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Geophysical Monograph Series

 

Keywords

  • Atlantic meridional overturning circulation
  • solar centennial variability
  • ocean centennial variability
  • wavelets
  • empirical mode decomposition
  • modeling

Index Terms

  • 4215 Oceanography: General: Climate and interannual variability
  • 4901 Paleoceanography: Abrupt/rapid climate change
  • 4430 Nonlinear Geophysics: Complex systems

Article

GEOPHYSICAL MONOGRAPH SERIES, VOL. 193, PP. 161-171, 2011

The 1500 Year Quasiperiodicity During the Holocene

A. Ruzmaikin

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA


J. Feynman

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA


We investigate the quasiperiodic 1500 year oscillation in climate during the Holocene and its relation to the Atlantic meridional overturning circulation (AMOC). Our data analyses of paleodata reveal the nonlinear nature of this oscillation. The data analysis also indicates that the AMOC has two major equilibrium states characterized by a weak and a strong meridional flow in accord with modeling. Based on the results of the data analysis and earlier ideas about the origin of the 1500 year oscillation, we suggest a conceptual model explaining its origin. The model includes two basic equilibrium states. Transitions between the states are driven by noise and the combined action of the ocean centennial variability and the 90 year solar variability. We briefly discuss a relationship of the 1500 year millennium oscillation to the global warming problem.

Citation: Ruzmaikin, A., and J. Feynman (2011), The 1500 year quasiperiodicity during the Holocene, in Abrupt Climate Change: Mechanisms, Patterns, and Impacts, Geophys. Monogr. Ser., vol. 193, edited by H. Rashid, L. Polyak and E. Mosley-Thompson, pp. 161–171, AGU, Washington, D. C., doi:10.1029/2010GM001024.

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