Page 



CONCLUSIONS 77 



ACKNOWLEDGEMENT 77 



BIBLIOGRAPHY 79 



NOMENCLATURE 8l 



TABLES 



Table 1. Temperature Differences and Variations between 



Simultaneous Nansen and BT Casts k 



Table 2. k Values at Initial Stability 29 



Table 3« P Values for Various Stability Index Groups 30 



Table k. Correction of Stability Indexes for Salinity 



Difference in the Tnermocline 56 



Table 5. Wind and Sea Scale for Fully Developed Sea 60 



Table 6. Mean Monthly Temperature and At Values, Their 



Ranges and Standard Deviations at Three 



Ocean Weather Stations 65 



Table 7« Frequency of Prediction Errors of Tnermocline 



Depth 'jk 



Table 8. Mean Values of Prediction Errors ..... j6 



ILLUSTRATIONS 



Figure 1. Typical BT Traces 2 



Figure 2. Internal Waves at the Top and Bottom 



of the Tnermocline 6 



Figure 3« Amplitudes of Internal Waves: Frequency 



Distribution, Mean, and Standard Deviation. ... 7 



Figure h. Positions of Fronts With Respect to the 



Observation Point on 22 September 195^- 8 



Figure 5« Variation of Temperature Distribution Due to 



Internal Waves 9 



Figure 6. Simultaneous Short-Period Internal Waves at the 



Top and Bottom of the Tnermocline 11 



Figure 7« Instability Mixing Due to Advection 12 



Figure 8. Frequency Distribution of Thermocline Depths at 



Ocean Weather Station ECHO in September 1^ 



Figure 9. Frequency Distribution of Wind Force ax 



Ocean Weather Station ECHO 15 



Figure 10. Interaction of Orbital Motion in Surface and 



Internal Waves 17 



Figure 11. Homogeneous and Nonhomogeneous Systems ...... 20 



Figure 12. Deformation of the Mixed Layer by Induction of 



Velocity From Surrounding Nonhomogeneous Water. . 21 



Figure 13. Frequency Distributions, Means, and Standard 



Deviations of At, Temperature at 400 Feet, and 



Temperature Gradient (G^) Per Foot in the 



Thermocline 27 



