The uptake of hydrochloric acid (HCl), ethanol (C2H5OH), 1-butanol (1-C4H9OH), formic acid HC(O)OH and trifluoroacetic (CF3C(O)OH) acid to growing ice surfaces was investigated at temperatures between 194 and 228K. HCl displayed extensive, continuous uptake during ice growth, which was strongly dependent on the ice growth velocity, the temperature of the ice surface and the gas phase concentration of HCl. Trifluoroacetic acid was also observed to be trapped in growing ice, albeit approximately an order of magnitude less efficiently than HCl, whereas the adsorption and desorption kinetics of ethanol, 1-butanol, formic acid on ice were not measurably different to those for non-growing ice, even at very high ice growth rates. We present a parameterisation of the uptake coefficient for HCl on growing ice films (γtrap) and compare the results to an existing framework that describes the non-equilibrium trapping of trace gases on ice. The trapping of HCl in growing ice crystals in the atmosphere is assessed and compared to the gas and ice phase partitioning resulting from equilibrium surface adsorption and solubility.
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机译：在194之间的温度下，研究了盐酸（HCl），乙醇（C 2 H 5 OH），乙醇（C 2 H 5 OH），1-丁醇（1-C4H9OH），甲酸HC（O）OH和三氟乙酸（CF3C（O）OH）酸进行了增长的温度和228k。 HCL在冰增长期间显示出广泛，连续摄取，强烈依赖于冰生长速度，冰面温度和HCl的气相浓度。还观察到三氟乙酸被捕获在生长冰中，尽管较高的阶数小于HCl，而乙醇，1-丁醇，冰上的吸附和解吸动力学没有可测量地不同于不生长的冰冰，即使在非常高的冰增长率。我们介绍了HCL在生长冰膜（γTRAP）上的摄取系数的参数化，并将结果与现有框架进行比较，该框架描述了冰上的痕量气体的非平衡捕获。评估并将HCl在大气中生长冰晶的捕获，并与均衡表面吸附和溶解度产生的气体和冰相分配相比。
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