Abstract: The effect of stochastic fluctuations in the zonal-mean velocity field on the energy dispersion of planetary stationary waves is considered, using the nondivergent, barotropic vorticity equation. It is found that for small ...

Abstract: A nonlinear principal component analysis (NLPCA) is applied to monthly mean zonal wind observations from January 1956 through December 2007 taken at seven pressure levels between 10 and 70 hPa in the stratosphere near the ...

Abstract: A nonlinear generalization of principal component analysis (PCA), denoted nonlinear principal component analysis (NLPCA), is applied to Northern Hemisphere wintertime geopotential heights at 1000, 700, 500, 300, and 20 ...