1CSNSM, CNRS, Université Paris-Saclay, Bats 104–108, 91405 Campus,
2LSCE/IPSL, CEA-CNRS-UVSQ), CEA Saclay Orme des Merisiers, 91191
3LGGE, CNRS, BP 96, 38402, St Martin d'Hères CEDEX, France
4Arctic and Antarctic Research Institute, 38 Bering St., St. Petersburg
5Eawag, Überlandstrasse 133, Postfach 611, 8600 Dübendorf,
6Laboratory of Ion Beam Physics, ETH Zurich, 8093 Zurich, Switzerland
7Alfred Wegener Institute for Polar and Marine Research, 27570
8Centre for Ice and Climate, Niels Bohr Institute, University of
Copenhagen, Copenhagen, Denmark
Received: 10 Jul 2016 – Discussion started: 28 Jul 2016
Abstract. Using new high-resolution 10Be measurements in the NGRIP, EDML and Vostok ice cores, together with previously published data from EDC, we present an improved synchronization between Greenland and Antarctic ice cores during the Laschamp geomagnetic excursion ∼ 41 kyr ago. We estimate the precision of this synchronization to be ±20 years, an order of magnitude better than previous work. We discuss the implications of this new synchronization for making improved estimates of the depth difference between ice and enclosed gas of the same age (Δdepth), difference between age of ice and enclosed gas at the same depth (Δage) in the EDC and EDML ice cores, spectral properties of the 10Be profiles and phasing between Dansgaard–Oeschger-10 (in NGRIP) and AIM-10 (in EDML and EDC).
Revised: 17 Dec 2016 – Accepted: 05 Feb 2017 – Published: 10 Mar 2017
Raisbeck, G. M., Cauquoin, A., Jouzel, J., Landais, A., Petit, J.-R., Lipenkov, V. Y., Beer, J., Synal, H.-A., Oerter, H., Johnsen, S. J., Steffensen, J. P., Svensson, A., and Yiou, F.: An improved north–south synchronization of ice core records around the 41 kyr 10Be peak, Clim. Past, 13, 217-229, doi:10.5194/cp-13-217-2017, 2017.