G163S10L14_longwaves

G163S10L14_longwaves - LongWavesinOceanCirculation

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Long Waves in Ocean Circulation Wave response of ocean to transient  conditions such as changes in wind  forcing Two dominant wave types  Rossby waves - westward propagating  Kelvin waves - travel along boundaries Space scales of 100’s km & time scales of 
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More Long Waves  How ocean “communicates” within a basin Kelvin wave pulse is the precursor of an  ENSO event Hard to detect from direct field obs due to  the scales involved Satellite altimetry though is useful
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More Long Waves  Can be barotropic or baroclinic in nature Barotropic waves propagate fast  (many m/s) Baroclinic waves are slower  (several cm/s)
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Kelvin Waves  Needs boundary or “wave guide” to pile  against  Coastal boundary   The equator or “double” Kelvin wave Can be wave of depression or elevation How ENSO pulse is transmitted in ocean
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Kelvin Waves  Wave of depression Greatest onshore Propagates CCW in  a NH basin  (CW in  SH)
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This note was uploaded on 12/28/2011 for the course GEOG 163 taught by Professor Siegel,d during the Fall '08 term at UCSB.

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G163S10L14_longwaves - LongWavesinOceanCirculation

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