Pacific Ocean Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south and is bounded by Asia and Australia in the west and the Americas in the east. At in area (as defined with an Antarctic southern border), this largest division of the World Ocean—and, in turn, the hydrosphere—covers about 46% of Earth's water surface and about one-third of its total surface area, making it larger than all of Earth's land area combined. The centers of
Lamont–Doherty Earth Observatory a collection of academic and research units within the university that together address complex environmental issues facing the planet and its inhabitants, with particular focus on advancing scientific research to support sustainable development and the needs of the world's poor. To support its research and the work of the broader scientific community, Lamont–Doherty operates the research vessel, the R/V "Marcus Langseth", which is equipped to undertake a wide range of geological, seismological, oceanographic and biological studies. Lamont–Doherty also houses the world's largest collection of deep-sea and ocean-sediment cores as well as many specialized research laboratories. The Lamont–Doherty Earth Observatory at