77 



FIGURE IV.1.18 SEASONAL VARIATION IN CLIMATE AROUND 

 THE ESTUARINE ZONE 



SAN DIEGO 



POBTL^NO 



PUERTO RICO & VIRGIN ISLANDS 



Portland, Maine 





8 



Baltimore, Maryland 



i" 



I 3 3 4 S « 7 • • ion 12 

 MONTH 



S8 

 o -' 



S 8' 



X . 



< ! 



! 'l2]4S«7t»IOI1l} 

 HONTH 



I" 



a »l I 



* l>34St7lfiaill> 



