A Non-Hydrostatic Semi-Implicit Semi-Lagrangian Global Circulation Model

非静水半隐式半拉格朗日全球环流模型

• 批准号: 9119315
• 负责人: Fredrick Semazzi
• 金额: $ 22.78万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-01 至 1996-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9119315&HistoricalAwards=false
• 关键词: Non; Hydrostatic; Semi; Implicit; Lagrangian

Anticipated increases in computing power and in the resolution of data collected through the global observational networks will allow the use of higher resolution and more precise representation of physical processes in models of the global general circulation. With the greater resolution, it may no longer be necessary or reasonable to employ the hydrostatic approximation; indeed, for many purposes, explicit representation of small scale vertical accelerations of the flow will be required. Experience with limited-area nonhydrostatic models indicates that the added computational load goes well beyond the increase in the number of model grid points. Drs. Semazzi and Scroggs will incorporate a suite of recently developed numerical techniques, which provide greater computational efficiency and accuracy, into a proof-of-concept global model. They will assess the feasibility of using high-resolution nonhydrostatic computation in global forecast models. They also hope to learn more about the role of nonhydrostatic processes in the global atmospheric circulation. Operational numerical prediction systems of the early 20th century as well as various research models are likely to be quite similar to those developed under this project. The development of efficient, accurate computational methods is critical. This results of this project will make it possible to exploit advances in computing and observing technology and in model development in the future.

计算能力和分辨率的预期提高 通过全球观测网络收集的数据将 允许使用更高的分辨率和更精确的表示 全球大气环流模型中的物理过程。 有了更高的分辨率，它可能不再是必要的， 合理采用流体静力学近似;事实上，对于 多用途，明确表示小尺度垂直 将需要流动的加速。 经验 有限区域非静力模式表明， 计算负荷远远超过了数量的增加， 模型网格点。 塞马齐博士和斯克罗格博士最近将 开发的数值技术，提供了更大的计算 效率和准确性，转化为概念验证的全球模型。 他们将评估使用高分辨率 全球预报模式中的非静力计算。 他们还 希望更多地了解非流体静力过程在 全球大气环流。 20世纪初的业务数值预报系统 世纪以及各种研究模式可能相当 与本项目开发的类似。 的发展 有效、准确的计算方法是至关重要的。 这 该项目的成果将使利用先进技术成为可能。 在计算和观测技术以及模型开发方面， 未来