By continuing the process, the amount of heat remaining at the 

 bottom of the second meter is obtained. 



^ -k, -k, ^ -(k,+k2) 



(9) 



where k2 is the extinction coefficient between the first and 

 second meters. The amount absorbed in the second meter is 



In general, the amount of heat absorbed in the nth layer is 



n-i n 



e.=o.e.=o] ^^^^ 



where ko=Oi 



Now, dividing the values of AQ^ for the various layers 

 by the thickness of the layers in centimeters and by Cp 

 will yield the temperature change In that layer in °C. 



A simpler method of computing temperature changes at the 

 different depths sometimes may be employed. When transparency 

 stations are occupied at sea, the data may be collected In 

 terms of the percentage of incoming radiation at the surface 

 that is left at any given depth. If Q^ is known, therefore, 

 the AQ^ for any layer may be computed directly from these data 

 rather than from the extinction coef ficients . 



