New York 



SURFACE ISOTHERMS -"C 



'■Ss, 



NK 



.lOOfms 



Nl 



.NH 



NG 



40''N 



— 35° 



Charleston 



3 



►SJ 



iSH 



SI 



SK 



'SL 



30° 



I Miami; 



^SC 



5A 



25°N 



Figure 1. 



80°W 75° 



Standard ART flight trackline, July 1970-June 1976 



70°W 



