Method for assessing the amplitude modulation of the stationary planetary waves

Details Method for assessing the amplitude modulation of the stationary planetary waves Method for assessing the amplitude modulation of the stationary planetary waves

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009angeo..27..617m&link_type=abstract

Annales Geophysicae, Volume 27, Issue 2, 2009, pp.617-622

Physics

1

Scientific paper

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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