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arXiv 2408.15745astro-ph.EPphysics.ao-ph
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InSight 着陆器压力传感器在火星大气中观测到的热潮高次谐波

High-Order harmonics of Thermal Tides observed in the atmosphere of Mars by the Pressure Sensor on the Insight lander

J. Hernandez-Bernal, A. Spiga, F. Forget, D. Banfield

AI总结:

基于 InSight 着陆器高精度压力数据,研究火星热潮并发现超过 24 次的谐波,揭示了奇偶谐波的季节性演化差异及沙尘事件响应,指出高次谐波干涉可产生气象学模式。

摘要:

热潮是周期为太阳日谐波的行星尺度大气波动。在火星大气中,热潮相比任何其他已知行星都尤为显著。基于 InSight 着陆器产生的压力时间序列数据集(该数据集在精度和时间覆盖范围上均前所未有),我们研究了火星上的热潮,并发现了甚至超过 24 次的谐波,这显著超过了以往其他文献报道的谐波数量。我们对比探讨了潮汐谐波的特征与季节性演化,发现偶次和奇次谐波表现出一些明显不同的趋势,这些趋势随季节演化并对沙尘事件作出响应。具有小振幅的高次潮汐谐波可能会发生瞬态相长干涉,从而产生具有气象学意义的模式。

英文摘要:

Thermal tides are atmospheric planetary-scale waves with periods that are harmonics of the solar day. In the Martian atmosphere thermal tides are known to be especially significant compared to any other known planet. Based on the data set of pressure timeseries produced by the InSight lander, which is unprecedented in terms of accuracy and temporal coverage, we investigate thermal tides on Mars and we find harmonics even beyond the number 24, which exceeds significantly the number of harmonics previously reported by other works. We explore comparatively the characteristics and seasonal evolution of tidal harmonics and find that even and odd harmonics exhibit some clearly differentiated trends that evolve seasonally and respond to dust events. High-order tidal harmonics with small amplitudes could transiently interfere constructively to produce meteorologically relevant patterns.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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