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Ocean gyre: Quiz


Question 1: Gyres are caused by the ________; planetary vorticity along with horizontal and vertical friction, which determine the circulation patterns from the wind curl (torque).
Thermohaline circulationOcean gyreCoriolis effectGulf Stream

Question 2: This drives the Ekman transport, which creates an ________ of nutrient-rich water from the lower depths.
Water columnUpwellingHumboldt CurrentHydrothermal vent

Question 3: A gyre in ________ is any large system of rotating ocean currents, particularly those involved with large wind movements.
OceanographyHydrologyCoastal geographyPhysical oceanography

Question 4: Circulation around the high pressure is clockwise in the northern hemisphere and counterclockwise in the southern hemisphere, due to the ________.
Thermohaline circulationGulf StreamCoriolis effectOcean gyre

Question 5: Subpolar circulation in the southern hemisphere is dominated by the Antarctic Circumpolar Current, due to the lack of large landmasses breaking up the ________.
Indian OceanAtlantic OceanPacific OceanSouthern Ocean

Question 6: Circulation of surface wind and ocean water is counterclockwise in the Northern Hemisphere, around a ________, such as the persistent Aleutian Low and the Icelandic Low.
Low-pressure areaPrecipitation (meteorology)CycloneTropical cyclone

Question 7: The intensified western boundary current of the North Atlantic Gyre is the ________, in the North Pacific it's the Kuroshio Current, in the South Atlantic it's the Brazil Current, in the South Pacific it's the East Australian Current, and in the Indian Ocean it's the Agulhas Current.
Ocean currentCoriolis effectThermohaline circulationGulf Stream

Question 8: [1] The term gyre can be used to refer to any type of ________ in the air or the sea, even one that is man-made, but it is most commonly used in oceanography, to refer to the major ocean systems.
VortexVorticityLift (force)Fluid dynamics


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