这篇博客详细介绍了实验室对极地地区形成的冰霜花进行的研究，着重于其独特的物理化学性质，如高比表面积和海水盐分含量。研究发现冰霜花可能通过释放活性卤素化合物影响大气层，导致臭氧层消耗事件。此外，它们还被指为南极海岸带海盐气溶胶的重要来源。文章概述了实验设备的建立和水结冰过程中不同盐浓度对冰霜花的影响分析。
摘要：
Recently, frost flowers attracted a lot of scientific interest due to their specific properties. They constitute highly delicate structures, which grow on newly formed sea ice in both polar regions under certain meteorological conditions like a stable atmospheric boundary layer and low air temperatures. Frost flowers exhibit high specific surface areas and also contain high concentrations of sea salt components like chloride and bromide. Therefore, it has been suggested that they contribute to the release of reactive halogen compounds to the atmosphere, which in turn can cause the well-known tropospheric ozone depletion events. During such events surface ozone concentrations drop from regular values of 30 to 40 ppbV to values below 1 ppbV. Remote sensing data indicate a significant spatial correlation between the occurrence of frost flowers and high levels of tropospheric BrO concentrations, which is a reactive intermediate during the chemical destruction of ozone in the presence of reactive bromine. Furthermore, frost flowers are potentially important sources of sea salt aerosol in the coastal regions of Antarctica. Due to fractionation processes during the formation, frost flowers contain only depleted amounts of certain compounds compared to the major sea salt components. These specific chemical signatures have been used to identify aerosols generated from frost flowers. In contrast to the mounting evidence of the impact of frost flowers on tropospheric chemistry and aerosols in the polar regions, direct observations of the processes involving frost flowers are currently non-existent. Here, we report results of laboratory experiments with frost flowers. We established a laboratory set-up for the investigation of the growth of frost flowers. In addition, we analyzed physical and chemical properties of the laboratory-grown frost flowers as a function of the sea salt concentration of the water used for the formation of the new sea ice.
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