The paper presents observations of gravity wave-induced temperature disturbances in the Martian atmosphere obtained with the mid-infrared (MIR) spectrometer, a channel of the Atmospheric Chemistry Suite instrument on board the Trace Gas Orbiter (ACS/TGO). Solar occultation measurements of a absorption band at 2.7 m were used for retrieving density and temperature profiles between heights of 20 and 160 km with vertical resolution sufficient for deriving small-scale structures associated with gravity waves. Several techniques for distinguishing disturbances from the background temperature have been explored and compared. Instantaneous temperature profiles, amplitudes of wave packets and potential energy have been determined. Horizontal momentum fluxes and associated wave drag have been estimated. The analyzed data set of 144 profiles encompasses the measurements made over the second half of Martian Year 34, from the Solar longitude through . We observe enhanced gravity wave dissipation/breaking in the mesopause region of 100–130 km. Our analysis shows no direct correlation between the wave amplitude and Brunt-Väisälä frequency. It may indicate that convective instability may not be the main mechanism limiting gravity wave growth in the middle atmosphere of Mars.

中文翻译：

---

来自 ACS/TGO 掩星测量的火星大气中海拔 20-160 公里处的重力波活动

该论文介绍了使用中红外 (MIR) 光谱仪获得的火星大气中重力波引起的温度扰动的观测结果，该光谱仪是痕量气体轨道器 (ACS/TGO) 上的大气化学套件仪器的一个通道。2.7 吸收带的太阳掩星测量m 用于检索 20 至 160 公里高度之间的密度和温度剖面，其垂直分辨率足以推导出与重力波相关的小尺度结构。已经探索和比较了几种区分干扰与背景温度的技术。瞬时温度分布、波包的振幅和势能已经被确定。已经估计了水平动量通量和相关的波浪阻力。分析的 144 个剖面的数据集包括在火星第 34 年下半年进行的测量，从太阳经度到. 我们在 100-130 公里的中层顶区域观察到增强的重力波消散/破碎。我们的分析显示波幅与 Brunt-Väisälä 频率之间没有直接相关性。这可能表明对流不稳定可能不是限制火星中部大气中重力波增长的主要机制。