intensity in space and time spanning the Lake and basin, the' 

 numbers and types of data acquisition systems, and the use of 

 advanced data acquisition systems. Figure 2 shows some of the 

 major U.S, IFYGL data collection systems and the data flow. The 

 U.S. Field Headquarters, located in Rochester, New York, was 

 responsible for the deployment, operations, maintenance, and 

 logistic support for the major U.S. data acquisition systems and for 

 field data management activities. The Canada Centre for Inland 

 Waters (CCIW) was the focal point for Canadian field operations. 

 From some of the five acquisition systems identified in Figure 2, data 

 were communicated automatically, while from others data were 

 retrieved manually by courier. 



station 



/ Water Analysis Labs 

 / 





\J 



Fig. 2 IFYGL data collection systems and data flow. 



The ship systems measured the physical, chemical, biological, and 

 meteorological properties of the Lake and atmosphere at 

 predetermined stations and along tracks using various measurement 

 devices, such as electronic bathythermographs. Water samples were 

 obtained and processed at water analysis laboratories on board the 

 vessels and also at shore facilities. Canada had three major research 

 vessels participating in data collection, the Martin Karlsen, the 

 Limnos, the Port Dauphines as well as smaller vessels. The United 



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