Data Interpretation for Weather Extremes on the Basis of Quasiresonance Hypothesis of Blocking Formation
The quasiresonance hypothesis is used among other approximations for theoretical study of blocking formation in the recent years. It is propose the magnification of quasistationary waves resulted by thermal and orographic inhomogenities of underlying surface through quasiresonance. In this paper authors perform the interpretation of reanalysis and satellite data for weather extremes situations on the basis of quasiresonance hypothesis that describs mechanism of amplification for amplitudes of quasistationary waves. Base on the analysis of atmospheric waves parameters the situations favorable for realization of this mechanism were selected and described. The spatial distribution of the meridional velocity of atmospheric wind in troposphere was derived to illustrate all considered weather extreme situations. In all cases the conditions necessary for quasiresonance amplification are performed for wave modes with zonal wave numbers. All the considered weather extremes situations exhibit amplitudes for monthly Fourier components that are about 1.5 SD from the 1980-2011 monthly climatology data for the meridional velocity for the corresponding wave numbers.
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