Physics – Geophysics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3413705t&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 13, CiteID L13705
Physics
Geophysics
22
Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Global Change: Climate Dynamics (0429, 3309), Mathematical Geophysics: Time Series Analysis (1872, 4277, 4475), Nonlinear Geophysics: Complex Systems, Nonlinear Geophysics: Instruments And Techniques
Scientific paper
We construct a network of observed climate indices in the period 1900-2000 and investigate their collective behavior. The results 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, the synchronous state was destroyed, after which a new climate state emerged. These shifts are associated with significant changes in global temperature trend and in ENSO variability. The latest such event is known as the great climate shift of the 1970s. We also find the evidence for such type of behavior in two 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 discovered in a physical system of the size and complexity of the climate system.
Kravtsov Sergey
Swanson Kyle
Tsonis Anastasios A.
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