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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1948
DTSTART:20100921T170500Z
DURATION:PT1H0M0S
DTSTAMP:20260311T161205Z
LAST-MODIFIED:20100913T153203Z
LOCATION:4274 Chamberlin Hall
SUMMARY:A New Dynamical Mechanism for Major Climate Shifts\, Chaos & C
 omplex Systems Seminar\, Anastasois Tsonis\, UW-Milwaukee Department o
 f Mathematical Sciences
DESCRIPTION:We construct a network of observed climate indices in the 
 period 1900-2000 and investigate their collective behavior. The result
 s indicate that this network synchronized several times in this period
 . We find that in those cases where the synchronous state was followed
  by a steady increase in the coupling strength between the indices\, t
 he synchronous state was destroyed\, after which a new climate state e
 merged. These shifts are associated with significant changes in global
  temperature trend and in ENSO variability. The latest such event is k
 nown as the great climate shift of the 1970s. We also find the evidenc
 e for such type of behavior in three climate simulations using a state
 -of-the-art model. This is the first time that this mechanism\, which 
 appears consistent with the theory of synchronized chaos\, is discover
 ed in a physical system of the size and complexity of the climate syst
 em. <br>
URL:https://www.physics.wisc.edu/events/?id=1948
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