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Od czasu odkrycia w latach 50. XX w. zjawiska ekspansji dna oceanicznego, czyli powstawania zupełnie nowej skorupy ziemskiej w strefach grzbietów śródoceanicznych, oraz w wyniku badań wieku osadów oceanicznych i samej skorupy, rozwinęło się kilka teorii geotektonicznych, spośród których powszechnie dziś akceptowana jest teoria tektoniki płyt. The motions of the ocean surface, known as undulations or waves, are the partial and alternate rising and falling of the ocean surface. The series of mechanical waves that propagate along the interface between water and air is called swell.[citation needed] Oregon’s year-round fishing spans the state from native redband trout in eastern deserts to rockfish and halibut in ocean waters – with lots of salmon, steelhead, trout and warmwater fishing in between. Whether your plans take you to a nearby neighborhood pond or to one of the state’s premiere fishing destinations, there will be a place for you to fish in Oregon every day of the year. email : The gas giants, Jupiter and Saturn, are thought to lack surfaces and instead have a stratum of liquid hydrogen, however their planetary geology is not well understood. The possibility of the ice giants Uranus and Neptune having hot, highly compressed, supercritical water under their thick atmospheres has been hypothesised. Although their composition is still not fully understood, a 2006 study by Wiktorowicz and Ingersall ruled out the possibility of such a water “ocean” existing on Neptune,[60] though some studies have suggested that exotic oceans of liquid diamond are possible.[61] Wiatry wiejące nad rozległymi obszarami wodnymi powodują powstawanie na powierzchni oceanu fal. Katastrofalne zjawiska, takie jak podwodne trzęsienia ziemi, wybuchy wulkanów czy rozległe osuwiska wywołują niszczące fale tsunami. Znacznie rzadziej tsunami może powstać na skutek upadku planetoidy, która trafi w powierzchnię oceanu. Extraterrestrial oceans may be composed of water or other elements and compounds. The only confirmed large stable bodies of extraterrestrial surface liquids are the lakes of Titan, although there is evidence for the existence of oceans elsewhere in the Solar System. Early in their geologic histories, Mars and Venus are theorized to have had large water oceans. The Mars ocean hypothesis suggests that nearly a third of the surface of Mars was once covered by water, and a runaway greenhouse effect may have boiled away the global ocean of Venus. Compounds such as salts and ammonia dissolved in water lower its freezing point so that water might exist in large quantities in extraterrestrial environments as brine or convecting ice. Unconfirmed oceans are speculated beneath the surface of many dwarf planets and natural satellites; notably, the ocean of Europa is estimated to have over twice the water volume of Earth. The Solar System’s giant planets are also thought to have liquid atmospheric layers of yet to be confirmed compositions. Oceans may also exist on exoplanets and exomoons, including surface oceans of liquid water within a circumstellar habitable zone. Ocean planets are a hypothetical type of planet with a surface completely covered with liquid.[11][12] The mission of OceanSITES is to collect, deliver and promote the use of high-quality data from long-term, high-frequency observations at fixed locations in the open ocean. OceanSITES typically aim to collect multidisciplinary data worldwide from the full-depth water column as well as the overlying atmosphere. Salmon spawn in cold and frozen oceans, and unlike the other 3 variants, can also spawn in rivers. The deep ocean houses an ecosystem that has learned to thrive without sunlight or warmth. Welcome to the abyss. Ocean scientists, resource managers, and conservationists need to understand negative impacts harming marine and coastal environments so they can better respond. With Esri, you can develop successful ocean policy and sustainable ocean practices. More than simple maps, Esri software helps you analyze data, conduct research, manage fisheries, facilitate planning processes, and more. A team at Massachusetts Institute of Technology has unveiled their own solution—an ultrasound-controlled, soft robotic fish. It’s not the only fish robot out there, but it could be the first that can swim in three dimensions, untethered, in the open ocean. Such a robot has the potential to transform the way biologists study the ocean. Cod spawn in normal, cold, and lukewarm oceans. For the time being, SoFi is remote-controlled. But the idea is that future versions would use machine vision to lock onto individual fish and follow them around, all without raising suspicion. That could help scientists study schooling dynamics, or monitor the health of fish populations in increasingly unhealthy oceans. “It could help us with the problems of fish avoidance and fish attraction that are associated with other forms of monitoring with robots and divers,” says Northeastern’s Hanumant Singh, who develops autonomous underwater vehicles but was not involved in the research. The total mass of the hydrosphere is about 1.4 quintillion metric tons (7018140000000000000♠1.4×1018 long tons or 7018150000000000000♠1.5×1018 short tons), which is about 0.023% of Earth’s total mass. Less than 3% is freshwater; the rest is saltwater, almost all of which is in the ocean. The area of the World Ocean is about 361.9 million square kilometers (139.7 million square miles),[9] which covers about 70.9% of Earth’s surface, and its volume is approximately 1.335 billion cubic kilometers (320.3 million cubic miles).[9] This can be thought of as a cube of water with an edge length of 1,101 kilometers (684 mi). Its average depth is about 3,688 meters (12,100 ft),[9] and its maximum depth is 10,994 meters (6.831 mi) at the Mariana Trench.[29] Nearly half of the world’s marine waters are over 3,000 meters (9,800 ft) deep.[16] The vast expanses of deep ocean (anything below 200 meters or 660 feet) cover about 66% of Earth’s surface.[30] This does not include seas not connected to the World Ocean, such as the Caspian Sea. Some delegations were already hostile, but Pardo was well prepared and passionate, even lyrical. The dark oceans, he said, “were the womb of life”. He then quoted John Mero’s research into the “astounding” contents of the billions of nodules lying untouched on the seabed – enough aluminium to last 20,000 years, zirconium for 100,000 years and cobalt for 200,000 years.  @oceanprime_cmr The ocean offers a range of dining options.  Terrestrial planets will acquire water during their accretion, some of which will be buried in the magma ocean but most of it will go into a steam atmosphere, and when the atmosphere cools it will collapse on to the surface forming an ocean. There will also be outgassing of water from the mantle as the magma solidifies—this will happen even for planets with a low percentage of their mass composed of water, so “super-Earth exoplanets may be expected to commonly produce water oceans within tens to hundreds of millions of years of their last major accretionary impact.”[73] The Nature Conservancy’s Rob Weary explains how the group brokered an innovative financing deal that could serve as a model for ocean protection in island developing nations.13 days ago On 1 November 1967, a UN committee was meeting in New York and the ambassador from the island nation of Malta was invited to speak. Dr Arvid Pardo faced an uphill struggle. He was suggesting that the deep oceans should be reserved for peaceful activities and that the mineral wealth should be shared by all of mankind. OMI serves to enrich and expand the public’s understanding of ocean science and conservation through the collaborative creation, exhibition, and open-distribution of innovative visual media as well as artistic approaches to ocean education. The deep ocean houses an ecosystem that has learned to thrive without sunlight or warmth. Welcome to the abyss. Researchers have found seven new animal species living along the Southwest Indian Ridge, 3,000 metres beneath the surface of the ocean, in an area targeted for deep-sea mining. Join Ocean Futures Society today–Be part of Jean-Michel’s team as we explore the world and address important issues. 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