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Df lille, body of abstracl and indexing annotation must be entered when tht 



ORIGINATING ACTIVITY (Corporate author) 



Applications Research Division 

 Ocean Science Department 



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Numerical Methods of Predicting the Northern Edge 

 of the Gulf Stream 



DESCRIPTIVE NOTES (Type of report and inclusive dates) 



Technical Report 



AU THORISI (First I 



William H. Gemmill 



REPOR T D A TE 



April 1971 



ro T AL NO. O F 



14 



7b. NO. OF REFS 

 11 



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ORIGINATOR'S REPOR1 



TR-225 



3b. OTHER REPORT NO(S) (Any other numbers that may be assigned 

 this report) 



ASWEPS Report No. 18 



57^I.BUTIOtJ STATEMENT , 



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 requests through contract representatives to: Commander, Naval Oceanographic Office, Attn: Dissemination Center, 

 Washington, DC 20390. 



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U.S. Naval Oceanographic Office 

 Washington, D. C. 20390 



Four numerical simulation methods were examined in an effort to 

 predict the variation in position of the Gulf Stream's northern edge. 

 The first two methods, application of river meander theory to Gulf 

 Stream meanders and relating the Gulf Stream to paths of constant 

 potential vorticity in a barotropic flow, proved unsatisfactory for 

 Gulf Stream prediction. The second two methods, prediction by harmonic 

 analysis and a simple barotropic dynamic model, appear adequate for 

 short-term (less than 10 days) prediction. 



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