conclus ions . 



The alternative to anchor station type of data would be 

 a series of observations taken simultaneously by several ships 

 each at a different location. This type of synoptic data would 

 be very useful if one wished to consider the effects of hori- 

 zontal advection on the thermal structure, since it would give 

 an estimation of horizontal gradients. Actually the optimum 

 would be a combination of the two types of data. Except for 

 the possibility of expanding the weather ship program, however, 

 the cost of any such network as a regular procedure would be 

 prohibitive . 



This then was the type of data that was desired. Searches 

 were made in all possible sources in order to obtain the data 

 which best fit the requirements, but with very little success. 

 By far, the bulk of the time-series data available consists of 

 BT data taken from weather ships. In addition the only repeated 

 anchor stations that could be found v;ere the set of observations 

 used in the example in the text. The deficiencies of both these 

 types of data have been discussed above in connection with the 

 discussion of the use to which the data vias put. 



Although the data acquired in time to be of use in this 

 report were far from adequate, much progress has been made both 

 in arranging for complete collections of suitable data and in 

 the development of new observational techniques aimed at increas- 

 ing the value of the data. Much of this work' has been carried 

 on in the Ilydrographic Office itself. Arrangements have been 

 made for future cruises of the Hydrographic Office survey ships 



70 



