Electrodynamic Levitation Diffusion Chamber Measurements of the Mass Growth of Ice Crystals Grown from the Vapor at -65 to -40C

This data set comprises individual time-series for ice crystals grown in an electrodynamic levitation diffusion chamber at temperatures between -65 and -40C. Descriptions of the chamber and experimental proceedure can be found in Harrison et al. (2016), Pokrifka et al. (2020), and Pokrifka et al. (submitted to J. Atmos. Sci. 2022). Experiments were conducted by freezing small (approximately 10 micrometer radius) droplets either homogeneously or heterogeneously with a 0.2 g/L Snomax mixture. Frozen droplets were levitated in the diffusion chamber and grown in a constant temperature, pressure, and supersaturation environment. The voltage needed to levitate the particle was recorded as a function of time, then it was normalized by the voltage at the beginning of the experiment. The ratio of the voltage is mass ratio of the levitated particles, which is the mass of the growing particle normalized by its initial mass. The mass ratio time-series are archived here. The initial size of the droplet was also measured, and therefore the mass time-series can be calculated from the mass ratio time-series. The initial sizes, environmental conditions, and potential ice nuclei for the particles have also been archived.