Advances in Geophysics, Vol. 41 by Renata Dmowska, Barry Saltzman PDF

By Renata Dmowska, Barry Saltzman

ISBN-10: 0120188414

ISBN-13: 9780120188413

This sequence offers a venue for longer experiences of present advances in geophysics. Written at a degree obtainable to graduate scholars, the articles serve to expand wisdom of varied fields and should be priceless in classes and seminars.

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We demonstrate this frequency-independence of the null distribution of the LFV spectrum using the specific example of spatially correlated red noise, showing the virtual independence of the LFV spectrum of the level of temporal autocorrelation in the data set. There is nothing preferential about the ARŽ1. colored-noise model, however, and in fact the LFV exhibits a universal null distribution for any smoothly varying colored-noise process with a given number of spatial degrees of freedom. , the noise model of Wigley and Raper, Ž1990.

Actual reference time-domain signal Žsee Fig. 2. is shown by dashed curve for comparison to reconstructed signal. From Mann Ž1998.. OSCILLATORY SPATIOTEMPORAL SIGNAL DETECTION 45 as discussed later, some of the deficiencies inherent in joint-field decompositions are avoided when performed in the context of MTM-SVD. In the event where more than one signal is present within the narrow bandwidth of spectral estimation, however, problems and ambiguities similar to those encountered in traditional PCA can arise.

Is formed with each row calculated from a different gridpoint time series and each column using a different Slepian taper. The wm represent spatially variable weights to adjust for relative areas of gridpoints, etc. , Marple, 1987. is performed of the above matrix, AŽ f . K Ý ␭ k Ž f . u k Žf. k † vk Ž 14. , and K orthonormal K-vectors vk Žtermed ‘‘spectral EOFs’’ by Mann and Park, 1994. which we will term here ‘‘principal modulations’’ in analogy with ‘‘principal components’’ of a time-domain eigendecomposition.

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Advances in Geophysics, Vol. 41 by Renata Dmowska, Barry Saltzman

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