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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/cp-2018-47
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-2018-47
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  18 May 2018

18 May 2018

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This preprint was under review for the journal CP but the revision was not accepted.

Teleconnection between the climates of the Polar Regions during the last ice age

Xiao Yang and Jose A. Rial Xiao Yang and Jose A. Rial
  • Department of Geological Sciences, University of North Carolina at Chapel Hill, NC 27514, USA

Abstract. Understanding the well-documented differences between Greenland and Antarctica's paleoclimate proxy time series in terms of the dynamic processes connecting the two Polar Regions would help develop a quantitative theory of polar climate teleconnections. Multiple conceptual models have been proposed to explain the polar climate time series relationship, and to extend Greenland climate records based on the much longer records from Antarctica. Here we compare the most relevant conceptual models proposed to characterize inter-polar teleconnections associated with these time series. We show that the polar synchronization model, which proposes that the climates of the Polar Regions were phase synchronized over most of the last ice age, shows better overall skill across the range of parameter space under test and provides a physical explanation of the polar teleconnection as the mutual synchronization of two nonlinear, coupled oscillators. Phase synchronization results when two or more nonlinear oscillators couple (in this case the two polar climates coupled through the ocean and atmosphere) and therein adjust their (initially different) natural rhythms to a common frequency and constant relative phase. Detailed analyses presented here show that the polar synchronization is a reliable framework to support further studies of polar climate teleconnections.

Xiao Yang and Jose A. Rial

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Xiao Yang and Jose A. Rial

Xiao Yang and Jose A. Rial

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Short summary
Climates of distant places are often teleconnected. One teleconnection connected climate changes in polar regions during the ice age. Conceptual models for this connection were also used to extend the shorter record. But comparing model skills in reproducing climate records is lacking. Here, we compared, both theoretically and empirically, three models. We found that model skills was controlled by the scale of temporal events targeted. Our results can guide future model application.
Climates of distant places are often teleconnected. One teleconnection connected climate changes...
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