values for these corrections are applied, the following equation 

 results ; 



Qb=0.94[eff 0^(1-0.0083 C)] ik) 



In this expression Qt) is the average back radiation in 

 g. cal. cmr^ minr-'- and C is the mean cloudiness in percent. 

 Just as in the incoming -radiation, for a finite period of time 

 it is necessary to multiplty Q^ by the period t expressed in 

 minutes . 



c. Change in temperature with depth due to absorption 

 of radiation 



Subtracting Q^ from Q^^^ will yield the amount 

 of heat available for heating the oceans and for exchange with 

 the atmosphere. To proceed with the investigation it was 

 necessary to make two assumptions: (1) for sufficiently short 

 period of time the processes of heating the water and of exchange 

 of heat between ocean and atmosphere may be considered mutually 

 exclusive processes and may be computed as such, and (2) each 

 layer radiates in proportion to the radiation received. 



Neglecting for the present the process of exchange with 

 the atmosphere, therefore, we may write an expression for the 

 temperature change at any depth, namely, 



where 



ATr(Z)= T.eniperature change at depth z, 



C = ^specific heat oC water at constant pressure 

 (approximately 0.93) 



7 



