G. Mattson 



David Starr ioTdan-Iowering electronic salinity- 

 temperature-depth probe with rosette of sampling 

 bottles. 



archive the edited magnetic tapes of data in the National 

 Oceanographic Data Center. We will produce as rapidly 

 as possible a comprehensive atlas of vertical sections and 

 horizontal plots of physical, chemical, and biological 

 properties. The scope of the expedition, the number of 

 observational lines, and the number of stations have 

 rendered it impractical to produce such an atlas within a 

 reasonable period by classical methods of cartography. 

 The data are all stored on magnetic tape, so computers 

 and electronic plotters can be used to generate mechan- 

 ically drawn plots and profiles. These plots, modified 

 where necessary by hand drafting, will form the basis of 

 tiie atlas. F. Miller, of lATTC, working with the BAS- 

 TROP AC project, has written a number of computer pro- 

 grams for the generation of the plots. The programs have 

 been remarkably successful, and we hope that, once the 

 problem of editing the original data logger tapes has been 

 completely solved, the production of an atlas will proceed 

 with very little delay; it will be produced in loose-leaf 

 form and batches of sheets will be issued as soon as they 

 become available, before the entire atlas is completed. 



The physical data are largely in the hands of SIO 

 scientists, who will be responsible for their analysis and 

 for subsequent studies on the results. W.H. Thomas, of 

 STOR, will be responsible for processing and analysis of 

 the data on dissolved nutrient salts. 



Many of the biological data, on the other hand, are 

 in the hands of BCF scientists in the Center. R.W. Owen, 

 assisted by B.F. Zeitzchel of STOR, is responsible for the 

 phytoplankton data-both primary productivity measure- 

 ments and chlorophyll determinations. The most im- 

 mediate product of this work will be distributions of 

 standing stocks and production rates over the EASTRO- 

 PAC year. The final product is to be a description of 

 seasonal changes, of the principal mechanisms that pro- 

 duce these changes, and of the relation between phyto- 

 plankton and other trophic levels in the region. 



G, Mattson 

 Resource sun'eys -skipjack tuna larvae from the 

 HASTROPA C expeditions. 



G, Mattson 



Resource sun'cys-yellowfin tuna larvae from a tropical 

 Pacific survey. 



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