Graduate Thesis Or Dissertation
 

Semidiurnal Atmospheric Tide Driven Superinertial Oscillation on the Texas-Louisiana Shelf

Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/f4752r06p

Descriptions

Attribute NameValues
Creator
Abstract
  • Basin-scale superinertial oceanic tides have been observed globally to resonate with the continental shelf (e.g., the Patagonian Shelf) with a clear theoretical framework. However, the response of the shelf to atmospheric tides – another basin-scale forcing – has not been discussed. This study explores this response using a prominent S2 atmospheric tidal wind series observed on the Texas-Louisiana Shelf in the summer of 2021. During the event, the amplitude of tidal wind stress (∼ 0.03 Pa) was as strong as half of the mean wind stress, resulting in synchronous oscillation of the ocean current with the S2 tidal wind. On the inner shelf, realistic numerical experiments indicate that the along-shore (cross-shore) near-surface flow reaches positive peaks at around 0100 and 1300 UTC (1000 and 2200 UTC). Meanwhile, the semidiurnal shoreward amplified sea surface height fluctuation remained in phase with velocity with an amplitude of 7 cm near the shore. The momentum budgets exhibit same oscillation, corresponding to the S2 tidal wind, sea surface tilt, and current oscillation. The budget indicates that the cross-shore pressure gradient force, the along-shore vertical stress divergence, and the Coriolis force mainly regulate the oscillation. Following a similar treatment for barotropic oceanic tides, we retrieve an analytical solution for the shelf oscillation with the along-shore homogeneous atmospheric tidal wind stress at the surface. It predicts the momentum budget well and implies that the Texas-Louisiana Shelf is possibly resonant with the S2 atmospheric tide.
License
Resource Type
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Rights Statement
Publisher
Peer Reviewed
Language

Relationships

Parents:

This work has no parents.

In Collection:

Items

Thumbnail Title Date Uploaded Visibility Actions
file details FucentHsuanWeiHsu_2023.pdf 2023-06-23 Public Download