RAPID OSCILLATIONS IN VOSTOK AND GRIP ICE CORES

We investigate the spectral properties of climatic times series derive d from two recent ice cores in Greenland and East Antarctica. We find that the signals behave in a similar way in the high frequency part of their spectra. The rapid oscillations found in the GRIP ice core were closely correlated to Heinrich Events. A comparable spectra feature i s detected in the Vostok ice core. We discuss the possibilities of con nections between the two hemispheres and proper ice sheet oscillations in the light of simple oscillating climate models.