Figure 1. Location of the study area. 



Ocean Sites 



Great Lakes 



Figure 2. Comparison of annual mean water levels at ocean and Great 

 Lakes sites. During rising lake levels the shores of the 

 Great Lakes may be submerged more in a 5- to 10-year period 

 than most ocean sites are in a century. Reversals in trend 

 reduce the longer term effects on the lakes, while ocean 

 sites are exposed to a slower but more persistent rate of 

 submergence. 



