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Marine Pollution
Marine Pollution

... 1. Direct Discharge: From urban sewerage and industrial waste discharges, sometimes in the form of hazardous and toxic wastes. The wastes often contain toxic materials such as mercury, PCBs, PAHs and radioactive materials, which contaminate the water of ocean. 2. Mining of sand from the sea bed res ...
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Microplastics in the ocean

... at a regional or global scale. Microplastics are distributed throughout the ocean, occurring on shorelines, in surface waters and seabed sediments, from the Arctic to Antarctic. They may accumulate at remote locations such as mid-ocean gyres, as well as close to population centres, shipping routes a ...
Answers to STUDY BREAK Questions Essentials 5th Chapter 8
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... 20. Where are distinct water masses formed? The characteristics of each water mass are usually determined by the conditions of heating, cooling, evaporation, and dilution that occurred at the ocean surface when the mass was formed. 21. How does thermohaline circulation force the thermocline toward t ...
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Microplastics as contaminants in the marine

... activities account for an array of plastics being discarded along beaches and coastal resorts (Derraik, 2002), although it is worth noting that marine debris observed on beaches will also arise from beaching of materials carried on in-shore- and ocean currents (Thompson, 2006). Fishing gear is one o ...
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... 1. Weathering of rocks/minerals and salts introduced into streams that feed into the oceans. The total quantity of this is on the order of 2.5 billion tons annually. 2. Minerals and salts are also derived from volcanic eruptions, known as outgassing from Earth's interior. We know this is true becaus ...
Microplastic ingestion by scleractinian corals
Microplastic ingestion by scleractinian corals

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... westerly winds at mid latitudes, and stronger trade winds in the tropics, part of negative PDO and La Niña respectively. Reversals of these winds set up warm phases, associated with positive PDO and El Niño. These persistent anomalies in winds even alter sea levels across the Pacific, which is not t ...
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Eliminate the Patch: What the U.S. can do to solve the marine debris

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Ocean currents
Ocean currents

... 3. Continental Deflections work together to form a pattern of surface currents on Earth. Warm-water currents begin near the equator and carry warm water to other parts of the ocean. Cold-water currents begin closer to the poles and carry cool water to other parts of the ocean. While winds are respon ...
Ocean Currents
Ocean Currents

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Ocean Currents (10.3) PPT
Ocean Currents (10.3) PPT

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Physical Oceanography
Physical Oceanography

... The most abundant salt in seawater is ________, but there are many other salts present in the form of ions. The average salinity of seawater is _____ 35 ppt. Therefore, for every 1,000 ml water, there are ___ 35 grams of dissolved salts. Near the equator salinity is __________ lower than average due ...
Document
Document

... Where do warm surface currents begin? • They are created near the equator where there are very warm temperatures and a lot of direct sunlight. They then flow toward the polar regions. Most of them are on the eastern side of the continents. Where do cold surface currents begin? • They are created ne ...
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Great Pacific garbage patch



The Great Pacific garbage patch, also described as the Pacific trash vortex, is a gyre of marine debris particles in the central North Pacific Ocean located roughly between 135°W to 155°W and 35°N and 42°N. The patch extends over an indeterminate area, with estimates ranging very widely depending on the degree of plastic concentration used to define the affected area.The patch is characterized by exceptionally high relative concentrations of pelagic plastics, chemical sludge and other debris that have been trapped by the currents of the North Pacific Gyre. Despite its enormous size and density (4 particles per cubic meter), the patch is not visible from satellite photography, nor is it necessarily detectable to casual boaters or divers in the area, as it consists primarily of a small increase in suspended, often microscopic particles in the upper water column.
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