Modeling studies of mesoscale circulation in the Gulf of California Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/n296x2688

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • The mesoscale circulation in the Gulf of California is investigated using a numerical model (Princeton Ocean Model). Forced by satellite-derived winds, the circulation in the gulf shows a complex pattern dominated in the southern gulf by multiple eddies. Near the coast and in most of the north gulf, the circulation is wind-driven. Away from the coast, velocity fluctuations are poorly correlated with the wind. Positive relative vorticity at the surface seems to be produced along the west side and to extend into the interior in the vicinity of cyclonic eddies. Negative vorticity values are significant near anticyclonic eddies and seem to be connected to the east coast. Regions of relatively high values of turbulent kinetic energy ½q² (≈10⁻⁴cm²s⁻²) are found in the interior away from the boundary layers at depths 350-500 m and are associated with low values of the Richardson number, negative relative vorticity and concentrations of near-inertial wave energy. In a separate set of experiments the evolution of remotely forced coastal-trapped waves in the gulf is studied. In general, model-data sea level and velocity fluctuations are reasonably well correlated. Coastaltrapped waves propagate northward along the east side of the gulf with no significant changes south of the sill. Most of the wave energy is steered at the sill to the west side of the gulf where it propagates southward with decreased sea level amplitude. Just a small fraction of the wave energy enters the northern gulf and is dissipated. Some of the incident wave energy is lost into down-slope propagating disturbances generated as the CTWs pass resulting in relatively intense bottom currents. Wave disturbances exhibit nonlinear characteristics while propagating. Most of the dissipation of wave energy in the gulf takes place through bottom friction in the vicinity of the sill. On the east side, large amplitude elevation waves produce a down-gulf current adjacent to the coast such that the up-gulf currents associated with the wave separate from the coast. Eddies with a spatial scale of 50-80 km are generated by long time scale or large amplitude waves.
License
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 256 Grayscale, 24-bit Color) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Anna Opoien(anna.opoien@oregonstate.edu) on 2011-08-30T16:01:38Z (GMT) No. of bitstreams: 1MartinezAlcalaJoseAntonio2002.pdf: 9032877 bytes, checksum: f6fc490d5f7ee806bc7a878bfce59d27 (MD5)
  • description.provenance : Approved for entry into archive by Anna Opoien(anna.opoien@oregonstate.edu) on 2011-08-30T22:48:36Z (GMT) No. of bitstreams: 1MartinezAlcalaJoseAntonio2002.pdf: 9032877 bytes, checksum: f6fc490d5f7ee806bc7a878bfce59d27 (MD5)
  • description.provenance : Submitted by Eric Vanderwall (ewscanner@gmail.com) on 2011-08-26T19:54:58ZNo. of bitstreams: 1MartinezAlcalaJoseAntonio2002.pdf: 9032877 bytes, checksum: f6fc490d5f7ee806bc7a878bfce59d27 (MD5)
  • description.provenance : Made available in DSpace on 2011-08-30T22:48:36Z (GMT). No. of bitstreams: 1MartinezAlcalaJoseAntonio2002.pdf: 9032877 bytes, checksum: f6fc490d5f7ee806bc7a878bfce59d27 (MD5) Previous issue date: 2002-03-22

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items