DATE 



NO OF HYDRO STATION 

 NO OF BT 

 GU TIME 



LATITUDE (NORTH) 

 LONGITUDE (WEST) 

 SURFACE SALINITY %. 

 SURFACE TEMPERATURE 



DISTANCE I NAUTICAL MILESl 4Q 



12 3 4 5 



LEGEND 



ISOTHERM 



v^ 





Figure 13. -Transect I-Section 10, May 25, 1963. Vertical temperature profile and thermograph record 

 of surface temperatures. Thermograph temperatures greater than 25° C. are read from the lower of 

 the two traces by adding 10° C. to the individual values. Bathythermogram numbers appear along the 

 surface temperature trace to show the times of the casts. Data on salinity, density, dissolved o.xygen 

 (ml. /I.), and inorganic phosphate (^j,g.-at./l.) are plotted on the vertical profile but not contoured. 



the left boundary of the Gulf Stream in each 

 transect is indicated in fig-ure 1 by unbroken 

 straight lines. The observed range of positions 

 of the boundary on transects I and II is indi- 

 cated by two parallel dashed lines. The mean 

 and range of the boundary positions along tran- 

 sect I are based on observations during 14 

 crossings between May 10 and June 6, 1963, 

 and along transect II on .5 consecutive crossings 

 between May 31 and June .5, 1963. The range 



is not given along transect III because only 

 three sections were made across the boundary 

 (in 2 consecutive days). 



Data are inadequate for the evaluation of 

 horizontal movement of the left boundary or of 

 the warm core between the transects. (Data 

 from the only run along the boundary from 

 transect II to transect I did not show signifi- 

 cant meandering.) It is reasonable, neverthe- 

 less, to make inferences from transect I data, 



GULF STREAM OFF CHESAPEAKE BAY 



399 



