Planetary Boundary Layer Modeling Study

行星边界层模型研究

• 批准号: 8819648
• 负责人: Robert Brown
• 金额: $ 20.82万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-06-01 至 1993-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8819648&HistoricalAwards=false
• 关键词: Planetary; Boundary; Layer; Modeling; Study

"Planetary Boundary Layer Modeling Study" One of the important aspects of modeling the atmosphere for numerical weather prediction, synoptic storms analyses, and climate studies, involves the representation of the physical processes in the planetary boundary layer (pbl), the atmospheric layer closest to the surface. Between the gross simplifications of bulk-type constant coefficients and the sophistication, but computationally high-cost, of higher order closure of the turbulence equations, there is room for improvement. The principal investigator's pbl model is a good candidate for exploring this area. It is a two-level model that depends on the atmospheric stratification, surface roughness, and baroclinicity. Winds obtained with the model can be used to estimate the surface winds and wind stresses needed to determine the fluxes of momentum, heat, and moisture into the boundary layer. Under this award, the principal investigator hopes to demonstrate that his relatively simple analytical pbl model can provide estimates of the boundary properties that are comparable to results obtained with very complex pbl models, but with considerable savings in computations. The applicability of the model results will also be tested by comparing them with actual measurements of the boundary layer under a variety of atmospheric conditions. Finally, the principal investigator will evaluate the role that large scale eddies play in the boundary layer. This research is important because a full understanding of the extremely complex processes of the atmospheric boundary layer, and their representation in numerical models, continues to elude the atmospheric sciences community.

“行星边界层模式研究” 模拟大气层的一个重要方面是 数值天气预报、天气风暴分析，以及 气候研究，涉及物理的代表性， 在行星边界层（pbl）、大气中的过程 最接近表面的一层。 在粗略的简化 体积型常系数和复杂性，但 计算成本高，高阶封闭的 湍流方程，还有改进的空间。 的 首席研究员的PBL模型是一个很好的候选者， 探索这个领域。 这是一个两级模型，取决于 大气层结、地表粗糙度和斜压性。 用该模式获得的风可以用来估计 确定大气通量所需的地面风和风应力 动量、热量和水分进入边界层。 根据本 获奖，首席研究员希望证明他的 相对简单的分析PBL模型可以提供 边界特性与获得的结果相当 具有非常复杂的PBL模型，但在 计算。 模型结果的适用性也将 通过将它们与实际测量值进行比较来进行测试， 各种大气条件下的边界层。 最后，主要研究者将评估 边界层中有大尺度的涡流。 这项研究很重要，因为充分了解 大气边界层极其复杂的过程， 以及它们在数值模型中的代表性， 大气科学界。