Beryllium-10 concentration in the EPICA Dome C core between 2384.36 and 2626.25 m deep (269-355 ka on the EDC3 age scale) ...

Ice cores are exceptional archives which allow us to reconstruct a wealth of climatic parameters as well as past atmospheric composition over the last 800 kyr in Antarctica. Inferring the variations in past accumulation rate in polar regions is essential both for documenting past climate and for ice...

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Bibliographic Details
Main Authors: Cauquoin, Alexandre, Landais, Amaëlle, Raisbeck, Grant M, Jouzel, Jean, Bazin, Lucie, Kageyama, Masa, Peterschmitt, Jean-Yves, Werner, Martin, Bard, Edouard, ASTER Team
Format: Dataset
Language:English
Published: PANGAEA 2015
Subjects:
DEPTH, ice/snow
Beryllium-10, water
Reference of data
Ice drill
Dome C
European Project for Ice Coring in Antarctica EPICA
Antarc*
Antarctic
Antarctica
East Antarctica
EPICA
ice core
Online Access:https://dx.doi.org/10.1594/pangaea.868834
https://doi.pangaea.de/10.1594/PANGAEA.868834
Description
Summary:Ice cores are exceptional archives which allow us to reconstruct a wealth of climatic parameters as well as past atmospheric composition over the last 800 kyr in Antarctica. Inferring the variations in past accumulation rate in polar regions is essential both for documenting past climate and for ice core chronology. On the East Antarctic Plateau, the accumulation rate is so small that annual layers cannot be identified and accumulation rate is mainly deduced from the water isotopic composition assuming constant temporal relationships between temperature, water isotopic composition and accumulation rate. Such an assumption leads to large uncertainties on the reconstructed past accumulation rate. Here, we use high-resolution beryllium-10 (10Be) as an alternative tool for inferring past accumulation rate for the EPICA Dome C ice core, in East Antarctica. We present a high-resolution 10Be record covering a full climatic cycle over the period 269 to 355 ka from Marine Isotope Stage (MIS) 9 to 10, including a ... : To calculate the flux of 10Be: See equation 6 in Cauquoin et al. (2015) --> F(10Be) = C(10Be) x A x ice_density with A the accumulation rate and the ice density = 0.917 g/cm**3. Correction for the radioactive decay: x exp( ln2 / t1/2 x age) with t1/2 = 1390000 years.Projects: "French ANR project Dome A", "ERC grant COMBINISO (project no. 306045)", and "ASTER AMS national facility (CEREGE, Aix en Provence) supported by the INSU/CNRS, and the ANR through the ?Projets thématiques d'excellence? programme for the ?Equipements d'Excellence? ASTER-CEREGE action, IRD, and CEA". ...

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