SALINITY, %o 
Figure 2*5. Dissolved Mn vs. salinity in Narragansett Bay, 
in the Summer of 1973. 
Dissolved copper and manganese (along with 0*,, 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. 
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