Boundary Processes in the Nutrient-Bearing Stratum 

 of the North Atlantic 



Csanady, G.T. 



$151,000 



Old Dominion University 



Department of Oceanography 



C: 804-440-4285 



The project objective is understanding (1) the physical basis of the North Atlantic nutrient cycle (i.e., circulation, 

 mass balance, and nutrient regeneration in the nutrient-bearing upper thermocline layers) and (2) the role in the 

 cycle of physical processes at the continental margin off North America. Key margin processes under study are 

 shelf-edge exchange, deposition over the continental slope, and upwelling under the western boundary current. 

 Work involves (1) modeling circulation in the isopycnal layers of the upper thermocline from subduction through 

 western boundary current transport, (2) modeling shelf-edge exchange and western boundary upwelling, and (3) 

 model-observation comparison and analysis and interpretation of data collected in the Shelf Edge Exchange 

 Processes (SEEP) Program experimental series. This work is part of the coordinated interdisciplinary studies on 

 continental margin processes important in the global biogeochemical cycle. 



Collection and Simulation Analysis of Moored Fluorometer Time Series 

 from the Mid-Atlantic and South Atlantic Bights 



Walsh, J.J. 



$150,000 



University of South Florida 



Department of Marine Science 



C: 813-893-9164 



The objective of this project is to determine the quantity of marine primary production and energy- related particles 

 derived from the land boundary, the fraction of this material retained in the inner shelf, and the fraction exported to 

 the open sea, including the time scales for the processes in the Mid-Atlantic and South Atlantic Bights. The ap- 

 proach uses a basic model that will be enhanced by new physical and biological submodels and in which Eulerian 

 measurements may be transformed into a Lagrangian field. 



Coastal Ocean Margins Program A9 December 1988 



