Speaker
Description
Cosmogenic 10Be records from ice cores are important proxies for reconstructing past solar activity. However, the incorporation of the isotope signal in ice is influenced by atmospheric transport and position processes, which can complicate the interpretation of the signal. Combining data from multiple sites may help reduce such noise and enhance the robustness of 10Be-based solar activity reconstructions. In this study, we present a new 10Be record from the North Greenland Eemian Ice Drilling (NEEM) ice core covering the period of 0–1650 CE. We find good agreement between the NEEM 10Be record and other ice core 10Be records from Greenland and Antarctica, and tree-ring 14C data, suggesting a common production signal. This finding is important for estimating and synchronizing solar imprints on the isotope production. However, incorporating the NEEM 10Be record into a stacked ice core 10Be dataset does not significantly improve its correlation with 14C. This indicates that site-specific influences may still affect the record and partially obscure the common production signal. In addition, potential climatic influences on the NEEM 10Be record are investigated by comparing it with chemical ion data from the same site. This approach can help better identification of local versus regional influences on the isotope record.