Table U. — Estimated range and average current velocity for September- 

 December 1962-63 in the northvestern Gulf of Mexico. 



1963 



Range 



Average Range 



Average 



September 

 October 

 November 

 December 



1-10 



2-4 



2-12 



2-5 



8-9 9 



no data 

 no data 

 no data 



Information on current velocities was generally 

 restricted to the 1962 data, but no distinct trend was 

 readily apparent. Ranges and averages for each month 

 are shown in Table 4. 



The seasonal shift in wind circulation over the study 

 area during this period agreed generally with the direc- 

 tion of surface water movement. With few exceptions, 

 east to southeast winds became more northerly until in 

 November 1963 and December 1962 north winds 

 dominated over the entire study area. The lack of drift 

 bottle recoveries during this period supports the implied 

 offshore southerly flow of surface waters. 



LITERATURE CITED 



ARMSTRONG, R. S., J. R. GRADY, and R. E. STEVENSON. 



1967. Cruise "Delta I" of the "Geronimo". Commer. Fish. Rev. 

 29(2):15-18. 

 CHEW, F., K. L. DRENNAN, and W. J. DEMORAN. 



1962. Some results of drift bottle studies off the Mississippi Delta. 

 Limnol. Oceanogr. 7:252-257. 



CURRAY, J. R. 



1960. Sediments and history of Holocene transgression, continen- 

 tal shelf, northwest Gulf of Mexico. In Shepard, F. P., F. B. 

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 DAY, C. G. 



1958. Surface circulation in the Gulf of Maine as deduced from 

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1963. Surface circulation in the northeastern Gulf of Mexico. Gulf 

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1963. Some results of recent circulation studies east of the Missis- 

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 ICHTYE, T. 



1962. Circulation and water mass distribution in the Gulf of Mex- 

 ico. Geofis. Int. (Mexico City) 2(3):46-76. 



KUTKUHN, J. H. 



1963. Expanded research on Gulf of Mexico shrimp resources. Proc. 

 Gulf Caribb. Fish. Inst., 15th Ann. Sess., 1962:65-78. 



LEIPPER, D. F. 



1954. Physical Oceanography of the Gulf of Mexico. In P. A. Galt- 

 soff (coordinator), Gulf of Mexico, its origin, waters, and marine 

 life, p. 119-137. U.S. Fish Wildl. Serv., Fish. Bull. 55. 

 MOORE, G. T. 



1973. Submarine current measurements — northwest Gulf of Mex- 

 ico. Trans. Gulf Coast Assoc. Geol. Soc. 23:245-255. 

 SMITH, F. G. W., A. F. MEDINA, and A. F. B. ABELLA. 



1951. Distribution of vertical water movement calculated from sur- 

 face drift vectors. Bull. Mar. Sci. Gulf Caribb. 1:187-195. 

 U.S. DEPARTMENT OF COMMERCE. 



1962-1963a. Local climatological data, Brownsville, Texas. 



Weather Bureau. 

 1962-1963b. Local climatological data, Galveston, Texas. Weather 



Bureau. 

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 Weather Bureau. 

 WATSON, R. L„ and E. W. BEHRENS. 



1970. Nearshore surface currents, southeastern Texas Gulf Coast. 

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13 



6 U.S Government Printing Office: 1979— 698-045'1 18 



