An Investgation of the Air Bubble and Crystallographic Characteristics of Frozen, Soaked Rime

冻结、浸泡的雾凇的气泡和晶体学特征的研究

• 批准号: 8720519
• 负责人: Douglas Lilly
• 金额: $ 11.88万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-01 至 1991-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720519&HistoricalAwards=false
• 关键词: Investgation; Air; Bubble; Crystallographic; Characteristics

Because of the destructive potential of hailstones, the likelihood of hail formation is an important component of forecasting severe weather. While meteorologists have a good knowledge of the growth characteristics of hailstones, the factors determining whether a particular thunderstorm will produce hail or not are not well understood. Hailstones are roundish in shape, with lobes or proturberances on the surface. The cross section exhibit an onion-type layered structure with alternating opaque and clear layers caused by the presence of more or less numerous air bubbles. The air bubble and crystallographic characteristics reflect the environmental conditions under which the hailstones are formed. Some relationships between hailstone structures and growth environments have been found, with additional clues to be uncovered. Under this grant, Dr. Pflaum will examine the air bubble and crystallographic properties of frozen, soaked rime grown in the laboratory with varied temperature and pressure. A detailed knowledge of the relationship will lead to a better interpretation of growth environments when decoding hailstone structures. The experiments will be conducted at the cloud physics laboratory at the University of Toronto.

由于冰雹的潜在破坏性， 冰雹形成的可能性是冰雹的一个重要组成部分， 预报恶劣天气。 虽然气象学家有一个很好的 冰雹的生长特性的知识， 决定一场雷暴是否会 产生冰雹与否还不清楚。 冰雹是圆形的，有裂片或 表面上的突起。 横截面展示了 具有交替的不透明和透明的洋葱型层状结构 由于或多或少的空气的存在而造成的层 泡沫 气泡与晶体学特征 反映了冰雹形成的环境条件 形成。 冰雹结构之间的某些关系 和生长环境的发现， 被发现 在这项资助下， 和结晶学性质的冻结，浸泡雾凇生长在 实验室的温度和压力都是变化的。 一 对关系的详细了解将导致更好的 冰雹解码时的生长环境解释 结构. 实验将在云上进行 多伦多大学的物理实验室。