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Subtidal velocity correlation scales on the northern California shelf

ScholarsArchive at Oregon State University

Field Value
Title Subtidal velocity correlation scales on the northern California shelf
Names Dever, Edward P. (creator)
Date Issued 1997-04-15 (iso8601)
Note copyrighted by American Geophysical Union
Abstract Along- and cross-shelf correlation scales of subtidal cross-shelf (u) and alongshelf
(ν) velocities are estimated using moored records from several field programs over
the northern California shelf. Over record lengths of 4-6 months, along-shelf correlation
scales of ν are greater than maximum mooring separations (60 km). In the cross-shelf
direction ν, is generally correlated between the 60 and 130 m isobaths (10-15 km
separation). Along-shelf correlation scales of u are much smaller than those of ν and are
often not resolved by minimum mooring separations. Time series between November 1988
and May 1989 do resolve along-shelf correlation scales of near-surface u and indicate that
they are 15-20 km. During this time the along-shelf correlation scale of near-surface u
shows variability on a monthly scale. It is generally long (30 km or more) when correlation
of u with wind stress is high and short (15 km or less) when correlation with wind stress is
low. On at least one occasion, short along-shelf correlation scales coincide with the
intrusion of an offshore mesoscale feature onto the shelf. Cross-shelf correlation scales of
u are resolved for typical mooring separations. In general, u is correlated between the 90
and 130 m isobaths (7-13 km separation) and between the 60 and 90 m isobaths (~5 km).
Genre Article
Identifier Dever, E. P., (1997). Subtidal velocity correlation scales on the northern California shelf. J. Geophys. Res., 102, C4, 8555-8571.

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