To coordinate the flight track with the record position, numbers are dialed by the 

 navigator onto the record. 



The equipment has been built by the Pacific Oceanographic Group with some finan- 

 cial aid from the Royal Canadian Air Force and advice and assistance from Canadian Avia 

 tion Electric and Barnes Engineering. It is being flown by the RCAF, The records are 

 interpreted by the Canadian Meteorological Service on the basis of know-how provided by 

 the Pacific Oceanographic Group. The whole project is coordinated by the Oceanographic 

 Services for Defence who provide oceanographic information for military and civil purposes. 



i 



Five units have been built. Two are for service use on the Atlantic coast, two on the 

 Pacific coast and one for research assessment. 



There are two phases of research assessment, the effect of the atmosphere on the 

 radiation and the interpretation of apparent sea surface temperature into seawater structure. 

 Neither research could be undertaken until quality equipment was available. Both re- 

 searches are to be initiated this year. 



Recently Mr. W. Bell of P.O.G. reviewed the available literature on atmospheric 

 effects on infrared transmission through the atmosphere. He concluded that much of it is 

 contradictory and no quantitative conclusions could be drawn to provide practical means of 

 correcting ART records for height, pressure, moisture or haze. This research has been 

 taken up by Dr. W. L. Godson of the Research Division of the Canadian Meteorological 

 Service, who has considerable research background in this area. He proposes to review the 

 literature again, discarding the doubtful and contradictory work. Then he proposes to con- 

 duct the necessary fundamental research to provide practical means of correcting the 

 records to reveal the true temperature within limits of about 0.1C°. This is a meteorologi- 

 cal problem and will be studied at Toronto. 



To evaluate the relation of the sea surface temperature record to subsurface temper- 

 ature and structure Dr. L. F. Giovando of the Pacific Oceanographic Group has designed 

 a series of experiments. 



He will mount the ART about 10 to 15 feet above the sea on a tower. He will place 

 thermistor arrays in the water to observe the temperature, the structure and behaviour 

 during heating and cooling periods. If the theory is correct, there should be a recognizable 

 correlation. 



During a cooling period or when there is convection the radiation temperature should 

 agree well with the temperature in the mixed layer. 



During a heating situation there should be a mixed layer due to wind or to surface 

 evaporation. In either case the radiation temperature should represent the real sea surface 

 temperature to the depth of the first transient thermocline. Such transients can only occur 

 in a heating situation and because of the gust nature of the wind they must be local and ir- 

 regular. Hence an irregular record betrays transients. 



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