1.0 



0.9 

 0.8 

 0.7 

 0.6 

 R\ 0.5 

 0.4 

 0.3 

 0.2 

 0.1 

 



1 



1 1 1 



1 1 1 









60 LAGS 









(30MIN) 







- 



•■-.. R A =0.66 





- 



- 



1 ■'--.. 

 1 





- 



— 



1 --... 

 1 



120 LAGS 



- 





1 

 1 



'•■•-.. (60 MIN) 









'--.... R x = 0.33 





- 







— 



- 







- 



1 



1 



1 



1 1 1 



1 1 1 



— 



10 



20 



30 



40 

 MINUTES 



50 



60 



70 



80 



Figure 24. Autocorrelation of successive half-minute readings of the depth of the 19 C 

 isotherm (Section Q). The 60-lag (30-minute) and UO-lag (60-minute) values are 

 indicated ( A = 60 and 120, respectively). 



values are negative. In the example, the value of R x after 60 lags 

 is reduced to 0.66; after 120 lagsi? A , 0.33; and after 144 lags 

 R x , 0.22. There are no dominant peaks in the curve. 



To summarize the autocorrelation of successive depth 

 changes with time and distance, two points were scaled off the 

 individual plots of autocorrelation, one at 60 lags (30 minutes) 

 and another at 120 lags (60 minutes) (table 4). 



TABLE 4. AUTOCORRELATION R x OF SUCCESSIVE HALF- 

 MINUTE READINGS OF ISOTHERM DEPTH IN 

 MAIN THERMOCLINE (SHALLOW) AND ISOTHERM 

 BELOW MAIN THERMOCLINE (DEEP) (Continued 

 on page 50) 



Section 



X = 60 Lags 

 (30 minutes) 



A = 120 Lags 

 (60 minutes) 





Shallow 



Deep 



Shallow 



Deep 



A 



0.59 



-0.02 



0.31 



-0.12 



B 



0.70 



0.45 



0.43 



0.30 



49 



