Studies Related to the Earth's Hot Oxygen Corona

与地球热氧电晕相关的研究

• 批准号: 9224988
• 负责人: Philip Richards
• 金额: $ 18.56万
• 依托单位: University of Alabama in Huntsville
• 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: 1993-09-15 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9224988&HistoricalAwards=false
• 关键词: Studies; Related; Earth; Hot; Oxygen

9224988 Richards The Earth's hot oxygen corona may play a significant role in a number of important phenomena in the Earth's upper atmosphere. These phenomena include (1) the maintenance of the night ionosphere, (2) the helium balance (escape flux), and (3) the supply of energetic ions to the plasmasphere. Before these effects can be studied, it will be necessary to develop a numerical model of hot oxygen which will include quenching of metastable species as important new sources. It will also be necessary to develop a similar model for hot nitrogen atoms because many reactions produce energetic nitrogen atoms which may impact the hot oxygen geocorona. The new hot oxygen model will employ the 2-stream approach because it is computationally efficient and has already been successfully applied to similar problems in the atmospheres of Earth and Venus. In addition, the PI has already used the 2-stream method extensively to study the photoelectron and auroral electron problems. The work proposed here will contribute to the advancement of knowledge by enhancing our understanding of the escape of light gases from planetary atmospheres and by a better understanding of the ionosphere and plasmasphere. This is extremely important if we are to assess the likely impact of human development on the atmosphere. The work will contribute to education by providing student access to our comprehensive model of the ionosphere and thermosphere. ***

9224988 Richards 地球的热氧日冕可能在地球高层大气的许多重要现象中发挥着重要作用。 这些现象包括（1）夜间电离层的维持，（2）氦平衡（逃逸通量），以及（3）向等离子体层提供高能离子。 在研究这些效应之前，有必要开发一个热氧数值模型，其中包括作为重要新来源的亚稳态物质的猝灭。 还需要为热氮原子开发类似的模型，因为许多反应会产生高能氮原子，这可能会影响热氧地冕。 新的热氧模型将采用2流方法，因为它计算效率高，并且已经成功应用于地球和金星大气中的类似问题。 此外，PI已经广泛使用2流方法来研究光电子和极光电子问题。 这里提出的工作将通过增强我们对轻气体从行星大气层逃逸的理解以及更好地理解电离层和等离子体层来促进知识的进步。 如果我们要评估人类发展对大气可能产生的影响，这一点极其重要。 这项工作将为学生提供了解我们的电离层和热层综合模型的机会，从而为教育做出贡献。 ***