An improved north–south synchronization of ice core records around the 41 kyr $^{10}$Be peak

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...

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Bibliographic Details
Published in:Climate of the past 2017, Vol.13 (3), p.217-229
Main Authors: Raisbeck, Grant M., Cauquoin, Alexandre, Jouzel, Jean, Landais, Amaëlle, Petit, Jean-Robert, Lipenkov, Vladimir Y., Beer, Juerg, Synal, Hans-Arno, Oerter, Hans, Johnsen, Sigfus J., Steffensen, Jorgen P., Svensson, Anders, Yiou, Françoise
Format: Article
Language:English
Subjects:
Continental interfaces, environment
Ocean, Atmosphere
Sciences of the Universe
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Summary: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).
ISSN:1814-9324
1814-9332
DOI:10.5194/cp-13-217-2017