NO A A PROFESSIONAL PAPER 11 



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Nov Dec Jan Feb Mar Apr MayJun Jul Aug Sep Oct 



Observaf ions 

 in 1976 



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Smoothed Range of Values 



Annual 

 Trend 



Cruise Average 



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Range of Values 

 for the Cruise 



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Long Island Shelf 



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FIGURE 6-6. — Dissolved oxygen levels in bottom waters (>20 m) and vertical density stratification surface-subpycnocline a, difference) of Long Island 

 shelf waters, 1976 and historical record. Historical data from EDIS/NODC and WHOI (1961 publ.); 1975-76 cruise data from NMFS/SHL and 

 ERL/AOML. 



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