OCEANOGRAPHER 



YAQUINA 



37 



CAYUSE 



Figure 16. Research vessels participating in CUE-1. 



c. The water in the coastal band is modified by heating, evaporation, 

 etc. and is mixed at the surface front (the one-sided surface convergence) 

 with the offshore surface water to form an intermediate water mass which 

 sinks and flows offshore along the base of the inclined frontal layer. This 

 water mass is conveniently identified by a temperature inversion and by 

 high suspended-particle content. 



d. During the upwelling season, semidiurnal internal tides progress 

 onshore. They are somehow dissipated in the coastal region. 



e. There are at least three major sources of vertical current shear 

 near the inclined frontal layer: the mean shear, the several-day shear, 

 and the semidiurnal shear. 



f. Frontal mixing and the subsequent offshore flow along the base 

 of the inclined frontal layer may play a significant role in the development 

 of undercurrents flowing toward the poles observed beneath the inclined 

 frontal layer. 



