Topographic influences in the California current system

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Author
Chen, Ching-Yin
Date
1986-12Advisor
Haney, R.L.
Second Reader
Williams, R.T.
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Show full item recordAbstract
A ten-level primitive equation numerical model is used to study the influences of
the bottom topography in the California Current System. Five different numerical
experiments were integrated for 40 days after being initialized with a baroclinic alongshore
coastal jet representative of the observed coastal jet. By comparison with a flat
bottom case, in Experiments 1 and 3, in which the topographic slopes face westward or
northward, the topography appears to have stabilizing influences on the mean flow. In
Experiments 2 and 4, in which the topographic slopes face southward, the topographic B-effect appears to be strong enough so that these two cases have already reached a
quasi-steady state by 40 days. This is because in Experiments 2 and 4 the long, nondispersive
topographic Rossby waves are effective at transporting the eddy energy away
from the source region near the coast. The resulting new mean flow appears to be
stable.
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