Nonlinear comparative analysis of Greenland and Antarctica ice cores data
Berenice Rojo-Garibaldi,
Alberto Isaac Aguilar-Hernández,
Gustavo Martínez–Mekler
Abstract:We analyze the temperature time series of the EPICA Dome C ice cores in Antarctica and of the Greenland project, Summit, with durations of 800 000 and 248 000 years, respectively, with a recent mathematical tool defined through the Fourier phases of the series, known as the J-index. This data driven index can differentiate between purely random dynamics and dynamics with a deterministic component. It is sensitive to nonlinear components and robust to the presence of noise. Our J-index data analysis shows that … Show more
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