A self-consistent model for terrestrial planet atmospheres

类地行星大气的自洽模型

• 批准号: 2277520
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2277520
• 关键词: self; consistent; model; terrestrial; planet

For both Solar System objects and exoplanets, their past formation and future evolution can be understood through examining their present-day chemical compositions. Current observations of rocky exoplanets are limited, though, and even near-future observations will only enable us to characterise the upper regions of their atmospheres. It is thus vital that we have comprehensive models which couple the upper atmospheres of these rocky exoplanets to their lower atmospheres, surfaces and interiors. This is also key in understanding the early evolution of Earth, Venus and Mars.Creating such a model for magma ocean worlds and habitable worlds is the main objective of my work. Encompassing atmospheric chemistry and diffusion, radiative transfer, surface chemistry, atmospheric escape and mantle evolution, the model would be novel in the field for the planet masses and temperature regimes in which it operates, and the physics it includes, some of which is insignificant or simply does not occur for other classes of planets.The code will be developed in a modular manner, with each module containing one or more of the above listed physical concepts. Some modules will be developed from scratch, while others will be adapted versions of code from collaborators at various institutions. Modules will be developed to interact with each other, making the code self-consistent, which is a crucial asset in studying planetary evolution.

对于太阳系天体和系外行星，它们过去的形成和未来的演变可以通过检查它们现在的化学成分来了解。然而，目前对岩石系外行星的观测是有限的，即使是不久的将来的观测也只能使我们能够探测到它们大气层的上部区域。因此，至关重要的是，我们有全面的模型，将这些岩石系外行星的上层大气与它们的下层大气、表面和内部耦合起来。这也是理解地球、金星和火星早期演化的关键。为岩浆海洋世界和可居住世界创建这样一个模型是我工作的主要目标。该模型包括大气化学和扩散、辐射传输、表面化学、大气逃逸和地幔演化，在其运行的行星质量和温度状况以及其中包括的物理学领域将是新颖的，其中一些物理学是微不足道的，或者根本不会发生在其他类别的行星上。每个模块包含一个或多个上面列出的物理概念。一些模块将从头开始开发，而其他模块将是来自不同机构合作者的代码的改编版本。模块将被开发为彼此交互，使代码自洽，这是研究行星演化的重要资产。