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On Quartet Interactions in the California Current System : Volume 21, Issue 4 (29/08/2014)

By Ivanov, L. M.

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Book Id: WPLBN0004016173
Format Type: PDF Article :
File Size: Pages 14
Reproduction Date: 2015

Title: On Quartet Interactions in the California Current System : Volume 21, Issue 4 (29/08/2014)  
Author: Ivanov, L. M.
Volume: Vol. 21, Issue 4
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Collins, C. A., Ivanov, L. M., & Margolina, T. M. (2014). On Quartet Interactions in the California Current System : Volume 21, Issue 4 (29/08/2014). Retrieved from http://worldebookfair.org/


Description
Description: Naval Postgraduate School, Monterey, California, USA. Sea surface height (SSH) altimetry observations for 1992 to 2009 off California are used to show that observed quasi-zonal jets were likely driven by near-resonance interactions between different scales of the flow. Quartet (modulational) instability dominated and caused non-local transfer of energy from waves and eddies to biannual oscillations and quasi-zonal jets. Two types of quartets were identified: those composed of scales corresponding to (a) quasi-zonal jets, annual and semiannual Rossby waves and mesoscale eddies, and (b) biannual oscillations, semiannual Rossby waves and mesoscale eddies. The spectral centroid regularly shifted into the domain of low-order modes. However, the spectrum of SSHs does not demonstrate a power behavior. This says that the classical inverse cascade is absent. For a case with bottom friction, quartet instability required the existence of a certain level of dissipativity in the flow.

Summary
On quartet interactions in the California Current system

Excerpt
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