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TitleElectrodynamic Levitation Diffusion Chamber Measurements of the Mass Growth of Ice Crystals Grown from the Vapor at -65 to -40C.
Date2022
AbstractThis 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 The initial sizes, environmental conditions, and potential ice nuclei for the particles have also been archived.
MetadataClick here for full metadata
Data DOIdoi:10.26208/htw5-q166

Researchers
Pokrifka, G.
Penn State Department of Meteorology
Moyle, A.
Penn State Department of Meteorology
Harrington, J. Y.
Penn State Department of Meteorology

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References
Harrison, A., A. Moyle, M. Hanson, and J. Harrington, 2016: Levitation diffusion chamber measurements of the mass growth of small ice crystals from vapor. J. Atmos. Sci., 73, 2743–2758.
Pokrifka, G. F., A. M. Moyle, L. E. Hanson, and J. Y. Harrington, 2020: Estimating surface attachment kinetic and growth transition influences on vapor-grown ice crystals. J. Atmos. Sci., 77 (7), 2393 – 2410.
Pokrifka, G. F., A. M. Moyle, J. Y. Harrington, submitted to J. Atmos. Sci. 2022: Effective Density Parameterizations Derived from Laboratory Measurements of Vapor Growth Rates of Small Ice Crystals at -65 to -40C.