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Tellus (2011) C 2011 The Authors Tellus A C 2011 John Wiley & Sons A/S
 

Summary: Tellus (2011) C 2011 The Authors
Tellus A C 2011 John Wiley & Sons A/S
Printed in Singapore. All rights reserved
TELLUS
On the meridional structure of extra-tropical
Rossby waves
By YOSEF ASHKENAZY1, NATHAN PALDOR2
and YAIR ZARM I1
, 1
Solar Energy and
Environmental Physics, BIDR, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel; 2
Institute of
Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
(Manuscript received 27 June 2010; in final form 21 January 2011)
ABSTRACT
The common derivation of Rossby waves is based on the quasi-geostrophic approximation. A simple non-harmonic
approximation for extratropical Rossby waves on the sphere is proposed, in which the meridional coordinate is a
parameter instead of a continuous variable. It is shown that, in contrast to the quasi-geostrophic solution, to first order
the meridional structure of these non-harmonic Rossby waves becomes irrelevant for determining the dispersion relation
in this theory. The proposed approximation accurately reproduces numerical results obtained from runs of an ocean

  

Source: Ashkenazy, Yossi "Yosef" - Department of Solar Energy and Environmental Physics, Jacob Blaustein Institutes for Desert Research,Ben-Gurion University of the Negev

 

Collections: Physics; Environmental Management and Restoration Technologies