An improved north-south synchronization of ice core records around the 41kyr 10Be 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 ∼ 41kyr ago. We estimate the precision of...

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Bibliographic Details
Main Authors: Raisbeck, Grant M., Cauquoin, Alexandre, Jouzel, Jean, Landais, Amaelle, 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 in Journal/Newspaper
Language:English
Published: ETH Zurich 2017
Subjects:
Antarc*
Antarctic
Greenland
ice core
NGRIP
Online Access:https://dx.doi.org/10.3929/ethz-b-000129632
http://hdl.handle.net/20.500.11850/129632
Description
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 ∼ 41kyr 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). ... : Climate of the Past, 13 (3) ...

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