Upwelling occurs in the northerngyreand downwelling in the southerngyre.
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Subtropical gyres occupy a large fraction of the world's ocean and are more productive than originally thought.
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On the relationships between primary, net community, and export production in subtropical gyres.
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As with other patches in each of the five oceanic gyres, the plastics in it break down to ever smaller particles, and to constituent polymers.
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Wind-driven surface currents interact with these gyres and the underwater topography, such as seamounts and the edge of continental shelves, to produce downwellings and upwellings.
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However, along the equatorial edge of the gyres, one finds a stagnant pool of water which has no direct connection to the ocean surface.
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As a result, large-scale horizontal flows of air or water tend to form clockwise-turning gyres.
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Using two downwelling inlets on both sides of the tank lets gravity create two gyres in the tank.
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Plastic debris tends to accumulate at the centre of ocean gyres.
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Picoplankton are responsible for the most primary productivity in oligotrophic gyres, and are distinguished from nanoplankton and microplankton.
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Information on gyres, currents, tides, and trade winds were all recorded and studied in order to determine if the information could benefit sailors.
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Like other subtropical gyres, it has a high-pressure zone in its center.
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Cyanobacteria remain critical to marine ecosystems as primary producers in oceanic gyres, as agents of biological nitrogen fixation, and, in modified form, as the plastids of marine algae.
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Pelagic plastic pieces in the center of our oceans gyres outnumber live marine plankton, and are passed up the food chain to reach all marine life.
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Flotsam can be blown by the wind, or follow the flow of ocean currents, often ending up in the middle of oceanic gyres where currents are weakest.
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