FIGURE 5-1. RADIATION BALANCE IN THE NORTHERN HEMISPHERE AND AVERAGE OCEAN 

 SURFACE TEMPERATURES. (adapted from m. g. gross, oceanography, second edition, 



CHARLES E. MERRILL PUBLISHING COMPANY, 1971, PAGE 73.) 



< 



Z Q 



O Qi 



^ i^ 



< °- 



< u 



oi ;:> 



o 



< 



=) 



z 

 < 



LLI 

 U 

 O 



u 



I— 

 < 

 a: 



UJ 



5 



TROPICS 



600 



^ SURPLUS \Y 



400 - OUTGOING RADIATION 



200 



20 



10 



1 



INSOLATION 



CLIMATIC ZONES 

 SUBTROPICS SUBPOLAR POLAR 



I 1 r 



1 I I I 



DEFICIT 



INSOLATION 



NORTHERN 

 HEMISPHERE 



SOUTHERN 

 HEMISPHERE 



INITIAL FREEZING POINT OF 



— SEAWATER Sx 32%. 



J \ 



10° 20° 30° 40° 50° 60° 80° 



LATITUDE 



46 



