Oceanic Circulation 0.0 / 5 ? GeographyWeather systemsA2/A-levelAQA Created by: OctaviaLCreated on: 30-05-16 11:12 What is oceanic circulation? The large-scale movement of water within the oceans. 1 of 15 What is the role of oceanic circulation? Part of the horizontal transfer of heat from the tropics to the polar regions. 2 of 15 How much of the total transfer of heat within the energy budget is oceanic circulation responsible for? 20%. 3 of 15 What is a gyre? The circular pattern of currents for each ocean. 4 of 15 What sets ocean currents in motion? Prevailing surface winds. 5 of 15 What affects the direction of water? Coriolis force. 6 of 15 Which direction do ocean currents travel in the Northern hemisphere? Clockwise. 7 of 15 Which direction do ocean currents travel in the Southern hemisphere? Anticlockwise. 8 of 15 What does water density depend on? Water temperature and salinity. 9 of 15 Which side of ocean basins are major ocean currents especially dominant? Western. 10 of 15 When is the warming influence of ocean currents especially dominant? In winter between 40-65 where winds blow onshore on the Western side of continents. 11 of 15 Why do cold ocean currents have less effect on temperatures? They usually occur under offshore winds. 12 of 15 Where is the Labrador Current? What is it an exception to? East coast of North America. It is an exception to cold ocean currents having less effect on temperature. 13 of 15 Why is Western Europe warmer than it would otherwise be? Gulf Stream carries warm water from the Caribbean Sea along the East coast of North America to Western Europe. 14 of 15 What happens to some of the water in the Gulf Stream after it reaches Western Europe? It cools and sinks and is carried back to the equator by the Canary current which cools the West coast of Africa. 15 of 15
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