For the reconstruction of paleoenvironment and retreat of grounding line and calving line, 14C ages, X-radiograph, magnetic susceptibility, granulometry, biogenic opal, total organic carbon, d13C, total nitrogen, total organic carbon-total nitrogen ratio, CaCO3, clay mineral composition, diatom assemblage were analyzed. During the DG12 Expedition in 2012 using Korean I/B ARAON, gravity cores (DG12-GC01, GC02, GC04, and GC05) were obtained on the northern Drygalski Basin in the Ross Sea since Last Glacial Maximum.