Method for assessing the amplitude modulation of the stationary planetary waves

This short-communication presents a new method for assessing the amplitude modulation of the stationary planetary waves (SPWs). The suggested procedure allows estimating the contribution of the amplitude modulated SPWs to the field of the zonally travelling planetary waves. The root of the method co...

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Bibliographic Details
Published in:Annales Geophysicae
Main Authors: Mukhtarov, P., Pancheva, D., Andonov, B.
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2009
Subjects:
article
Verlagsveröffentlichung
Arctic
Online Access:https://doi.org/10.5194/angeo-27-617-2009
https://noa.gwlb.de/receive/cop_mods_00030690
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00030644/angeo-27-617-2009.pdf
https://angeo.copernicus.org/articles/27/617/2009/angeo-27-617-2009.pdf
Description
Summary:This short-communication presents a new method for assessing the amplitude modulation of the stationary planetary waves (SPWs). The suggested procedure allows estimating the contribution of the amplitude modulated SPWs to the field of the zonally travelling planetary waves. The root of the method consists in calculating of a quantity that is analogous to 2-D Lomb-Scargle amplitude spectrum and also the relative error of the approximation. The amplitude "spectra" of the SPWs give information about the period(s) of modulation, while the relative errors - define the coefficient(s) of modulation. The suggested method is applied to the UKMO temperature data for the Arctic winter of 2004–2005.

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