Figure 2
South-North plot of oxidation–reduction potential against water depth over Jøtul hydrothermal field. Data were recorded in mV (ORP sensor) along tow-yo CTD-15, which shows an example of the water column survey. The distribution of higher Eh values show how the hydrothermal plume water is rising upwards and drifting northwards from a black smoker at the seafloor. The drifting hydrothermal signal, documented by a clear weakening of ΔEh values in a northward direction, is consistent with ROV observations of a strong northward flow of bottom water17.
