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Brief Communication on One Mechanism of Low Frequency Variability of the Antarctic Circumpolar Current : Volume 18, Issue 3 (16/06/2011)

By Derzho, O. G.

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Book Id: WPLBN0003974831
Format Type: PDF Article :
File Size: Pages 5
Reproduction Date: 2015

Title: Brief Communication on One Mechanism of Low Frequency Variability of the Antarctic Circumpolar Current : Volume 18, Issue 3 (16/06/2011)  
Author: Derzho, O. G.
Volume: Vol. 18, Issue 3
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Young, B. D., & Derzho, O. G. (2011). Brief Communication on One Mechanism of Low Frequency Variability of the Antarctic Circumpolar Current : Volume 18, Issue 3 (16/06/2011). Retrieved from http://hawaiilibrary.net/


Description
Description: Department of Physics and Physical Oceanography, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada. 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.

Summary
Brief communication On one mechanism of low frequency variability of the Antarctic Circumpolar Current

Excerpt
Gille, S. T.: Mean sea surface height of the antarctic circumpolar current from geosat data: methods and application, J. Geophys. Res., 99(C9), 18255–18273, 1994.; Jacobs, G. A. and Mitchell, J. L.: Ocean circulation variations associated with the antarctic circumpolar wave, Geophys. Res. Lett., 23, 2947–2950, 1996.; Rintoul, S. R., Hughes, C. W., and Olbers, D.: The Antarctic Circumpolar Current system, in: Ocean Circulation and Climate, edited by: Siedler, G., Church, J., and Gould, J., International Geophysical Series, Academy Press, New York, 271–302, 2001.; Sarukhanian, E. I.: Structure and Variability of the Antarctic Circumpolar Current, Oxonian Press, New Delhi, 1985.; Stern, M.: Minimal properties of planetary eddies, J. Mar. Res., 33, 1–13, 1975.; Venegas, S. A.: The Antarctic Circumpolar Wave: A Combination of Two Signals?, J. Climate, 16, 2509–2525, 2003.; White, W. B. and Peterson, R. G.: An antarctic circumpolar wave in surface pressure, temperature and sea-ice extent, Nature, 380, 699–702, 1996.

 

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