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Authors: Elena Khapalova, Venkata Krishna Jandhyala, Stergios Fotopoulos
Title: [download]
(6486)
Change-Point Analysis of Annual Mean Precipitation for Northern, Tropical and Southern Latitudes of the Globe in the Past Century
Reference: Vol. 4, Issue 3, Apr 2013
Submitted 2012-10-02, Accepted 2013-01-23
Type: Article
Abstract:

Applying methods of change-point analysis, a statistical study of the annual mean precipitation from northern, tropical and southern latitudes of the globe is carried out based upon data for the past 100 years. The change-point analysis assumes multivariate Gaussianity for the time-series data, thus allowing spatial correlations between the three latitudes. Recently developed change detection and change-point estimation methods for multivariate Gaussian data are applied to analyze the data. A simulation study is also carried out in a bivariate set-up to investigate the robustness of the estimation methodology for deviation from Gaussianity as well as its sensitivity to estimation of the model parameters. Data analysis identifies a significant change in the precipitation from northern and southern latitudes subsequent to the year 1944, whereas no change was identified in the data from tropical latitude. The discussion suggests that the change found in the data from northern and southern latitudes may not have been entirely due to gauge changes introduced in and around 1950.

Paper: [download]
(6486)
Change-Point Analysis of Annual Mean Precipitation for Northern, Tropical and Southern Latitudes of the Globe in the Past Century
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