Nonlinearity and multifractality of climate change in the past 420,000 years

Yosef Ashkenazy*, Don R. Baker, Hezi Gildor, Shlomo Havlin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

131 Scopus citations

Abstract

Evidence of past climate variations are stored in polar ice caps and indicate glacial-interglacial cycles of ∼100 kyr. Using advanced scaling techniques we study the long-range correlation properties of temperature proxy records of four ice cores from Antarctica and Greenland. These series are long-range correlated in the time scales of 1-100 kyr. We show that these time series are nonlinear for time scales of 1-100 kyr as expressed by temporal long-range correlations of magnitudes of temperature increments and by a broad multifractal spectrum. Our results suggest that temperature increments appear in clusters of big and small increments- a big (positive or negative) climate change is most likely followed by a big (positive or negative) climate change and a small climate change is most likely followed by a small climate change.

Original languageAmerican English
Pages (from-to)CLM 2-1 - CLM 2-4
JournalGeophysical Research Letters
Volume30
Issue number22
DOIs
StatePublished - 15 Nov 2003
Externally publishedYes

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