Mixing and Finestructure Processes in a Coastal Jet During OPTOMA-21
1991
Washburn, Libe
High resolution tow-yo observations obtained during the OPTOMA21 cruise are used to examine finestructure and microstructure processes in a strong coastal jet which was observed off the coast of Northern California in July, 1986. Results from a combined CTD and XBT survey reveal that the jet is baroclinic and has geostrophic velocity field extending to at least 500 m. The jet has a horizontal scale of about 40 km and is readily identified in SST imagery because it entrains cold upwelled water from the coastal region and advects it far off shore. The width of the thermal signature at the surface is 15-20 km, much smaller than the width of the velocity signature. Analysis of Reinecker and Mooers (1989) found that the jet is embedded in a large scale eddy field and is located between a pair of eddies, one cyclonic and the other anti- cyclonic.
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