Figure F30. Locations of Sites 1233–1235 on subsurface oxygen. Circles mark the current site locations relative to the oxygen-poor Gunther Undercurrent (GU) and the relatively oxygen-rich Antarctic Intermediate Water (AAIW). Vertical bars on the sites indicate the likely effect of last glacial maximum sea level fall of ~130 m on the position of the sites relative to the sea surface. PCW = Pacific Central Water.