Schrod, Jann; Kleinhenz, Dominik; Hörhold, Maria; Erhardt, Tobias; Richter, Sarah; Wilhelms, Frank; Fischer, Hubertus; Ebert, Martin; Twarloh, Birthe; Della Lunga, Damiano; Jensen, Camilla Marie; Curtius, Joachim; Bingemer, Heinz G (2020): Ice nucleating particle concentrations by droplet freezing assay measurements from the B17 ice core, Greenland, dating from 1370 to 1990 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.922047

The data set reports on measurements of ice nucleating particles (INPs) from an ice core in Greenland (B17, 72.25, -37.25, 2820 m AMSL) that dates back to about 1370. INP measurements were performed using the FRIDGE INP counter as a droplet freezing assay for N = 135 meltwater samples from the core. From each sample 3 x 65 droplets of melt water (2.5 µL) were pipetted onto a sample substrate. The experimental nucleation temperature T was decreased at 1 °C/min until every droplet was frozen. The frozen fraction (FF) as a function of T is used to calculate the INP abundance per mL of melt water. A conversion factor is used to estimate atmospheric INP concentrations. The typical time coverage of a sampe is in the order of a couple of months. Samples were selected in regular time intervals of 10 years, plus a number of additional samples. This data supplement is related to a scientific publication (doi:10.5194/acp-2020-556).