Ocean Temperatures along the West Coast of North America. 



277 



the wind was so related to the coast that upwelling would be expec- 

 ted. Now if the bottom water rises, and at the same time flows to- 

 ward the coast, we would expect to find colder water near the coast 

 than that farther out at the same level, as cold water is rising to a 



M/LES 



2.5 



Course to San D/'eo^o Harbor 

 From a Point 9 Miles West 

 From 6:50A.M,to I.-IO P.M., 

 IQII 



Fig. 17. 



region of a normally higher temperature. Therefore, the upward de- 

 flection of the isotherms shown by the diagrams agrees with what 

 would be expected from the theory. 



The peculiar shape of the isotherms near the surface (Fig. 17) is 

 explained as follows. The observations were commenced at 6:50 A.M. 

 when the surface temperature is normally below the daily average. A 

 rise in temperature at a given place would continue till about 2 P. M., 



