All articles starting with O
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Occupy Wall Street
Occupy Wall Street (OWS) was a leaderless protest movement begun September 17, 2011 in Zuccotti Park, New York, called by Adbusters, protesting inequality as the 99 percent; it spread to hundreds of sites, shifted political discourse, and collapsed by 2012.
Occurrence and contamination sources of nitrosamines
Nitrosamines occur as trace contaminants wherever amines meet nitrosating agents such as nitrite, in cured meats, chlorinated drinking water, contaminated medicines, rubber, cosmetics, and wastewater, with endogenous body formation the largest source for most people.
Ocean
The ocean is the interconnected salt-water body covering about 70% of Earth's surface, holding 97% of its water, absorbing roughly 30% of CO2 emissions and 93% of excess heat, and governed largely under UNCLOS.
Ocean acidification
Ocean acidification is the ongoing decline in seawater pH caused by the ocean's absorption of human-made carbon dioxide, making the ocean about 30% more acidic since 1750.
Ocean acidification in the Arctic Ocean
Ocean acidification in the Arctic Ocean is the ongoing decrease in seawater pH and carbonate ions caused by carbon dioxide uptake, amplified by cold water, sea ice melt, and freshwater input.
Ocean alkalinity enhancement
Ocean alkalinity enhancement (OAE) is a proposed marine carbon dioxide removal approach that adds alkaline minerals or solutions to seawater, letting the ocean absorb more atmospheric CO2.
Ocean Beach, San Diego
Ocean Beach (OB) is a coastal San Diego neighborhood on Point Loma, known for its 1966 concrete pier, Dog Beach, Newport Avenue's independent shops, a 30-foot height limit, and a $170–190 million pier replacement project.
Ocean Beach, San Francisco
Ocean Beach is San Francisco's roughly five-mile Pacific shoreline south of the Cliff House, backed by the Great Highway and O'Shaughnessy seawall, an erosion hot spot studied by USGS, and fronted since 2025 by the car-free Sunset Dunes park.
Ocean bottom node (seismic)
An ocean bottom node is an autonomous seismic receiver placed on the seabed to record air-gun energy, offering wider azimuth and cleaner data than towed streamers.
Ocean carbon sink
The ocean carbon sink is the net removal of carbon dioxide from the atmosphere by the ocean, which absorbs 25 to 30 percent of human-made CO2 emissions.
Ocean circulation
Ocean circulation: the wind-driven surface and density-driven deep movement of seawater, including the AMOC, which transports heat, carbon, and nutrients globally and regulates climate; the ocean absorbs over a quarter of carbon emissions and about 93% of excess heat.
Ocean City, Maryland
Ocean City, Maryland is a barrier-island resort town in Worcester County, between the Atlantic and Sinepuxent Bay. Founded around the 1875 Atlantic Hotel, incorporated 1880, population 6,844 (2020), Maryland's primary seaside resort.
Ocean class
The Ocean class was a class of sixty British-design cargo ships built in the United States in 1941 and 1942, and the forerunner of the Liberty ship.
Ocean color
Ocean color is the spectral distribution of visible light leaving the sea surface, measured from satellites to track chlorophyll a, phytoplankton biomass, and the ocean's role in the carbon cycle.
Ocean Colour Scene
Ocean Colour Scene (OCS) are an English Britpop band formed in Moseley, Birmingham in 1989, known for Moseley Shoals (1996), The Riverboat Song, and Marchin' Already (1997), which topped the UK album chart.
Ocean County, New Jersey
Ocean County, New Jersey: county formed February 15, 1850 from Monmouth County lands south of the Manasquan River; county seat Toms River; 33 municipalities, 638 square miles, 45-mile Atlantic coast; population 637,229 (2020).
Ocean current
An ocean current, also called a sea or marine current, is a continuous stream of seawater driven by wind, density differences, and tides, carrying heat poleward and shaping climate.
Ocean data management and dissemination
Ocean data management and dissemination covers the practices, institutions, and standards for quality-controlling, archiving, and distributing oceanographic data, coordinated through the IODE program of UNESCO's Intergovernmental Oceanographic Commission.
Ocean deoxygenation
Ocean deoxygenation is the loss of dissolved oxygen from the world ocean, driven by warming, altered circulation, and coastal eutrophication; the open ocean has lost about 2% of its oxygen since the 1960s.
Ocean Drilling Program
The Ocean Drilling Program (ODP) was an international scientific partnership, run from 1985 to 2003 aboard the drillship JOIDES Resolution, that cored sediments and crust beneath the ocean basins.
Ocean Eyes (song)
"Ocean Eyes" is Billie Eilish's debut single, written and produced by her brother Finneas O'Connell for his band the Slightlys, uploaded to SoundCloud in November 2015 for her dance teacher, and released as a 2016 single on Darkroom/Interscope, later on Don't Smile at Me. Distinct from Owl City's 2009 album of the same name.
Ocean Fantasy Museum
Ocean Fantasy Museum (澄清湖海洋奇珍園) is a small aquarium in Niaosong District, Kaohsiung, Taiwan, inside a 1959 anti-nuclear underground command center at Chengcing Lake with a 200 m tunnel, 5,000 kg blast doors, eight exhibit areas, and a 13 m sperm whale skeleton; closed for renovation June 2026.
Ocean Farm 1
Ocean Farm 1 is the world's first offshore fish farm, a semi-submersible steel structure operated by Norwegian salmon farmer SalMar off Frøya in Trøndelag, Norway, since 2017.
Ocean fertilization
Ocean fertilization, also called Ocean Nourishment, is a proposed carbon dioxide removal technique that adds iron or other nutrients to the ocean to stimulate phytoplankton growth.
Ocean front
An ocean front is a narrow zone of sharp horizontal change in temperature, salinity, or density, separating two distinct water masses and concentrating pollutants and marine life.
Ocean general circulation model
An ocean general circulation model, also known as an ocean circulation model, is a numerical model that simulates ocean currents, temperature, salinity, and sea ice on a three-dimensional grid.
Ocean gyre
An ocean gyre, or oceanic gyre, is a large rotating system of surface ocean currents circling an ocean basin; five subtropical gyres occupy the major oceans.
Ocean heat content
Ocean heat content (OHC) is the total thermal energy stored in the ocean, which absorbs about 93 percent of the excess heat trapped by greenhouse gases.
Ocean Heaven (海洋天堂)
Ocean Heaven (海洋天堂, Haiyang Tiantang) is a 2010 Chinese drama, Xue Xiaolu's directorial debut, starring Jet Li as a terminally ill father teaching his autistic son to live alone; China's first autism-centered film.
Ocean liner
An ocean liner, also called a transatlantic liner, is a passenger ship built to carry people, mail, and cargo across oceans on fixed, published timetables, unlike cruise ships.