10.Oceanography

10.Oceanography - Basic Oceanography I. Factors that affect...

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Basic Oceanography Basic Oceanography I. Factors that affect physical I. Factors that affect physical oceanographic processes oceanographic processes II. Upwelling II. Upwelling III. Large-Scale Currents III. Large-Scale Currents IV. El Nino IV. El Nino V. Tsunamis V. Tsunamis
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Oceanography Overview What drives all this motion? What drives all this motion? 1) Solar Radiation 1) Solar Radiation 2) Rotation of the Earth 2) Rotation of the Earth
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Rotation of the earth produces Coriolis Force Rotation of the earth produces Coriolis Force Earth spins west to east (eastward) Earth spins west to east (eastward) Eastward velocity is greatest at equator and decreases Eastward velocity is greatest at equator and decreases poleward poleward (gravitational, pressure gradient, frictional, Coriolis) (gravitational, pressure gradient, frictional, Coriolis)
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Coriolis “Force” causes path of a moving object to be deflected to the right in the NH and to the left in SH relative to the surface of the earth
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Solar Radiation Solar Radiation 1) 1) Sun drives circulation by causing variation in Temp. Sun drives circulation by causing variation in Temp. 1) Sun drives ocean circulation through the circulation Sun drives ocean circulation through the circulation of the Atmosphere- winds of the Atmosphere- winds Energy transferred from winds to the upper layers of the Energy transferred from winds to the upper layers of the ocean ocean Changes in Temp. are caused by fluxes of heat across Changes in Temp. are caused by fluxes of heat across sea-air interface sea-air interface Changes in salinity caused by addition or removal of Changes in salinity caused by addition or removal of FW- evaporation or precipitation FW- evaporation or precipitation If surface water becomes more dense than underlying If surface water becomes more dense than underlying water, it sinks water, it sinks Thermohaline circulation Thermohaline circulation
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Solar Radiation Produces Winds Solar Radiation Produces Winds
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This note was uploaded on 08/06/2008 for the course ESM 260 taught by Professor Lenihan during the Spring '08 term at UCSB.

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10.Oceanography - Basic Oceanography I. Factors that affect...

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