GEOPHYSICAL MONOGRAPH SERIES, VOL. 193, PP. 161-171, 2011
The 1500 Year Quasiperiodicity During the Holocene
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