Response of a Two-Layer Ocean with a Baroclinic Current to a Moving Storm. Part III. Barotropic and Baroclinic Modes.
Abstract
The normal mode equations for a two-layer ocean without current are scaled with characteristic distance, wind stress and time (or moving speed). When there is a geostrophic current in the upper layer, the normal mode separation is not possible, but equations for the barotropic transports include effects of the stationary current forcing terms as perturbation terms and the storm induced baroclinic transports as forcing functions. For a typical typhoon moving over the Kuroshio, the effects of the currents and the baroclinic transport become negligible for the barotropic transports which are determined by an iteration method. When the moving speed is less or more than about 5 m/sec, slow-moving or fast-moving approximation can be used. In the 1st case the interface shows almost uniform upwelling in a wake of the storm, and this is intensified slightly by the barotropic transports, particularly when the storm moves over the maximum current axis. In the 2nd case the interface shows undulated upwelling and effects of the barotropic transports become less than in the 1st case.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1976
- Accession Number
- ADA027423
Entities
People
- Michael Carnes
- Takashi Ichiye
Organizations
- Texas A&M University