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

Summary: Nonlinearity and multifractality of climate change in the past
420,000 years
Yosef Ashkenazy,1
Don R. Baker,2,3
Hezi Gildor,4
and Shlomo Havlin5
Received 3 July 2003; revised 2 October 2003; accepted 17 October 2003; published 20 November 2003.
[1] 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 1100 kyr. We
show that these time series are nonlinear for time scales of
1100 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

  

Source: Ashkenazy, Yossi "Yosef" - Department of Solar Energy and Environmental Physics, Jacob Blaustein Institutes for Desert Research,Ben-Gurion University of the Negev

 

Collections: Physics; Environmental Management and Restoration Technologies