 |
| Titel |
Brief communication "On one mechanism of low frequency variability of the Antarctic Circumpolar Current" |
| VerfasserIn |
O. G. Derzho, B. Young |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 18, no. 3 ; Nr. 18, no. 3 (2011-06-16), S.361-365 |
| Datensatznummer |
250013922
|
| Publikation (Nr.) |
 copernicus.org/npg-18-361-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| In this paper we present a simple analytical model for low frequency and large scale
variability of the Antarctic Circumpolar Current (ACC).
The physical mechanism of the variability is related to temporal and
spatial variations of the cyclonic mean flow (ACC) due to circularly
propagating nonlinear barotropic Rossby wave trains. It is shown that the Rossby
wave train is a fundamental mode, trapped between the major fronts in the ACC.
The Rossby waves are predicted to rotate with a particular angular
velocity that depends on the magnitude and width of the mean
current. The spatial structure of the rotating pattern, including
its zonal wave number, is defined by the specific form of the stream
function-vorticity relation. The similarity between the simulated
patterns and the Antarctic Circumpolar Wave (ACW) is highlighted.
The model can predict the observed sequence of warm and cold patches
in the ACW as well as its zonal number. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|