A high-resolution ¹⁰Be profile from deep sea sediment covering the last 70 Ka: Indication for globally synchronized environmental events

We present a high-resolution ¹⁰Be profile from deep sea sediments (sampled from Hole 502B in the Caribbean sea) that strongly resembles the ¹⁰Be record in ice core profiles, particularly the Vostok core from Antarctica. This high-resolution profile revealed occurrences of enhanced ¹⁰Be concentrations at about 23-24, 37-39 and 60-65 ka. The excellent match between these peaks appearing in a georeservoir profile other than in polar ice, strengthens the implications that can be inferred from ¹⁰Be and provide global markers for chronological correlation of climatic events. The position at low latitude of the studied sediment section is, unlike the case with the high latitude polar regions, excellent for exposing causes of modulation in ¹⁰Be production. We interpret the source of the pattern and enhancements, particularly the 37-39 ka peak, of ¹⁰Be to be global and do not strictly relate to climatic conditions and/or production rates specific to the polar regions.