GEOSC EXAM 2 REVIEW - GEOSC EXAM 2 REVIEW Make sure that you understand the main aspects of the Coriolis effect(Test yourself draw a diagram of


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GEOSC EXAM 2 REVIEW- Make sure that you understand the main aspects of the Coriolis effect. (Test yourself – draw a diagram of atmospheric circulation patterns from memory.) - Coriolis effect deflects the path of moving objects - Influences the movement of air in atmospheric circulation cells - Creates curved surface flow paths What are the connections between large-scale wind patterns and the pattern of surface ocean circulation? - Surface winds influence the circulation of the ocean surface - Transfer of wind energy to ocean surface is not perfect… so ocean currents do not follow wind direction exactly - **Coriolis effect and Ekman Spiral - Connection b/w surface wind and ocean currents changes with depth - * Weaker connection with increasing depth - Surface currents are driven by the winds - Northern hemisphere currents flow to the right of the wind direction - Southern hemisphere currents flow to the left of the wind direction What is a gyre? What factors determine the large-scale pattern of surface ocean circulation in the N. Atlantic? - The flow in each ocean basin is called a gyre - North Atlantic gyre into 4 interconnected currents
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- Ocean water currents flow to the right of the wind direction - Eventually the currents approach land that, pushed the currents to turn clockwise even more to complete their circuit Are there any differences between the surface flow on the eastern and western side of ocean basins? What are the main characteristics of Eastern and Western Boundary Currents? - Western boundary currents: ~ 5 main currents- **gulf stream, japan current, brazil current, agulhas current, east Australian current ~ Fastest and deepest currents and usually narrow ~ Move warm water towards the poles ~ Carries large amounts of water ~ Sometimes form eddies (swirl or pocket of warm/cold water) ~ Little or no coastal upwelling ~ Water derived from trade wind belts - Eastern boundary currents: ~ 5 main currents- canary current, benguela current, California current, western Australian current, Peru current ~ Carry cold water towards the equator ~ Shallow and broad ~ Carries little amounts of water ~ Coastal upwelling common ~ Waters derived from mid-latitudes What are the similarities and differences between gyres and large-scale ocean surface currents in the northern and southern hemispheres? - They are similar in that they move in a circular motion, just in the opposite direction due to the Coriolis effect ~ Subtropical gyres rotate clockwise in N. hemisphere but counterclockwise in the S. hemisphere
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Large-scale pattern of winds. What are the main convection cells? Why do they produce a regular pattern of low and high pressure at specific latitudes? - Hadley cell (most near equator), Ferrel cell (middle), polar cell (near poles) - Because as air circulates away from the surface it creates low pressure, but continuing the circuit of air circulation, it will return back down toward the surface and create higher pressure.
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  • Spring '19
  • Ekman spiral, Physical oceanography, Neap Tides, shallow water, shallow water waves

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