Article

 

Note on a baroclinic analogue of vorticity defects in shear Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/db78td643

Descriptions

Attribute NameValues
Creator
Abstract
  • An approach developed recently to study the dynamics of vorticity defects in homogeneous shear flow extends naturally to the case of baroclinic, quasi-geostrophic flow. It is shown that an inviscid geostrophic flow with uniform vertical shear may be destabilized by introducing a `potential vorticity defect', an arbitrarily small but sufficiently sharp and horizontally uniform change in stratification or vertical shear. The linear baroclinic problem is nearly identical to the linear homogeneous problem, with differences arising only from the boundary conditions. The nonlinear baroclinic problem differs substantially from the nonlinear homogeneous problem, as the leading-order baroclinic nonlinearity is the Jacobian of the `inner' streamfunction and potential vorticity in the horizontal plane aligned with the defect. An example of the linear instability is described.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Samelson, R. M. (1999). Note on a baroclinic analogue of vorticity defects in shear [Electronic version]. Journal of Fluid Mechanics, 382, 367-373.
Journal Title
Journal Volume
  • 382
Rights Statement
Publisher
Language
Replaces
Additional Information
  • description.provenance : Submitted by David Moynihan (dmscanner@gmail.com) on 2010-07-29T16:52:53Z No. of bitstreams: 1 Samelson_J_Fluid_Mech_1999.pdf: 286888 bytes, checksum: 01f77a968429285a9483b76b1f5e478a (MD5)
  • description.provenance : Approved for entry into archive by Sue Kunda(sue.kunda@oregonstate.edu) on 2010-08-05T22:21:12Z (GMT) No. of bitstreams: 1 Samelson_J_Fluid_Mech_1999.pdf: 286888 bytes, checksum: 01f77a968429285a9483b76b1f5e478a (MD5)
  • description.provenance : Made available in DSpace on 2010-08-05T22:21:12Z (GMT). No. of bitstreams: 1 Samelson_J_Fluid_Mech_1999.pdf: 286888 bytes, checksum: 01f77a968429285a9483b76b1f5e478a (MD5) Previous issue date: 1999-03

Relationships

Parents:

This work has no parents.

Items