of the data sections . The smoothed power spectrum values for 

 two isotherms, one in the main thermocline and one below, for 

 each of the 27 data sections A through Z plus & were computed. 

 In this case (as in Cruise 4) no single frequency or frequency 

 bandwidth appeared to be dominant within the range of to 0. 35 

 cycle per minute in the individual spectra. 



Averaging the energy per bandwidth ( A/ = 0.025 cycle per 

 minute) for the 54 computed spectra of Cruise 8 in the same 

 manner as for Cruise 4 again revealed a peak in the emsemble 

 average (fig. 11) at 0. 15 cycle per minute ( A = 0.67 mile) . 



Reexamination of the spectra, individually, shows peaks at 

 many wavelengths but also shows a peak at A = 0.67 mile for 28 

 out of 32 cases and 48 out of 54 cases for Cruises 4 and 8, re- 

 spectively. Hence, 88 percent of the spectra thus far computed 

 show a peak at a wavelength of 0.67 mile. 



10,000 



0.05 



FREQUENCY, CYCLES PER MINUTE 

 0.10 0.15 0.2 0.25 



0.3 



0.35 



1,000 



100 



10 



























































































































































































































^- A 



= 0.67 Ml 



_E 





















































































^"■~»_ 































""""^ 































Figure 11. Ensemble average spectrum for NEL Thermistor Chain Cruise 8. 



26 



