OCEAN TEMPEEATUSES 



393 



(y 3) for y in the exponential ve~ blV and adding the result to from 

 equation (156) gives the following approximate value of the tem- 

 perature in case the velocity of up welling is w [l-|-rcos (at ej] 



COS (at ,) 1 



rw Bb 1 (a l -{- a 2 



a cos c, -4- fc, sin e, ~| . 

 2 " 2 L \sinat 



a H-/C 2 



[A:, cos tj a sin Cj ~1 

 a 2 I /g ^ 



"2acosc, -4- fe sin to"! . 

 " 2 . si 

 T*a J 



cos e. 



sc, 2asinc, 



] 



, 

 COS 2 ^ e " 



(163) 



where 



tan Co = 



H-" 2 -^- 



+- 



(164) 



THEORETICAL REDUCTION OF THE SURFACE TEMPERATURE FOR EACH 

 MONTH IN THE SAN DIEGO REGION, DUE TO UPWELLING ; 

 AND COMPARISON WITH OBSERVATIONS 



The theoretical relation of ocean temperatures to time and depth 

 developed in pages 368-381 was found to agree well with observations 

 from 40 to 700 meters in the San Diego region. The theory developed 

 in pages 388-393 is valid for only the upper ten meters ; but no satis- 

 factory theory for the intermediate interval from 40 to 10 meters or 

 to the surface has been worked out. Now since the temperature reduc- 

 tion at the surface depends upon the upwelling in all three intervals, 

 it is necessary to estimate the reduction in this intermediate interval 

 for which we have no theory. A method of making this estimate is 

 included in the following plan of computing the theoretical tempera- 

 ture reduction at the surface. 



