Evolution of the atmospheres of Earth and Earth-like planets

地球和类地行星大气层的演化

• 批准号: 415083-2012
• 负责人: Goldblatt, Colin
• 金额: $ 2.7万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=530882
• 关键词: Evolution; atmospheres; Earth; like; planets

The evolution of Earth's atmosphere through time depends on the interaction of many parts of the Earth System. The proposed work is to study this evolution, linking geochemical change, atmospheric composition and climate. Areas of particular emphasis will be the early Earth atmosphere (changes in bulk atmospheric composition, greenhouse gas inventories, the "faint young Sun paradox" and low-latitude glaciation) and hot "runaway greenhouse" atmospheres (impact induced during the late heavy bombardment, insolation driven in Earth's future and Venus' past). For geochemical evolution, the focus is on novel quantitative synthesis of existing data, including the development of new conceptual and numerical models. Work on climate will use a hierarchy of models: an existing line-by-line radiative transfer code for reference radiative transfer calculations, a existing radiative-convective climate model and a new 2D statistical dynamical climate model which will be developed as part of the proposed work. This work addresses fundamental questions of Earth evolution and has relevance to understanding contemporary climate change and to understanding the atmospheres of extra-solar planets.

地球大气层随时间的演变取决于地球系统许多部分的相互作用。拟议的工作是研究这种演变，将地球化学变化、大气成分和气候联系起来。特别强调的领域将是早期地球大气层（大部分大气成分的变化、温室气体清单、“暗淡的年轻太阳悖论”和低纬度冰川）和热的“失控的温室”大气层（在后期猛烈轰击期间引起的影响、地球未来和金星过去的日照）。对于地球化学演化，重点是对现有数据进行新的定量合成，包括开发新的概念和数值模型。气候方面的工作将使用一系列模型：现有的逐线辐射传输代码，用于参考辐射传输计算，现有的辐射-对流气候模型和新的二维统计动力气候模型，该模型将作为拟议工作的一部分开发。这项工作解决了地球演化的基本问题，并与理解当代气候变化和理解太阳系外行星的大气层有关。