Currents in Monterey Submarine Canyon.

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Author
Hollister, John Edward
Date
1975-09Advisor
Andrews, Robert S.
Paquette, Robert G.
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Show full item recordAbstract
Time series were obtained from two current meters near
bottom on one mooring in Monterey Submarine Canyon. These
records were analyzed to determine the general character of
the currents, the volume transport at different levels above
the canyon floor, the power spectral estimates of the up-canyon
and cross-canyon directional components, and the coherence
between directional components.
Current speed variations appeared as a series of peaks
occurring every 5 to 6 hr with maxima of 17 to 21 cm/sec.
Current directions oscillated with a discernible period of
about 12 hr. Currents 30 m above the bottom were aligned
nearly along the canyon axis; currents 60 m above the bottom
were nearly perpendicular to the canyon axis.
The spectral analysis indicated tides as a major driving
force of the deep currents, but also indicated the presence of
other forcing functions, possibly internal waves, with shorter
periods. The coherence between instruments was low, suggesting
the possible presence of a near-bottom boundary layer, or that
significant signal deterioration was caused by noise.
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