area proportional to the ten-fold increase in waste discharges (Garside et al . 

 1976). Within the inner Apex, the increased oxygen demand from the additional 

 urban carbon loading resulted in anoxia below the pycnocline (fig. 6) and a 

 reduction in surface layer oxygen to 60-70 percent of saturation. 



The similarity between simulated detrital carbon content in the inner Apex 

 (50-100 gm C m ~2) and the estimated POC content of the Ceratium bloom within 

 the Apex (80 gm C m~2) and the New Jersey midshelf (25-125 gm C m~2) in June 

 1976 suggests that the model response of anoxia to the additional urban carbon 

 loading is a realistic calculation of carbon-oxygen dynamics within the Apex. 

 These results, consistent with preliminary estimates of the assimilative capacity 

 (37 gm C m~ 2 ) of the New York Bight (Goldberg 1979), suggest that a critical 

 detrital carbon content of the water column is 50-100 gm C~2 for the New York 

 Bight. 



ACKNOWLEDGMENTS 



We thank Dr. G. Han for contributing results from the AOML diagnostic 

 circulation model and we thank D.A. Dieterle for computing assistance in 

 transformation of the transport fields and compilation of the data base. We 

 thank our colleagues, Drs . T. Whitledge, T.C. Malone, T.S. Hopkins, G.T. Rowe, 

 J. Vidal, F.G. Falkowski, and C.D. Wirick, for their data, insight, and numerous 

 helpful discussions. We should like to thank Dr. S.O. Howe for contributing 

 the numerical integration scheme used in the analysis. 



Financial support was provided by the Marine Ecosystems Analysis (MESA) 

 New York Bight Project of the National Oceanic and Atmospheric Administration 

 under Contract No. NA-80RAG-02206. Additional support was furnished under 

 Contract No. DE-AC02-76CH00016 with the Department of Energy to Brookhaven 

 National Laboratory with Dr. John J. Walsh as the principal investigator for 

 both contracts. 



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