DATA PRESENTATION 



Data Listing 



Tciiipcratuie, salinity, and doptii values at 

 standard levels of 0. 10. -20. 30. 40, .50, 75, 100. 

 loO, 200. -IM). ;500. 400. .-)00, 600. 700, 800, 900, 

 1000, 1100. 1-JOO, 1300. 1400 and 1500 metere. 

 alon<r with time, position, meteorolofrical. and 

 sea suxface data were suhniitted to tiie National 

 Oceanofrrapliic Data Center (XODC), which 

 later provided printed data listin<rs. In addi- 

 tion to the data submitted, the printed listinjrs 

 also contain values for sipina-t, specific volume 

 anomaly, dynamic lieijrht. and sound velocity 

 computed at NODC. The i)rinte(l data list in;: 

 for this cruise is contained in Appendix A. 



Surface Contours 



Surface values of temperature and salinity 

 were plotted aloii^' the cruise trade, and surface 

 contovirs were produced from these values (figs. 

 3 and 4). Tiie sea sui-face temperature contours 

 from tlic cruise may he compared to those col- 

 lected 19--21 August 1!I74 during a Coast Guard 

 Airborne Radiation Thermometer flight (fig.VS). 



Mean Vertically Averaged Sigma-t, o> 



,.--^-t on tiie 

 ^vere computed using thp^nite difference 

 relati 



n 

 1 



1 = 



T„Z„ 



where »„= ^-f aB)/&S^s the mean value of 

 sigma-t in. layer of thickrt*^ Z„, a, and ob are the 

 sigma-t values at the topNnid bottom of the 

 layep respectively, and I) tlie S^)th of the deep- 

 est ol)servati(m. not to exceed 2V0m. Contours 

 of mean veiticaliy averaged sigiSu-i (fig. fia) 



seem to be~TiTtk«tl^tothe_;ie 

 tion j[)titteHr-ivtiicnapX 

 -"TRumpus. l!»(iJ)). 



tl^snnimer circula- 

 tojmrallel the coast 



Dynamic Height Contours 



The geiieral siiiface circulation along the east- 

 ern continental slope can be inferred from dy- 

 namic height contours (fig. fib). Flow is parallel 

 to the isopleths with high values to the right 

 looking downstream. Tlie assumptions and 

 theory of inferring currents from dynamic 

 heiglits are discussed in Sverdrup et al. (1942. 

 pp. 451-457). Dynamic heiglits were referenced 

 to the 1000 decibar level. The reference level 

 was ciiosen using the method of Defant (1941). 

 Dynamic heights for stations where the water 

 depth was less than 1000 meters were calculated 

 in a manner similar to that described by Helland- 

 Hansen (1!>34). 



The general pattern shown by the dynamic 

 topography chart is a 10 to 30 cm s>- south- 

 westerly flow on the shelf and two anticyclonic 

 circulations in the slope water. The southerly 

 of the two circulations is obviously an eddy. 

 Infrared satellite imagery subseciuent to the 

 cruise leaves little doubt that the northerly 

 circulati(m is also an. eddy. 



Vertical Section Contours 



Vertical sections for temperature, salinity, and 

 sigma-t to a depth of 1000 meters were drawn 

 for Sections A-F which were approximately 

 noimal to the coastline (figs. 7-24). A more 

 meaningful presentation of vertical secticm con- 

 tours was produced by greatly exaggerating the 

 vertical distance scale in comparison to the hori- 

 zontal distance scale. 



