal current
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velocity
in the equatorial Atlantic at
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33W
to a depth of 500m. The thick
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line
is the mixed layer base.
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These
cross-sections illustrate the
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Equatorial
Undercurrent and the
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nearsurface
tropical gyre between the
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Equator
and 10N. The structure of
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these
flows are more realistic in
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the
hybrid-coordinate HYCOM
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simulations.
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The
observed flow field was produced
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by
initializing the model with Levitus
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climatology,
shutting off thermo-
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dynamical
forcing, and running the
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model
for two weeks. Substantial
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transients
remained in the equatorial
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region,
resulting in the poor
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representation
of the undercurrent.
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