where a and b are positive and where b is of such magnitude that v^ is 

 always positive. Then 



dv2 



- ^= cos 



(5) 



dx 



2an 2nx 



For arbitrary values of k, a and b equations (3) and (5) are plotted in 

 Figure 18. Regions of divergences are seen centered at x = O and x = L, 



3L 

 while convergences are seen centered at x =z L/2, and x = It is prob- 

 able that the southerly winds observed at the time of the BT stations 

 partake of equivalent variation while roughly steadily increasing in the 

 offshore direction. The wind observations are shown below. Since the wind 

 force was estimated on the Beaufort scale, a superposing of a relatively 

 small amptitude wind variation of the kind equivalent to Figure 18 can 

 be easily overlooked. 



Observed Winds at BT Stations 



Stations 



Observed Winds In 

 Beaufort Force 



Wind 

 Direction 



15 

 16 

 17 

 18 



15 Static 



iT 



^7 



56.5 



57.5 



n. miles 



\e 



0. 



61.5 

 61.0 



"eT.t 



59.0 400, 



500' 



10 



I 600 



Figure 17. E-W Vertical Temperature Section in degrees Fahrenheit. 



August 11, 1954. 



60 • 



