Orthonormal Wavelet Analysis of Space-Scale Relationships in the Atmospheric Boundary Layer Over Complex Terrain

复杂地形大气边界层空间尺度关系的正交小波分析

• 批准号: 9304331
• 负责人: Marc Parlange
• 金额: $ 11.21万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-15 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304331&HistoricalAwards=false
• 关键词: Orthonormal; Wavelet; Analysis; Space; Scale

Research is proposed to improve our understanding of atmosphere- land surface relationships at local and regional scales. The project will involve analysis of the atmospheric boundary layer to study turbulent space-scale relationships. Parameterizations of the Atmospheric Boundary Layer (ABL) transport are critical for quantifying surface fluxes over heterogeneous regions since the ABL integrates regional scale fluxes. The experimental data necessary to carry out the analysis have already been collected: 1) Field (1 km length scale) experiments near UC Davis, 2) Basin (15 km length scale) experiments in Ojai Valley southern California, 3) Regional (100 km length scale) experiments in the Landes Regional in southwestern France as part of HAPEX-MOBILHY. The data collected over the different regions will be analyzed using compactly supported orthonormal wavelet expansions to study spatial intermittency of the surface heat fluxes for various wave numbers in the inertial subrange. In addition dual spectra, which enable a space-scale representation of the turbulent energy, shall be applied to sensible and latent heat fluxes for different atmospheric stability conditions. The spatial probability distribution of the heat fluxes at various scales will be also analyzed. Ultimately this project will provide basic information for the development of models of the ABL to parameterize surface fluxes in general circulation models.

建议进行研究，以提高我们对地方和区域尺度上的大气-陆面关系的理解。该项目将涉及对大气边界层的分析，以研究湍流的空间尺度关系。由于大气边界层(ABL)结合了区域尺度通量，因此大气边界层(ABL)输送的参数化对于量化非均匀区域上的地面通量至关重要。已经收集了进行分析所需的实验数据：1)加州大学戴维斯分校附近的现场(1公里长尺度)实验，2)加利福尼亚州南部奥哈伊山谷的盆地(15公里长尺度)实验，3)法国西南部朗德斯地区的区域(100公里长尺度)实验，作为HAPEX-MOBILHY的一部分。在不同区域收集的数据将使用紧支撑的正交化小波展开进行分析，以研究惯性子区内不同波数的表面热通量的空间间歇性。此外，对于不同大气稳定度条件下的感热和潜热通量，还应采用双光谱，这种光谱能够在空间尺度上表示湍流能量。还将分析不同尺度上热通量的空间概率分布。最终，该项目将为开发大气环流模式中的地面通量参数的ABL模式提供基本信息。