17- 



l«- 

 15- 

 14- 

 13 



13 

 II 

 10 



9 

 B- 



o 



+ 1 STANDARD 

 DEVIATION 



® 



© 



fl S 

 TIME 



1981 



D J-M R-J J-S 0-D 81 80 



17 



IB- 



15- 



M 



13- 



12- 



11 



10- 

 9- 

 8- 

 7- 

 6- 

 5- 

 4- 

 3- 

 3 



+ 1 STANDARD 

 DEVIATION 



J F M fl M J J R S N J-M R-J J-S 0-0 80-81 



TIME 



b. 1980 plus 1981 



Figure B17. Monthly, seasonal, and annual mean and standard 

 deviation of wave period for gage 620 



B69 



