Nonlinearity and Multifractality of Climate Change in the Past 420,000 Years

Details Nonlinearity and Multifractality of Climate Change in the Past 420,000 Years Nonlinearity and Multifractality of Climate Change in the Past 420,000 Years

2002-02-06

arxiv.org/abs/cond-mat/0202100v2

Physics

Condensed Matter

Statistical Mechanics

4 revtex pages, 4 figures, 1 table

Scientific paper

Evidence of past climate variations are stored in ice and indicate glacial-interglacial cycles characterized by three dominant time periods of 20kyr, 40kyr, and 100kyr. We study the scaling properties of temperature proxy records of four ice cores from Antarctica and Greenland. These series are long-range correlated in the time scales of 1-100kyr. We show that these series are nonlinear as expressed by volatility correlations and a broad multifractal spectrum. We present a stochastic model that captures the scaling and the nonlinear properties observed in the data.

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