National Oceanographic Data CenterProvides worldwide oceanographic data that describe the ocean water column from seafloor to surface. The site offers online data on ocean currents, waves, salinity, temperature, oxygen, nutrients, chlorophyll, plankton, and biota. The World Ocean Atlas, Atlas of Surface Marine Data, History of the Arctic Exploration, Time Series Data for the White Sea, Hydrochemical Atlas of the Sea of Okhotsk, the Biological Atlas of the Arctic Seas 2000, Zooplankton of the Arctic Seas 2002, and Russian Marine Expeditionary Investigations of the World Ocean, and links to other ocean data resources on the web.