We analyze Mars Climate Sounder temperature and aerosol data in the tropics, and use Fourier analysis at different local times to study atmospheric tides and their relation to the dust and water ice distributions. Our results reveal that Mars year (MY) 29 has large amplitude non‐migrating thermal tides during southern hemisphere spring equinox that are not observed at the same local time in any other year. The nighttime temperatures are the most perturbed compared to other years, with strong temperature inversions at 35–55 km altitude. The nighttime water ice cloud structure is strongly influenced by the eastward‐propagating diurnal Kelvin waves 1 and 2. Increased nighttime radiative cooling from regions of thicker clouds results in stronger downwelling above the clouds, leading to increased adiabatic warming and a strengthening of the temperature inversions. The temperatures and water ice clouds at 3:45 a.m. in MY29 more closely resemble those at 5:00 a.m. in other years, suggesting there was a shift in the phase of the diurnal tide. This phase shift, and the large amplitude non‐migrating thermal tides, appear to be related to early dust activity. Two early dust storms occurred in MY29 around the time there was upwelling over the tropics, associated with the Hadley circulation. This likely enabled the dust to be transported to higher altitudes where it has a larger radiative influence. The early dust activity in MY29 also increased the strength of the westward‐propagating non‐migrating thermal tides.

中文翻译：

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根据火星气候探测仪数据，南半球春季春分期间火星热带的气溶胶和潮汐

我们分析了热带地区的火星气候探测器的温度和气溶胶数据，并在不同的本地时间使用傅立叶分析来研究大气潮汐及其与尘埃和水冰分布的关系。我们的结果表明，火星年（MY）29在南半球春季春分期间具有大幅度的非迁移热潮，而在任何其他年份的同一本地时间都没有观测到。与其他年份相比，夜间温度最受干扰，在35-55 km的高度强烈逆温。夜间水冰云的结构受到向东传播的开尔文波1和2的强烈影响。夜间来自较厚云区域的辐射冷却增加，导致云层上的下沉强烈，导致绝热变暖加剧，温度反演增强。MY29的凌晨3:45的温度和水冰云与其他年份的5:00的温度更加相似，表明昼夜潮的相位有所变化。这种相移和大幅度的非迁移热潮似乎与早期尘埃活动有关。在MY29附近发生了两次早期沙尘暴，当时热带地区上空发生了暴雨，这与哈德利环流有关。这可能使灰尘能够被运输到辐射影响更大的更高海拔高度。MY29的早期扬尘活动也增加了向西传播的非迁移热潮的强度。在其他年份，这表明昼夜潮的相位发生了变化。这种相移和大幅度的非迁移热潮似乎与早期尘埃活动有关。在MY29附近发生了两次早期沙尘暴，当时热带地区上空发生了暴雨，这与哈德利环流有关。这可能使灰尘能够被运输到辐射影响更大的更高海拔高度。MY29的早期扬尘活动也增加了向西传播的非迁移热潮的强度。在其他年份，这表明昼夜潮的相位发生了变化。这种相移和大幅度的非迁移热潮似乎与早期尘埃活动有关。在MY29附近发生了两次早期沙尘暴，当时热带地区上空发生了暴雨，这与哈德利环流有关。这可能使灰尘能够被运输到辐射影响更大的更高海拔高度。MY29的早期扬尘活动也增加了向西传播的非迁移热潮的强度。与哈德利循环有关。这可能使灰尘能够被运输到辐射影响更大的更高海拔高度。MY29的早期扬尘活动也增加了向西传播的非迁移热潮的强度。与哈德利循环有关。这可能使灰尘能够被运输到辐射影响更大的更高海拔高度。MY29的早期扬尘活动也增加了向西传播的非迁移热潮的强度。