Article
 

Further Evidence for Coastal Trapped Waves along the Peru Coast

Öffentlich Deposited

Herunterladbarer Inhalt

PDF Herunterladen
https://ir.library.oregonstate.edu/concern/articles/j67315191

Descriptions

Attribute NameValues
Creator
Abstract
  • Time series of coastal sea level during 1976–77, from 2°12′S to 17°S along the west coast of South America, show that low-frequency, ω < 0.25 cycles per day (cpd), fluctuations propagate poleward with the phase speed of baroclinic Kelvin waves (2–3 m s⁻¹). The alongshore coherence is highest in the frequency band 0.1–0.2 cpd. Computing the frequency-domain empirical orthogonal functions (EOF) for alongshore current, from an army of current meters extending from 5°S to 15°S during March-May 1977, gives 70% of the variance in the 0.1–0.2 cpd frequency band to an EOF mode with poleward phase propagation at 2.75 m s⁻¹. The vertical structure of the alongshore current fluctuations (0.1–0.2 cpd) over the continental slope at 5°S and 15°S is consistent with a first-mode baroclinic Kelvin wave. The current and sea-level fluctuations are coherent and propagate poleward through latitudes where their frequency equals the local inertial frequency. The fluctuations are not significantly coherent with coastal winds from 4°S to 15°S and am therefore presumed to have an equatorial origin. Intermittent sea-level data at the Galapagos Islands during the period provide tenuous evidence that these fluctuations, propagating poleward as coastally trapped waves, previously traveled in the equatorial wave guide.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Romea, Richard D., Robert L. Smith, 1983: Further Evidence for Coastal Trapped Waves along the Peru Coast. Journal of Physical Oceanography, 13, 1341–1356.
Journal Title
Journal Volume
  • 13
Journal Issue/Number
  • 8
Urheberrechts-Erklärung
Funding Statement (additional comments about funding)
  • This paper has been completed with the support of National Science Foundation Grants OCE-8024116 and OCE-8017929.
Publisher
Peer Reviewed
Language
Replaces

Beziehungen

Parents:

This work has no parents.

Artikel

Miniaturansicht Titel Hochladedatum Sichtbarkeit Aktionen
file details SmithRobertL.CEOAS.FurtherEvidenceCoastal.pdf 2017-07-21 Öffentlich Herunterladen