NGRIP ice-core volcanic sulfate concentration and deposition from 79.14 to 80.48 ka BP

• Main Authors: Sigl, Michael, Bigler, Matthias, Fischer, Hubertus
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Accumulation rate in ice equivalent per year; AGE; Calculated; running median; CFA; Conductivity; electrolytic; Continuous Flow Analysis; Corrected; Deposition of sulfate; volcanic; cumulative; DEPTH; ice/snow; Dust; insoluble; Glacial; Greenland; Ice core; ICEDRILL; Ice drill; NGRIP; NorthGRIP; particle mass concentration; Sampling/drilling ice; sulfate; background; sulfate aerosol; sulfate concentrations; volcanic activity; Volcanic aerosol; Annals of Glaciology; EPICA; Greenland ice core; Greenland Ice core Project; ice core; North Greenland; North Greenland Ice Core Project
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.960984; https://doi.org/10.1594/PANGAEA.960984

We present continuous records of 1 cm resolved sulfate concentrations, insoluble particle number and mass concentration, and liquid conductivity using a Continuous Flow Analysis (CFA) system (Bigler et al., 2002; Bigler et al., 2011; Erhardt et al., 2022) from the North Greenland Ice Core Project (NGRIP; 75.10°N, 42.33°W; 2941 m a.s.l.) and estimated volcanic sulfate mass depositions for the time period 79.14 and 80.48 ka BP on the GICC05modelext chronology, transferred to the AICC2012 chronology (Veres et al., 2013; Seierstad et al., 2014) using a common volcanic marker in EPICA Dome C ice core dated 79.51 ka BP. The reconstruction is based on sulfate measurements employing high-resolution continuous flow analysis. Volcanic eruptions are detected when annual sulfate concentrations exceeded the background concentrations + 4 times the median of the absolute deviation. Background concentrations are estimated using a 181-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.