MP 



-4 







11 



18 



10. 



10. 



10. 



10 



.5, 



SALINITY 



n P . -s. 1 



10 



10. 



10 



10. 



10. 



1. 



Figure 3. The correlation (r) of original variables and the first two 

 principal components from vertical profiles of current velocity and 

 salinity at stations in the lower estuary in 1977. Velocities or sa- 

 linities that correlate with a common component tend to co-vary. On 

 this basis components were labelled "surface" ( o ) or "bottom" (A ) . 

 Similar results were obtained from analysis of 1978 salinity data. 



175 



