TITLE: The Palmer LTER: A Long-Term Ecological Research Program at Palmer Station, Antarctica AUTHORS: R.C.Smith, K.S.Baker, W.R.Fraser, E.E.Hofmann,D.M.Karl,J.M.Klinck, L.B.Quetin, B.B.Prezelin, R.M.Ross, W.Z.Trivelpiece, M.Vernet JOURNAL: Oceanography, pp.77-86 Palmer LTER Contribution No. 78 DATE: 1995 TEXT: The Antarctic marine ecosystem-the assemblage of plants, animals, ocean, sea ice, and island components south of the Antarctic Convergence-is among the largest readily defined ecosystems on Earth (36 x 10^6 km^2) (Hedgpeth, 1977; Petit et al., 1991). This ecosystem is composed of an interconnected system of functionally distinct hydrographic and biogeochemical subdivisions (Treguer and Jacques, 1992)and includes open ocean, frontal regions, shelf-slope waters, sea ice, and marginal ice zones. Oceanoic, atmospheric, and bio-geochemical processes within this system are thought to be globally significant, have been infrequently studied, and are poorly understood relative to more accessible marine ecolsystems (Harris and Stonehouse, 1991; Johannessen et al., 1994). The Palmer Long-Term Ecological Research (Palmer LTER) area west of the Antarctic Peninsula (Fig.1a) is a compley combination of a coaastal/continental shelf zone and a seasonal sea ice zone, because this area is swept by the yearly advance and retreat of sea ice. The Palmer LTER program is a multidisciplinary program established to study this polar marine ecosystem.