Methane at the NW of Weddell Sea, Antarctica

Figure 6

Reflectors compatible with solid lenses (A) and discontinuous bands (B), recorded with sea-bottom portable profiler (EdgeTech Discover SB-3200-XS), in a sector of marine substrate up to 110 m below seabed (bsb), towards the NE of Bouchard zone (Figure 1). These reflectors may correspond to methane accumulations frozen in the marine substrate, surroundings of Seymour (Marambio) Island (Figure 1). (a) A survey sector of the marine substrate, 2 km long and 110 m depth. Latitude and longitude are specified at both the left and right corners of the profile. (b) Enlarged sector of the figure (a).