Observed Interaction between Low and High Frequency Motions off the Coasts of Peru and California Public Deposited

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  • Datasets taken near the coasts of Peru and California have been analyzed to explore the evidence of a correlation between the high frequency (period < 10.8 hour) and low frequency (period > 4 day) motions. A large part of the high frequency current is consistent with internal wave dynamics. They have a near 180° phase change across the water column; there is also evidence of a clockwise veering with depth, presumably due to frictional effects. No correlation of the vertical Reynolds stress and vertical shear V𝓏 is found. The horizontal stress is found to be negatively correlated with the horizontal shear Vₓ only when averaged over time and space scales larger than those of the mean velocity field. The implied eddy viscosity is of order ᵥₕ ∼ 10⁵ cm² s⁻¹. It is suggested that the relaxation time for the wave field to lose asymmetry is larger than the time for the wave to propagate across a typical scale of the mean shear field. Due to this the fluctuating field may locally behave like a negative eddy viscosity at certain places.
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  • Kundu, Pijusi K., Robert C. Beardsley, Adriana Huyer, 1990: Observed Interaction between Low and High Frequency Motions off the Coasts of Peru and California. J. Phys. Oceanogr., 20, 1333–1348.
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  • Journal of Physical Oceanography
  • Vol. 20, No. 9
  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2012-01-25T18:01:19ZNo. of bitstreams: 1HuyerAdriana.CEOAS.ObservedInteractionBetween.pdf: 994636 bytes, checksum: 9b046f1fc71831aa161491d4e273effa (MD5)
  • description.provenance : Made available in DSpace on 2012-01-25T18:01:19Z (GMT). No. of bitstreams: 1HuyerAdriana.CEOAS.ObservedInteractionBetween.pdf: 994636 bytes, checksum: 9b046f1fc71831aa161491d4e273effa (MD5) Previous issue date: 1990-09

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