The Growth of Ice Crystals Formed from Frozen Solution Droplets: Laboratory Measurements and Power-law Parameterization

This data set comprises individual time series for ice crystals grown in an electrodynamic levitation diffusion chamber at temperatures between -61◦C and -40◦C. Descriptions of the chamber and experimental procedure can be found in Harrison et al. (2016), Pokrifka et al. (2020), and Pokrifka et al. (2023). Experiments were conducted by freezing small (approximately 12.5 micrometer radius) droplets homogeneously with either pure water or a 20% weight-percent sodium chloride (NaCl) solution. All particles 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. This ratio of the voltages 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 The initial sizes, environmental conditions, and solute for the particles have also been archived. The time elapsed until the particle froze (freezing point) has been recorded and is 0.0 if the particle was frozen before the data collection started. These data are described in an article that is in submission at the Journal of the Atmospheric Sciences (The Growth of Ice Crystals Formed from Frozen Solution Droplets: Laboratory Measurements and Power-law Parameterization, D. Rui, G.F. Pokrifka, A.M. Moyle, and J.Y. Harrington, submitted).

本数据集包含在电动悬浮扩散腔（electrodynamic levitation diffusion chamber）中生长的冰晶的单一时序数据，实验温度区间为-61℃至-40℃。该腔室与实验流程的详细说明可参见Harrison等人（2016）、Pokrifka等人（2020）及Pokrifka等人（2023）的研究成果。实验通过对半径约12.5微米的小液滴进行均匀冻结完成，所用试剂为纯水或质量分数20%的氯化钠（NaCl）溶液。所有颗粒均悬浮于该扩散腔中，在恒温、恒压及恒过饱和度的环境下生长。研究人员记录了悬浮颗粒所需电压随时间的变化，并以实验初始时刻的电压对该电压数据进行归一化处理。该电压比值即为悬浮颗粒的质量比，即生长中颗粒的质量与其初始质量的归一化比值。本数据集已归档该质量比的时序数据，同时归档了颗粒的初始尺寸、实验环境条件及所用溶质种类。实验记录了颗粒发生冻结所需的时长（冻结时间），若在数据采集开始前颗粒已完成冻结，则该时长记为0.0。相关数据的详细说明已收录于一篇投稿至《大气科学杂志（Journal of the Atmospheric Sciences）》的论文中，论文标题为《由冻结溶液液滴形成的冰晶生长：实验室测量与幂律参数化》，作者为D. Rui、G.F. Pokrifka、A.M. Moyle及J.Y. Harrington，目前处于投稿待刊状态。