Figure 1

Map of the Weddell Sea area showing the locations where passive acoustic recordings were collected. Red-white dots represent the offshore mooring positions across the Weddell Sea from which one year (2013) of recordings was used. The yellow star represents the location of the PALAOA observatory on the edge of the Ekström ice-shelf from which three years (2015–2017) of consecutive recordings were used. Map was generated with M-MAP in MATLAB71.