New technique for retrieving pressure and temperature distributions in the Martian atmosphere from the infrared limb observations

从红外临边观测中反演火星大气压力和温度分布的新技术

• 批准号: 18407975
• 负责人: Professor Dr. Adalbert Wilhelm Alois Pauldrach (†)
• 金额: --
• 依托单位: Lehrstuhl für Theoretische und Numerische Astrophysik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/18407975?language=en
• 关键词: New; technique; retrieving; pressure; temperature

We propose a study aimed at developing a new technique for retrieving pressure and temperature distributions in the Martian atmosphere from the infrared limb observations of this atmosphere by instruments on board of Mars orbiting satellites. These improved pressure and temperature distributions are needed as input for general circulation models (GCM) necessary for understanding the structure and circulation of the Martian atmosphere. The technique will be based on the algorithm of forward-fitting observed spectra, which avoids solving the ill-conditioned inverse radiative transfer problem. The new technique will allow extending the existing retrievals higher up to about 70-80 km by detailed accounting for the break-down of the local thermodynamic equilibrium in the middle and upper atmosphere. It will be applied to the re-evaluation of the MGS/TES limb 15 µm observations and to the processing of the 15 µm PFS/Mars-express limb observations available. Improved and extended pressure and temperature distributions will be applied for validating the Martian GCM under the development in the framework of the MAOAM project as well as in the assimilation system based on this model.

我们提出了一项研究，旨在开发一种新技术，通过火星轨道卫星上的仪器对火星大气进行红外临边观测来检索火星大气中的压力和温度分布。这些改进的压力和温度分布需要作为大气环流模型（GCM）的输入，以了解火星大气的结构和循环。该技术将基于前向拟合观测光谱的算法，避免了解决病态逆辐射传输问题。通过详细计算中层和高层大气局部热力学平衡的破坏，新技术将允许将现有的反演范围扩大到约70-80公里。它将应用于 MGS/TES 肢体 15 µm 观测值的重新评估以及可用的 15 µm PFS/Mars-express 肢体观测值的处理。改进和扩展的压力和温度分布将用于验证 MAOAM 项目框架下开发的火星 GCM 以及基于该模型的同化系统。