Thermohaline Data and Océan Circulation on the Ross Sea Continental Shelf
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Fig. 4a. Salinity and potential température along the Ross Ice Shelf front and westward
across McMurdo Sound (right) from océan stations (numbers at top; locations as in Fig. 1)
in early February 1984. From continuous vertical measurements at each CTD station, projected onto 77.5°S, a 50-dbar by 1° longitude grid was derived and machine-contoured,
removing some of the spatial variability. Pressure (in decibars) is roughly equal to depth
in meters; potential température (°C) is within 0.03 of in-situ température at these depths;
salinity is in practical salinity units. The 27.8 isopycnal illustrâtes the similarity between
définition of density and salinity fields (see text for water mass abbreviations)
o
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(/) tn
0)
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East Longitude
Fig. 4b. East-west section as in Fig. 4a, but further north (Fig. 1) extending northwest at
the right end into Terra Nova Bay (74°50’S, 164°30’E)