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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 6 | Copyright
Nonlin. Processes Geophys., 14, 723-733, 2007
https://doi.org/10.5194/npg-14-723-2007
© Author(s) 2007. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  26 Nov 2007

26 Nov 2007

Anti-persistence in the global temperature anomaly field

L. M. V. Carvalho1,3, A. A. Tsonis2, C. Jones3, H. R. Rocha1, and P. S. Polito4 L. M. V. Carvalho et al.
  • 1Dept. of Atmospheric Sciences, University of São Paulo, Brazil
  • 2Dept. of Mathematical Sciences, Atmospheric Sciences Group, University of Wisconsin, Milwaukee, USA
  • 3Institute for Computational Earth System Sciences, University of California, Santa Barbara, USA
  • 4Dept. of Physical Oceanography, University of São Paulo, Brazil

Abstract. In this study, low-frequency variations in temperature anomaly are investigated by mapping temperature anomaly records onto random walks. We show evidence that global overturns in trends of temperature anomalies occur on decadal time-scales as part of the natural variability of the climate system. Paleoclimatic summer records in Europe and New-Zealand provide further support for these findings as they indicate that anti-persistence of temperature anomalies on decadal time-scale have occurred in the last 226 yrs. Atmospheric processes in the subtropics and mid-latitudes of the SH and interactions with the Southern Oceans seem to play an important role to moderate global variations of temperature on decadal time-scales.

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