Methane at the NW of Weddell Sea, Antarctica

Figure 12

Random distribution of concentrations of CH₄ (ppm) versus water depth (m) at Weddell zone is shown (Figure 1). Sample 20 is not represented on this plot, since its maximum positive value of CH₄ (1,753 ppm) is out of scale. The average CH₄ concentration is 369.60 ppm at a depth of c. −350 m.