PRINCIPAL 



INVESTIGATOR(S) Zbigniew Kolber and Creighton D. Wirick 



Both at: Oceanographic and Atmospheric Sciences Division 



Brookhaven National Laboratory 

 Upton, NY 11973 



PROJECT TITLE FAST REPETITION RATE (FRR) FLUOROMETER FOR 



MAKING IN SITU MEASUREMENTS OF PRIMARY 

 PRODUCTIVITY 



AMOUNT OF FUNDING FY 1994: $312 K 



SUMMARY OF GOALS 



The goal of this project is to understand what controls photosynthesis on the continental 

 margin near Cape Hatteras. The scientific objectives of this project are: 



1) To quantify primary productivity in the Cape Hatteras region using FRR measurements of the 

 photosynthetic parameters. These measurements will be made from moored buoys and on 

 process cruises using moored, shipboard, profiling and towed FRR fluorometers of our design. 



2) To develop models that predict the dynamics of primary productivity from the temporal and 

 spatial distributions of the photosynthetic parameters. 



3) To continue development of the FRR methodology and instrumentation to increase our ability 

 to measure and understand the dynamics of primary production. 



This OMP project will significantly improve the understanding of the carbon cycle in 

 Cape Hatteras region by providing time series and high-resolution sections of the photosynthetic 

 parameters and primary production. In addition, laboratory experiments investigating the 

 relationship between fluorescence will lead to an improved understanding of the dynamics of 

 photosynthesis in marine phytoplankton. 



SPATIAL AND TEMPORAL SAMPLING SCALES 



OMP Moored Array: We propose to deploy five FRR fluorometers in the moored array to 

 measure photosynthesis. The separation between instruments will be 5-10 m in the vertical and 



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