Clark and Yarnall 



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u. 

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oc 



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50 







n 



1 



TOTAL = 411 SIGNATURES 



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- 1 T — ? — T 



< 150 1 

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§^100 



iiji 

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LU 



I- 

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50- 







10 15 20 



PERIOD (MINUTES) 



25 



Tip, o o o 



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 ro CD 



Fig. 18 - Distributions of internal wave signatures 



356 



