Synchronization of polar climate variability over the last ice age: in search of simple rules at the heart of climate's complexity

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ID: 304964
2012
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Abstract
Evidence is presented supporting the hypothesis of polar synchronization, which states that during the last ice age, and likely in earlier times, millennial-scale temperature changes of the north and south Polar Regions were coupled and synchronized. The term synchronization as used here describes how two or more coupled nonlinear oscillators adjust their (initially different) natural rhythms to a common frequency and constant relative phase. In the case of the Polar Regions heat and mass transfer through the intervening ocean and atmosphere provided the coupling. As a working hypothesis, polar synchronization brings new insights into the dynamic processes that link Greenland9s Dansgaard-Oeschger (DO) abrupt temperature fluctuations to Antarctic temperature variability. It is shown that, consistent with the presence of polar synchronization, the time series of the most representative abrupt climate events of the last glaciation recorded in Greenland and Antarctica can be transformed into one another by a π/2 phase shift, with Antarctica temperature variations leading Greenland9s. This, plus the fact that remarkable close simulations of the time series are obtained with a model consisting of a few nonlinear differential equations suggest the intriguing possibility that there are simple rules governing the complex behavior of global paleoclimate.
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openalex_W2153989059 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors J. A. Rial
Journal american journal of science
Year 2012
DOI
10.2475/04.2012.02
URL
https://doi.org/10.2475/04.2012.02
Keywords Keywords not found

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