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MODE • i FIELD EXPERIMENT 



AIRCRAH: MASS TRANSPORT MEASURING 

 FLOATS, XBT TEMPERATURE PROFILES 



SURFACE BUOYS 

 EULERIAN ARRAYS 



SHIPS: CTB & XBT 

 PROFILES. DATA 

 RADIOED TO ( 

 FROM SHORE 



U6RANGIAN 

 SUBSURFACE 

 FLOATS TRACKED 

 BY SOFAR 



SOFAR ARRAY. DATA 

 TO SHORE 



ELECTRODES MEASURING 

 GEOMAGNETIC ELECTROKINETIC 

 POTENTIAL. MONITOR VARIATIONS 

 OF MEAN FLOW 



RECOVERABLE LAUNCHERS TRACK 

 EXPENDABLE UPWARD PROFILING FLOATS 



Figure 9 



(6) extended pattern recognition at 3000 m 

 depth. 



Benthic Array and Floats — Superimposed on 

 this fixed array of current meters was a sec- 

 ond fixed array of benthic instruments for 

 pressure and electric field measurements. Also 

 included in the experiment were free-floating 

 and profiling instruments including 20 large, 

 neutrally buoyant floats situated near 1500 m 

 depth in a sound channel. Moreover, deter- 

 minations of transport over different depth 

 ranges were made over the entire MODE 

 region utilizing instruments dropped from 

 aircraft. 



Mini-Mode — The Mini-MODE experiment 

 was situated in a small portion of the MODE-1 

 current meter, benthic, and float arrays. Five 

 additional moorings were deployed with cut- 

 rent meters at 500, 1500, 3000 and 4000 m in 

 an area 100 km square and to the east of the 

 central array. Within this region a total of 



36 floats were launched to drift at depths, 

 variously, of 500, 1500 and 3000 m. Mini- 

 MODE was designed and executed largely by 

 British oceanographers to examine features 

 with spatial scales smaller than those which 

 could be detected by the main arrays. 



The Theoretical Program 



Close scientific cooperation between theo- 

 reticians and experimentalists is essential to 

 a successful investigation of medium-scale 

 motions and to progress towards an under- 

 standing of their dynamic interrelationships. 

 The development and application of numerical 

 models is of great importance in several re- 

 spects: the detailed design of field experi- 

 ments; the development of synoptic mapping 

 techniques; and the investigation of dynamical 

 hypotheses. Numerical modeling is an essen- 

 tial tool in MODE in that it provides the link 



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