Maps show the Amundsen Sea Polynya and locations of major ASPIRE hydrological stations and moored sediment traps. Yellow and red triangles indicate the ASPIRE and Korean trap locations, respectively. A Moderate Resolution Imaging Spectroradiometer (MODIS) Terra satellite image from 02 January 2011 shows the open water (polynya) area (A); regional bathymetry is shown in (B).