Skip to main content

Free Content Barotropic variability in the presence of an ocean gyre

Download Article:
 Download
(PDF 2,641.2 kb)
 

Abstract:

We describe results from some idealized numerical calculations in which we examine the influence of a barotropically stable mean flow on wind-driven variability in a flat-bottomed barotropic vorticity equation model. The mean flow has features in common with the vertically integrated time-mean circulation found in eddy-resolving models with a Sverdrup interior, western boundary current and inertial recirculation region. We integrate the equations of motion linearized about this flow and driven by oscillating wind forcing and compare the results with those obtained when the mean state is one of rest. We find that the presence of a mean flow leads to significant distortion of the model response particularly near the western boundary and in the inertial recirculation region. This distortion is characterized by downstream amplification and phase lag compared to the rest mean state cases. It is related, on the one hand, to the distortion of the mean potential vorticity contours from lines of latitude and, on the other, to advection by the mean flow. Possible applications of these results are discussed to explain features of observed variability in the Gulf Stream system and also the anomalous southward intrusion of the Oyashio Current along the coast of Japan.

Document Type: Research Article

DOI: http://dx.doi.org/10.1357/002224090784984588

Publication date: February 1, 1990

More about this publication?
  • The Journal of Marine Research publishes peer-reviewed research articles covering a broad array of topics in physical, biological and chemical oceanography. Articles that deal with processes, as well as those that report significant observations, are welcome. In the area of biology, studies involving coupling between ecological and physical processes are preferred over those that report systematics. Authors benefit from thorough reviews of their manuscripts, where an attempt is made to maximize clarity. The time between submission and publication is kept to a minimum; there is no page charge.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Ingenta Connect is not responsible for the content or availability of external websites
jmr/jmr/1990/00000048/00000001/art00002
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more