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New Significance Test Methods for Fourier Analysis of Geophysical Time Series : Volume 18, Issue 5 (27/09/2011)

By Zhang, Z.

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Book Id: WPLBN0003983339
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: New Significance Test Methods for Fourier Analysis of Geophysical Time Series : Volume 18, Issue 5 (27/09/2011)  
Author: Zhang, Z.
Volume: Vol. 18, Issue 5
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Moore, J., & Zhang, Z. (2011). New Significance Test Methods for Fourier Analysis of Geophysical Time Series : Volume 18, Issue 5 (27/09/2011). Retrieved from

Description: College of Global Change and Earth System Science, Beijing Normal University, China. When one applies the discrete Fourier transform to analyze finite-length time series, discontinuities at the data boundaries will distort its Fourier power spectrum. In this paper, based on a rigid statistics framework, we present a new significance test method which can extract the intrinsic feature of a geophysical time series very well. We show the difference in significance level compared with traditional Fourier tests by analyzing the Arctic Oscillation (AO) and the Nino3.4 time series. In the AO, we find significant peaks at about 2.8, 4.3, and 5.7 yr periods and in Nino3.4 at about 12 yr period in tests against red noise. These peaks are not significant in traditional tests.

New significance test methods for Fourier analysis of geophysical time series

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