B. SCIENTIFIC PROGRAM 



The observational and sampling programs common to each 

 vessel participating included serial casts to an assured depth 

 of 2000 meters. Bottom casts were made every 120 miles from 

 vessels with the capability. Measurements of temperature, salinity , 

 oxygen and inorganic nhosphate were made at each depth sampled. 

 Bathythermograph lowerings were made every 30 miles. Daily 

 measurements were made of primary productivity using the C-l4 

 technique. Also measured daily was the microbiomass at the surface 

 and at depths of 50,20, and 10 meters and of that depth receiving 

 one percent of incident radiation. A zooplankton tow was made 

 once each night, oblique to the top of the thermocline. Routine 

 meterological observations were made at the time of each BT and 

 at 0000, 0600, 1200 and 1800 hours daily. Plans for various 

 special types of observations aboard one or more of the participating 

 vessels included upper air meterological data by U.W. Weather 

 Bureau Observers. The Weather Bureau's Weather Satellite Center 

 made sea surface ratiation measurements, special cloud observations 

 and photographs. Direct current measurements were made by means 

 of instrumented buoy arrangs anchored from CHAIN (WH0I) and from 

 the Soviet vessel LOMONOSOV^ and with drogues operated from the ' 

 U.S. Coast and Geodetic Survey ship EXPLORER. 



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