Raw major element oxide data obtained by EPMA for volcanic events analysed from B19, TUNU2013, and RECAP ice cores (Greenland) between 750 and 940 CE

Raw major element oxide data for volcanic events analysed from B19 [78.00°N/36.40°W], TUNU2013 [78.04°N/33.88°W], and RECAP [71.3°N/26.7°W] ice cores (Greenland) across the period 750-940 CE. Data was obtained using electron probe micro-analysis (EPMA) at the University of Bern, Switzerland, Queen's University Belfast, UK, and University of Edinburgh, UK. Sample ID, sample depth (m), raw oxide values, and correlating horizon are provided.