Coupling processes int he middle/upper atmospheres of the terrestrial planets

类地行星中/高层大气的耦合过程

• 批准号: 227519-2006
• 负责人: Ward, William
• 金额: $ 2.32万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=363693
• 关键词: Coupling; processes; int; he; middle

One of the significant questions about our atmosphere which remains only partially solved is why it maintains a similar structure year to year in spite of variations in the temperature, winds, constituent distributions and the form of the large scale waves. To date, much effort has been exerted in successfully defining the characteristics of these cycles. While it is important for these cycles to be understood, it is equally important to understand the underlying mechanisms which maintain this quasi-equilibrium. With this knowledge we can predict how these atmospheres might evolve should conditions change (for example due to solar variability, natural disasters or anthropogenic influences). Such an effort is not trivial. The atmosphere is a non-linear system with non-local radiative connections between various heights. The coupling between the large scale wind and temperature fields, contituent distributions and waves of all scales must be indentified and quantified to address this problem. The objective of this proposal is to explore these coupling mechanisms in the middle and upper atmospheres of the terrestrial planets - in particular the Earth and Mars. The program involves the development and refinement of an observation technique developed in Canada called Doppler Imaging for measuring dynamical signatures (wind, temperature and constituent variations), the analysis of space and ground based observations, the development of models to explain particular processes and the analysis of general circulation model results. This effort emphasizes measurements and the analysis of observations. The observation technique has potential as a satellite instrument for observing the dynamics in the atmospheres of the Earth, Mars or Venus. The modelling effort will aid in the interpretation of the observations and the validation of the physical processes involved in the observed dynamical features.

关于我们的大气的一个重要问题仍然只有部分得到解决，那就是为什么尽管温度、风、成分分布和大尺度波的形式不同，但它每年都保持着类似的结构。迄今为止，在成功地确定这些周期的特征方面已经作出了很大努力。虽然理解这些周期很重要，但理解维持这种准平衡的潜在机制也同样重要。有了这些知识，我们可以预测如果条件发生变化(例如，由于太阳变异性、自然灾害或人为影响)，这些大气可能会如何演变。这样的努力不是微不足道的。大气是一个在不同高度之间具有非局部辐射连接的非线性系统。要解决这一问题，必须识别和量化大尺度风场和温度场之间的耦合、各尺度上的分量分布和波浪。这项提议的目标是探索类地行星--特别是地球和火星--中上层大气中的这些耦合机制。该方案涉及开发和改进加拿大开发的一种名为多普勒成像的观测技术，用于测量动态特征(风、温度和成分变化)，分析空间和地面观测，开发解释特定过程的模型，以及分析一般环流模型的结果。这项工作强调测量和对观察结果的分析。这种观测技术有可能成为观测地球、火星或金星大气动态的卫星仪器。建模工作将有助于解释观测结果，并确认观测到的动力特征所涉及的物理过程。