Rapid oscillations in Vostok and GRIP ice cores 

Geophysical Research Letters, 22, p. 2179-2182, 1995. 

P. Yiou
Laboratoire de Modelisation du Climat et de l'Environnement, DSM-CEA, l'Orme des Merisiers, 91191 Gif-sur-Yvette Cedex, France.
J. Jouzel
S. Johnsen
Geofysisk Afdeling, Niels Bohr Instituttet for Astronomi, Fysik og Geofysik, Københavns Universitet
O.E. Rögnvaldsson

Investigates the spectral properties of climatic times series derived from two ice cores in Greenland and East Antarctica. The authors 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 spectral feature is detected in the Vostok ice core. The authors discuss the possibilities of connections between the two hemispheres and proper ice sheet oscillations in the light of simple oscillating climate models.