Burgay, FrançoisFrançoisBurgayErhardt, TobiasTobiasErhardt0000-0002-6683-6746Lunga, Damiano DellaDamiano DellaLungaJensen, Camilla MarieCamilla MarieJensenSpolaor, AndreaAndreaSpolaorVallelonga, PaulPaulVallelongaFischer, HubertusHubertusFischer0000-0002-2787-4221Barbante, CarloCarloBarbante2024-10-072024-10-072019https://boris-portal.unibe.ch/handle/20.500.12422/61168Volcanic eruptions are widely used in ice core science to date or synchronize ice cores. Volcanoes emit large amounts of SO₂ that is subsequently converted inthe atmosphere into sulfuric acid/sulphate.Its discrete and continuous quantification is currently used to determine the ice layers impacted by volcanic emissions, but available high-resolution sulphate quantification methods in ice core (Continuous Flow Analysis (CFA)) struggle with insufficient sensitivity. Here, we present a new high-resolution CFA chemiluminescence method for the continuous determination of Fe²⁺ species in ice cores thatshowsclear Fe²⁺ peaks concurrent with volcanicsulphate peaks in the ice core record. The method, applied on a Greenland ice core, correctly identifies all volcanic eruptions from between 1588 to 1611 and from 1777 to 1850. The method has a detection limit of ∽5pgg⁻¹ and a quadratic polynomial calibration range of up to at least 1760 pg g⁻¹. Our results show that Fe²⁺ is a suitable proxy for identifying past volcanic events.en500 - Science::530 - Physicsarticle10.7892/boris.12200310.1016/j.scitotenv.2018.11.075