Beryllium 10 in Antarctica over the last seven millennia.

ABSTRACT: Since the first measurements of beryllium 10 (¹⁰Be) in ice, in the seventies, numerous profiles of this cosmogenic isotope have been obtained both in Antarctica and Greenland. In this article, we focus on Antarctic data, available at nine different sites, covering a significant part of the Holocene, from 237 to 7101 yr BP. We show that correlating their ¹⁰Be profiles allows to synchronize these ice cores with an excellent accuracy and to document the spatial variability of ¹⁰Be concentration and flux. We then examine how this variability is taken into account by a simulation of ¹⁰Be fallout recently performed with the ECHAM6.3-HAM2.3 model. Except for a systematic underestimation of ¹⁰Be fluxes at high accumulation sites, these simulat

SUBMITTER: Jouzel J 

PROVIDER: S-EPMC12858830 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature