Reconstruction of global 10Be production over the past 250 ka from highly accumulating Atlantic drift sediments

In this study we present a reconstruction of the global 10Be production rate over the past 250,000 years from three marine sediment cores located in high accumulation environments in the North-, northwest-, and South Atlantic Ocean (ODP Sites 983, 1063 and 1089). The 10Be records are corrected for oceanic transport processes and Principal Component Analysis (PCA) is used to extract the common signal from the three records, which we interpreted as variations of the global 10Be production rate. The reconstruction presented here may serve as (i) a record of past flux of Galactic Cosmic Rays (GCR), (ii) a proxy for past geomagnetic dipole strength, and (iii) as a global matching tool to synchronize marine archives with ice cores and terrestrial records.