SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered; 



REPORT DOCUMENTATION PAGE 



1. REPORT NUMBER 



TR-258 



2. GOVT ACCESSION NO 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



3. RECIPIENT'S CATALOG NUMBER 



A. T\TLE (and Subtitle) , • r, j. ■ • iU 



Circulation and Oceanographic Properties in the 

 Somali Basin as Observed During the 1979 

 Southwest Monsoon 



S. TYPE OF REPORT & PERIOD COVERED 



Technical Report 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs; 



Beatty, William H. Ill; Bruce, John G. ; 

 Guthrie, Robert C. 



8. CONTRACT OR OR AN>TiUMBERr«; 



WHO 



DOCilMFN 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Naval Oceanographic Office 



NSTL Station 



Bay St. Louis, Mississippi 39522 



PROGRAM ELEMENT, PROJECT, TASK 



AREA a WORK uiJir •{0^^fsCQlr|Q[\^ 



II. CONTROLLING OFFICE NAME AND ADDRESS 



12. REPORT DATE 



June 1981 



13. NUMBER OF PAGES 



U. MONITORING AGENCY NAME 4 ADDRESSf// di//oren( from Controlling OHIce) 



IS. SECURITY CLASS, (ol thla report) 



Unclassified 



15a. DECLASSIFI CATION/ DOWN GRADING 

 SCHEDULE 



16. DISTRIBUTION STATEMENT (of this Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (of the abatreet entered In Block 20, If different from Report) 



18. SUPPLEMENTARY NOTES 



John G. Bruce is currently affiliated with Woods Hole Oceanographic 

 Institution 



I -0 

 i CD 



= o 



9. KEY WORDS (Continue on reverse elde If necetaiy and Identify by block number) , . r- j. r- j. n jr ■ 



Indian Ocean, Southwest Monsoon, Somali Current, Somali Front, East African 

 Current, Fronts, Eddies, Currents, Physical Oceanography, Indian Ocean Surveys 

 Oceanographic Stations, XBTs. 



0. ABSTRACT (Continue on reverme elde If neceaeary and Identify by block number) 



Shipboard expendable bathythermograph (XBT), salinity- temperature-depth (STD), 

 and sea surface temperature and salinity observations were taken from USNS 

 WILKES (T-AGS 33) from 16 August until 5 September 1979 in the area of the 

 Somali Current off the coast of Northeast Africa. Analysis of the data 

 indicated the presence of two large anti -cyclonic gyres. The larger of the 

 two gyres, called the Great Whirl or Prime Eddy, was centered at about 7°N 

 and 55°E with a diameter of approximately 350 nautical miles. The smaller 



DD 



EDITION OF 1 NOV 66 IS OBSOLETE 



S/N 0102-014- 6601 | 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



