Fig. 4: Temperature–salinity relation for the conductivity, temperature, and depth (CTD) stations and current velocity from ADCP profile.
From: Ryder Glacier in northwest Greenland is shielded from warm Atlantic water by a bathymetric sill
a CTD-profiles from landward of the inner sill (#16, 17, black) and directly north of it (#12, red) in Sherard Osborn Fjord. b CTD-profiles from inside (#37,45, black) and outside (#1, red) of the sill in Petermann Fjord (see Fig. 1 for locations of stations). The small insets in a and b show the full salinity and temperature ranges to provide overviews. The dashed blue line shows the temperature–salinity relation resulting when ocean water melts ice35 and the dashed magenta line shows the relation resulting from mixing between ocean water and freshwater injected by subglacial discharge36. Note that the waters in Sherard Osborn Fjord landward of the inner sill (Inner Basin) are colder and fresher than the waters in the outer fjord (Outer Basin) from the top of the inner sill at about 200 m all the way to the bottom, indicating an influence on the physical oceanography of Ryder Glacier on the inner fjord basin. c Current velocity from ADCP data and density profile at station #19 located in the relatively narrow channel forming the deepest passage across the inner sill in Sherard Osborn Fjord. The u and v component show the east and north velocities, respectively, capturing a situation with a near bottom inflow towards the southeast in the channel.
