Statistics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3518604i&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 18, CiteID L18604
Statistics
1
Oceanography: General: Descriptive And Regional Oceanography, Oceanography: Physical: Eastern Boundary Currents, Oceanography: General: Coastal Processes, Oceanography: Physical: Eddies And Mesoscale Processes
Scientific paper
Westward transport processes off central California are quantified by exit time statistics for RAFOS floats launched at mid-depths (275-375 m). The random displacement model in the diffusion limit was used to interpret results. The alongshore-averaged westward motion of floats represented inhomogeneous eddy diffusion interspersed with short-duration advective motions. The across-shore diffusion coefficient grew as a power law with distance from the coastline (the power exponent was close to one). This is evidence for offshore growth of eddy kinetic energy and may be explained through flow barotropization accompanied by a quasi-geostrophic turbulent regime. Typical values of the float drift velocity were about 1.8-2 cm/s but, offshore, drift velocities were as high as 4-6 cm/s during the upwelling season. Between 150 and 250 km from shore, a transition zone between nearshore and offshore was clearly identified in spring but was either very narrow or undetectable in other seasons.
Collins Charles Aloysius
Eremeev Valery N.
Ivanov Leonid M.
Margolina T. M.
Piterbarg L. I.
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