EDML ice-core volcanic sulfate concentration and deposition from 78.97 to 79.97 ka BP

• Main Authors: Sigl, Michael, Severi, Mirko
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Accumulation rate in ice equivalent per year; AGE; Antarctica; Calculated; running median; CFA; Continuous Flow Analysis; Corrected; Deposition of sulfate; volcanic; cumulative; DEPTH; ice/snow; EDML; EDRILL; EPICA-Campaigns; EPICA drill; EPICA Dronning Maud Land; DML28C01_00; Ice core; Kohnen Station; sulfate; background; sulfate aerosol; sulfate concentrations; volcanic activity; volcanic eruption; volcanism; Dronning Maud Land; Kohnen; Severi; Antarc*; EPICA; ice core
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.962785; https://doi.org/10.1594/PANGAEA.962785

We present continuous records of ca. 2 cm resolved sulfate concentrations using a Continuous Flow Analysis (CFA) system (Röthlisberger et al., 2000; Severi et al., 2007; Wegner et al., 2015) from the EPICA Dronning Maud Land (EDML; 75.00°S, 00.07°E; 2892 m a.s.l.) ice core and estimated volcanic sulfate mass depositions for the time period 78.97 to 79.97 ka BP on the AICC2012 chronology (Veres et al., 2013) using a common volcanic marker in EDC dated 79.51 ka BP. The reconstruction is based on sulfate measurements employing high-resolution continuous flow analysis coupled to Fast Ion Chromatography. Volcanic eruptions are detected when annual sulfur concentrations exceeded the background concentrations + 4 times the median of the absolute deviation. Background concentrations are estimated using a 101-point running median. Volcanic sulfate deposition rates are calculated by subtracting the background concentrations from total sulfate concentrations using thinning corrected estimates of mean ice accumulation rates at the ice-core site.