Wilker son 



slope of the phase progression line connecting meanders (dashed lines) 

 corresponds to a phase speed of 6 n.m. per day or 13 cm/sec. The 

 eastward translation of the meanders is neither uniform nor constant 

 during this five month period. From September through November the 

 smaller of the two meanders moved eastward at a speed of about 2 to 

 3 n.m. per day or about 5 to 9 cm/sec, while the larger meander 

 moved somewhat slower toward the east at about 1 to 1.5 n.m. per day 

 or about 2.5 cm/sec. 



From November to January, the translational speed increases for 

 the larger meander to about 4 n.m. per day or about 10 cm/sec. The 

 speed of the smaller meander decreased to about 1 n.m. per day and 

 appears to have regressed slightly westward. 



In summary the shape of the northern boundary of the Gulf Stream 

 between 30 September 1966 and 13 January 1967 is described by two 

 meanders which moved eastward at speeds of 1 to 4 n.m. per day (2.5 

 to 10 cm/sec) with a wavelength of 300 to 500 km. The height of the 

 meanders generally increased with distance from Cape Hatteras and 

 ranged from 35 to 100 km between Cape Hatteras and TCW, and from 

 about 200 to 300 km between 60°^? and 70°W. 



REFERENCES 



FUGLISTER, F.C. and VOORHIS, A.D. (1965), A New Method of Tracking 

 the Gulf Stream. Limnology and Oceanography, 10 (Supplement: 

 Readf ield Anniversary Volume) . 



HANSEN, D.V. (1966), Personal Communication. Environmental Science 

 Services Administration (ESSA) . 



PICKETT, R.L. and WILKERSON, J.C. (1966), Airborne IR tracking of 

 Gulf Stream. Geo-Marine Technology 2(5): 8-11. 



STOMMEL, HENRY, von ARX, W.S,, PARSON, D. and RICHARDSON, W.S. (1953), 

 Rapid aerial survey of Gulf Stream with camera and radiation 

 thermometer. Science, 117 (3049): 639-640. 



STRACK, S.L. (1953), Surface temperature gradients as indicators of 

 the position of the Gulf Stream. Woods Hole Oceanogr. Inst. 

 Tech. Rept., Ref. 53-53 (unpublished manuscript). 



von ARX, W.S. and RICHARDSON, W.S. (1953), Aerial reconnaissance of 

 the surface outcrop of the Gulf Stream front. Woods Hole 

 Oceanogr. Inst. Tech. Rept., Ref. 53-24 (unpublished manuscript). 



418 



