On the Fractal Structure of Rain in the Time Domain

时域雨的分形结构

• 批准号: 8802853
• 负责人: Anastasios Tsonis
• 金额: $ 4.47万
• 依托单位: University of Wisconsin-Milwaukee
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-15 至 1989-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8802853&HistoricalAwards=false
• 关键词: Fractal; Structure; Rain; Time; Domain

The explicit modeling of rain and all its applications, such as basin.scale hydrology, require complete description of the structure of the rain field in both space and time; an accurate determination of the temporal and spatial scaling parameters is therefore important. Previous research in the spatial domain suggests that the rain field exhibits an anisotropic scaling characterized by an elliptical dimension of about 2.22. Under this project, Professor Tsonis will extend the fractal analysis to the time domain. The analysis will provide necessary scaling parameters for characterizing the evolution of rain and will also serve as a direct test of Taylor's hypothesis of "frozen turbulence".

降雨的显式建模及其所有应用，例如流域尺度水文学，需要对雨场在空间和时间上的结构进行完整的描述；因此，准确确定时间和空间缩放参数非常重要。 先前在空间域的研究表明，雨场表现出各向异性尺度，其特征是椭圆尺寸约为 2.22。 在这个项目下，Tsonis教授将把分形分析扩展到时域。 该分析将为表征降雨的演变提供必要的尺度参数，并将作为对泰勒“冻结湍流”假设的直接检验。