if) 



UJ 



UJ 



o 



400 



300 



200 



100 







300 



200 



100 







200- 



100- 



0- 



-100 H 



200 



100 







-100 



CASCO BAY 120' 





1 — r 



1 — \ — r 



/' / 



\. 



CASCO BAY 140** 



- — /976 

 --I975 

 1974 





\ 



y^N 4 * v 





>/ 



^•T r^Cv < 



CASCO BAY 160*' 





NANTUCKET IS. ISC'* 



/ 



■ V. -- " ^ •' ■ ■'a .^_ • ■ •...• ■• ' v^x ^ ^ - X. ' 



■^'^•\..../^.v;a 



j|f|m|a|m|j|j|a|s|o|n|d 



MONTH 



Figure 18. .1.— Annual march of Shelf Water front positions relative to the 2l)0-m isobath (positive is seaward), 1974-76, along standard bearing 



lines for New England and the Middle Atlantic regions. 



309 



