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Es 4 final part 2

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eshapeesha's version from 2016-06-05 13:45

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Question Answer
what factors come together to create ocean gyres? how do these interplaydriven by winds, coreolis effect, eckman spiraling, and gravity. easterlie and westerlie winds (but esp east) push water, creating friction between the wind and the water. causing deflection creating a circular motion. gravity pulls water down hills, against the pressure gradient. but the coriolis effect causes water to move east around the hill.
eckman spiral and how it affects currentswind force goes one way while direction of motion spirals due to friction. wind pushes a water column one way and the rest follow, eventually going a different direction than the current at the bottom.
coriolis' effect on currents causes currents to spin clockwise in the north and to the left in the south
What are the characteristics of ocean gyres? Why is the hill offset? Where is the energy coming from that pushes the water? large mounds of water and the flow around them. large system of circular ocean currents formed by global wind patterns and forces created by Earth’s rotation. the hill is offset bc the coriolis effect is more intense on the west. wind pushes the water.
What are the different boundary currents and what are their distinctive properties?eastern boundary current are slow, bring water from the poles to the equator, and feed water that will get heated at the poles. western boundary currents are narrow, fast, and deep and they move poleward in each gyre.
What is an Eckman spiral (aka Eckman flow), and how does the direction of flow differ at the surface compared to the net flow at depth? How does the flow direction at depth relate to the winds?Beneath surface currents of the gyre, the Coriolis effect results in what is called an Ekman spiral. wind force goes one way while direction of motion spirals due to friction. wind pushes a water column one way and the rest follow, eventually going a different direction than the current at the bottom.
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