Oceanography, also known as oceanology, sea science and ocean science, is the scientific study of the oceans. It is an Earth science, which covers a wide range of topics, including ecosystem dynamics; ocean currents, waves, and geophysical fluid dynamics; plate tectonics and seabed geology; and fluxes of various chemical substances and physical properties within the ocean and across its boundaries. These diverse topics reflect multiple disciplines that oceanographers utilize to glean further knowledge of the world ocean, including astronomy, biology, chemistry, climatology, geography, geology, hydrology, meteorology and physics. Paleoceanography studies the history of the oceans in the geologic past. An oceanographer is a person who studies many matters concerned with oceans, including marine geology, physics, chemistry, and biology.
Necho II of Egypt was a king of the 26th Dynasty, which ruled from Sais. Necho undertook a number of construction projects across his kingdom. In his reign, according to the Greek historian Herodotus, Necho II sent out an expedition of Phoenicians, which in three years sailed from the Red Sea around Africa to the Strait of Gibraltar and back to Egypt. His son, Psammetichus II, upon succession may have removed Necho's name from monuments.
The Challenger expedition of 1872–1876 was a scientific programme that made many discoveries to lay the foundation of oceanography. The expedition was named after the naval vessel that undertook the trip, HMS Challenger.
Alvin (DSV-2) is a crewed deep-ocean research submersible owned by the United States Navy and operated by the Woods Hole Oceanographic Institution (WHOI) in Woods Hole, Massachusetts. The vehicle was built by General Mills' Electronics Group in Minneapolis, Minnesota. Named to honor the prime mover and creative inspiration for the vehicle, Allyn Vine, Alvin was commissioned on June 5, 1964. The submersible is launched from the deep submergence support vessel RV Atlantis (AGOR-25), which is also owned by the U.S. Navy and operated by WHOI. The submersible has made more than 5,000 dives, carrying two scientists and a pilot, to observe the lifeforms that must cope with super-pressures and move about in total darkness, as well as exploring the wreck of Titanic. Research conducted by Alvin has been featured in nearly 2,000 scientific papers.
Geographical exploration, sometimes considered the default meaning for the more general term exploration, refers to the practice of discovering remote lands and regions of the planet Earth. It is studied by geographers and historians.
Scylax of Caryanda was a Greek explorer and writer of the late 6th and early 5th centuries BCE. His own writings are lost, though occasionally cited or quoted by later Greek and Roman authors. The periplus sometimes called the Periplus of Scylax is not, in fact, by him; that so-called Periplus of Pseudo-Scylax was written in about the early 330s BCE by an unknown author working in the ambit of the post-Platonic Academy and/or the Aristotelian Peripatos (Lyceum) at Athens.
Argo is an international programme for researching the ocean. It uses profiling floats to observe temperature, salinity and currents. Recently it has observed bio-optical properties in the Earth's oceans. It has been operating since the early 2000s. The real-time data it provides support climate and oceanographic research. A special research interest is to quantify the ocean heat content (OHC). The Argo fleet consists of almost 4000 drifting "Argo floats" deployed worldwide. Each float weighs 20–30 kg. In most cases probes drift at a depth of 1000 metres. Experts call this the parking depth. Every 10 days, by changing their buoyancy, they dive to a depth of 2000 metres and then move to the sea-surface. As they move they measure conductivity and temperature profiles as well as pressure. Scientists calculate salinity and density from these measurements. Seawater density is important in determining large-scale motions in the ocean.
The geography of North Africa has been reasonably well known among Europeans since classical antiquity in Greco-Roman geography. Northwest Africa was known as either Libya or Africa, while Egypt was considered part of Asia.
The Maritime history of Europe represents the era of recorded human interaction with the sea in the northwestern region of Eurasia in areas that include shipping and shipbuilding, shipwrecks, naval battles, and military installations and lighthouses constructed to protect or aid navigation and the development of Europe. Europe is situated between several navigable seas and intersected by navigable rivers running into them in a way which greatly facilitated the influence of maritime traffic and commerce. Great battles have been fought in the seas off of Europe that changed the course of history forever, including the Battle of Salamis in the Mediterranean, the Battle of Gravelines at the eastern end of the English Channel in the summer of 1588, in which the “Invincible” Spanish Armada was defeated, the Battle of Jutland in World War I, and World War II’s U-boat war.
Jason is a two-body remotely operated vehicle (ROV) designed, built, and operated by the National Deep Submergence Laboratory of the Woods Hole Oceanographic Institution (WHOI). Construction of Jason began in 1982 and was first launched in 1988, redesigned in 2002 as the second iteration of the ROV. The ROV allows scientists and explorers to have access to the seafloor without leaving the deck of a ship.
The Eratosthenes Seamount or Eratosthenes Tablemount is a seamount in the Eastern Mediterranean, in the Levantine basin about 100 kilometres (60 mi) south of western Cyprus. Unlike most seamounts, it is a carbonate platform not a volcano. It is a large, submerged massif, about 120 by 80 kilometres. Its peak lies at the depth of 690 metres (2,300 ft) and it rises 2,000 metres (6,600 ft) above the surrounding seafloor, which is located at the depth of up to 2,700 metres (8,900 ft) and is a part of the Herodotus Abyssal Plain. It is one of the largest features on the Eastern Mediterranean seafloor.
The history of navigation, or the history of seafaring, is the art of directing vessels upon the open sea through the establishment of its position and course by means of traditional practice, geometry, astronomy, or special instruments. Many peoples have excelled as seafarers, prominent among them the Austronesians, the Harappans, the Phoenicians, the Iranians, the ancient Greeks, the Romans, the Arabs, the ancient Indians, the Norse, the Chinese, the Venetians, the Genoese, the Hanseatic Germans, the Portuguese, the Spanish, the English, the French, the Dutch, and the Danes.
Deep-sea exploration is the investigation of physical, chemical, and biological conditions on the ocean waters and sea bed beyond the continental shelf, for scientific or commercial purposes. Deep-sea exploration is an aspect of underwater exploration and is considered a relatively recent human activity compared to the other areas of geophysical research, as the deeper depths of the sea have been investigated only during comparatively recent years. The ocean depths still remain a largely unexplored part of the Earth, and form a relatively undiscovered domain.
Marine navigation is the art and science of steering a ship from a starting point (sailing) to a destination, efficiently and responsibly. It is an art because of the skill that the navigator must have to avoid the dangers of navigation, and it is a science because it is based on physical, mathematical, oceanographic, cartographic, astronomical, and other knowledge.
Maritime history dates back thousands of years. In ancient maritime history, evidence of maritime trade between civilizations dates back at least two millennia. The first prehistoric boats are presumed to have been dugout canoes which were developed independently by various Stone Age populations. In ancient history, various vessels were used for coastal fishing and travel. A mesolithic boatyard has been found from the Isle of Wight in Britain
NOAAS Okeanos Explorer is a converted United States Navy ship, now an exploratory vessel for the National Oceanic and Atmospheric Administration (NOAA), officially launched in 2010. Starting in 2010, NOAA entered into a five-year partnership with the San Francisco Exploratorium. The focus is on gathering scientific information about oceans for the public as well as for scientific uses. As much as 95% of the ocean remains unexplored, NOAA officials said. The ship is equipped with cameras and will provide real-time viewing of the ocean floor for scientists and for the public.
The Blake Plateau lies in the western Atlantic Ocean off the coasts of North Carolina, South Carolina, Georgia, and Florida in the southeastern United States. The Blake Plateau lies between the North American continental shelf and the deep ocean basin extending about 145 kilometers east and west by 170 kilometers north and south, with a depth of about 500 meters inshore sloping to about 1,000 meters about 375 kilometers off shore, where the Blake Escarpment drops steeply to the deep basin. The Blake Plateau and the associated Blake Ridge and Blake Basin are named for the United States Coast and Geodetic Survey steamer USC&GS George S. Blake, in service from 1874 to 1905, which was the first ship to use steel cable for oceanographic operations and pioneered deep ocean and Gulf Stream exploration. George S. Blake′s hydrographic survey lines first defined the plateau that now bears the ship's name.
Marine biology is a hybrid subject that combines aspects of organismal function, ecological interaction and the study of marine biodiversity. The earliest studies of marine biology trace back to the Phoenicians and the Greeks who are known as the initial explorers of the oceans and their composition. The first recorded observations on the distribution and habits of marine life were made by Aristotle.
This expedition was the final of three expeditions on the NOAAS Okeanos Explorer intended to increase the understanding of the deep-sea environment in the Gulf of Mexico. Gulf of Mexico 2018 was a 23-day telepresence-enabled expedition to collect critical information and acquire data on priority exploration areas identified by the ocean management and scientific communities. The goal of the expedition was to use remotely operated vehicle (ROV) dives in combination with seafloor mapping operations to increase the understanding of deep-sea ecosystems and collect scientific information to support future management decisions. The expedition lasted from 11 April 2018 to 3 May 2018.
Underwater exploration is the exploration of any underwater environment, either by direct observation by the explorer, or by remote observation and measurement under the direction of the investigators. Systematic, targeted exploration is the most effective method to increase understanding of the ocean and other underwater regions, so they can be effectively managed, conserved, regulated, and their resources discovered, accessed, and used. Less than 10% of the ocean has been mapped in any detail, less has been visually observed, and the total diversity of life and distribution of populations is similarly obscure.
