Ice nucleating particle concentrations by droplet freezing assay measurements from the B17 ice core, Greenland, dating from 1370 to 1990 ...

• Main Authors: 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
• Format: Dataset
• Language: English
• Published: PANGAEA 2020
• Subjects: aerosol; climate; cloud formation; Ice core; Ice Nucleating Particles; Ice drill; NorthGreenlandTraverse; Sampling/drilling from ice; Greenland; ice core
• Online Access: https://dx.doi.org/10.1594/pangaea.922047; https://doi.pangaea.de/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). ...