An improved north–south synchronization of ice core records around the 41 kyr 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 ~41 kyr ago. We estimate the precision of...

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Bibliographic Details
Published in:Climate of the Past
Main Authors: Raisbeck, G., Cauquoin, Alexandre, Jouzel, J., Landais, A., Petit, J.-R., Lipenkov, V. Y., Beer, J., Synal, H.-A., Oerter, Hans, Johnsen, S. J., Steffensen, J. P., Svensson, A., Yiou, F.
Format: Article in Journal/Newspaper
Language:unknown
Published: COPERNICUS GESELLSCHAFT MBH 2017
Subjects:
Antarc*
Antarctic
Greenland
ice core
NGRIP
Online Access:https://epic.awi.de/id/eprint/44188/
https://epic.awi.de/id/eprint/44188/3/Raisbeck_et_al_2017_CP.pdf
https://epic.awi.de/id/eprint/44188/2/Raisbeck_et_al_2017_CP_Supplement.zip
https://hdl.handle.net/10013/epic.50575
https://hdl.handle.net/10013/epic.50575.d003
https://hdl.handle.net/10013/epic.50575.d002
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 ~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).

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