OTHER METEOROLOGICAL INSTRl MENTS 



53 



5 6o ° 



u. 



,_- 500 



X 



£ "00 



X 



300 



200 

 100 



1000 



900 



800 



700 



5 600 

 n. 



I-' 500 



x 



o 



in 400 



x 



300 



200 



100 



-20 -10 O 



M-M„ 



10 20 30 40 



Figure 4. Representative nonstandard M curves from the Massachusetts coast. 





 M-M„ 



-10 



-30 -20 -10 



M-M„ 



Figure 5. M curves from the Massachusetts coast showing strong ducts. 



1200 



310 320 330 340 



320 330 340 350 



M 



320 330 340 350 



Figure 6. M curves from New Zealand, east coast near Cook Strait. 



