Climate Change Data Portal
| CEDAR Postdoc: Numerical Modeling of Mesospheric Bores, Nonlinear Ducted Waves, and Interpretation of Observations in the Middle Atmosphere | |
| 项目编号 | 0924802 |
| Brian Laughman | |
| 项目主持机构 | NorthWest Research Associates, Incorporated |
| 开始日期 | 2009-09-01 |
| 结束日期 | 2012-08-31 |
| 英文摘要 | This research project seeks better ways to simulate atmospheric aerosols, or tiny particles suspended in air. Aerosols are important for at least three reasons: 1) they include harmful particulate pollution, 2) they include condensation nuclei which are essential for the formation of clouds and precipitation, and 3) they affect Earth's temperature, both directly by reflecting sunlight back to space and indirectly by affecting the reflectivity of clouds. Aerosols are difficult to simulate in weather and climate models because of their large numbers, small size, and the complex ways in which they form, interact with each other, and dissipate. Due to limitations in computing power, aerosols are often represented in very simple ways, and many atmospheric models track aerosol concentration only as a function of the effective radius of the particles. But in reality aerosols of a given size behave quite differently depending on their chemical makeup (e.g. sulfate, nitrate, ammonium, sea salt, black carbon, mineral dust, etc.), so that it would take perhaps 20 separate parameters to properly describe each particle. The coarse-graining technique to be developed in this project provides a framework for developing approximate aerosol simulation techniques, in which aerosol concentrations are simulated by tracking the evolution of a finite number of randomly generated "superparticles". Each superparticle represents a distribution of particles in the 20-dimensional parameter space, and the aerosol simulation is accomplished by tracking the evolution of the superparticles. The project will have several benefits beyond its contribution to aerosol simulation. For the broader scientific community, improvements in aerosol simulation will lead to better simulations of climate change, since much of the uncertainty in climate simulations comes from uncertainty in aerosols and their interactions with clouds. Better aerosol simulation also means an improved ability to simulate particulate air pollution, which will lead to improvements in air quality assessment and forecasting. In addition, the project will support education through the development of an undergraduate course in which calculus concepts are taught through their application to atmospheric thermodynamics. |
| 学科分类 | 08 - 地球科学;0805 - 大气科学 |
| 资助机构 | US-NSF |
| 项目经费 | 173283 |
| 项目类型 | Standard Grant |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/76230 |
| 推荐引用方式 GB/T 7714 | Brian Laughman.CEDAR Postdoc: Numerical Modeling of Mesospheric Bores, Nonlinear Ducted Waves, and Interpretation of Observations in the Middle Atmosphere.2009. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Brian Laughman]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Brian Laughman]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Brian Laughman]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
