Q b = Back radiation from the sea surface. This term 

 represents the long-wave radiation returned to the atmosphere 

 from the surface of the ocean and is a function of the tempera- 

 ture of sea surface, the cloudiness, and the humidity of the air 

 over the ocean. 



Q ■ = Amount of heat used locally to melt any ice that 

 may be present. This term may be negative and hence repre- 

 sent the heat given off when sea water is frozen. 



Q - Heat lost by evaporation from the sea surface. This 

 term may also include the heat gained by condensation of water 

 on the sea surface, though this effect is usually small. 



Q h = Convection of sensible heat from the sea to the 

 atmosphere. 



Q = Net amount of heat which by currents or processes 

 of mixing is brought into the region. 



Q e = Amount of heat used locally to increase the tempera- 

 ture of the sea water. 



The bathythermo grams provide the necessary data for the 

 computation of the term(? e . Since this term represents the 

 heat used in changing the temperature of the water, it is 

 necessary to determine the change in the relative heat content 

 of the surface layers. The evaluation of this term Q e involves 

 the averaging of the temperatures from bathythermograms 

 for each month for depths down to 450 feet. The resulting 

 average temperature-depth curve for each month is shown 

 in figure 1 1 . 



temperature (degress Fafirt 

 30 - .35 



sU^HflRBMHuBl 



/* %, 



FIGURE 11. Average vertical temperature structure observed during December (A), January (B), and February (C), 

 between 66.5° and 68.0° S and 105.0° and 112.0° W (see plot of area). 



