30 





26 



- 24 - 



UJ 

 CO 

 LU 



z 

 < 



20 - 



16 - 



Q 

 UJ 

 > 



12 - 



O 

 CO 



if) 8 



4 - 







24 



26 28 30 32 



SALINITY. %o 



34 



Figure 2-5, Dissolved Mn vs. salinity in Narragansett Bay, 

 in the Summer of 1973. 



Dissolved copper and manganese (along with O-,, nutrients and other metals) 

 were measured in the waters of Narragansett Bay in the Spring of 1977 by the 

 Narragansett Bay Study Group (in preparation). At this time of year, 

 manganese was found to be nearly conservative, showing no surface water 

 depletion and only a small deep water enrichment. The contrast between 

 manganese behavior in the spring and summer probably reflects slower 

 oxidative precipitation, slower benthic fluxes, and more rapid flushing of the 

 Bay under springtime conditions of lower temperatures and higher runoff. 



22 



