Acoustics Reveals Short‐Term Air Temperature Fluctuations Near Mars' Surface

Baptiste Chide; Tanguy Bertrand; Ralph D. LorenzAsier MunguiraRicardo HuesoAgustin Sánchez‐LavegaGerman MartinezAymeric SpigaXavier JacobManuel Torre JuarezMark T. LemmonDon BanfieldClaire E. NewmanNaomi MurdochAlexander StottDaniel Viúdez‐MoreirasJorge Pla‐GarciaCarène LarmatNina L. LanzaJosé Antonio Rodríguez‐ManfrediRoger C. Wiens

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Acoustics Reveals Short‐Term Air Temperature Fluctuations Near Mars' Surface

机译：Acoustics Reveals Short‐Term Air Temperature Fluctuations Near Mars' Surface

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Abstract Acoustics is new on Mars: it allows the characterization of turbulence at smaller scales than previously possible within the lowest part of the Planetary Boundary Layer. Sound speed measurements, by the SuperCam instrument and its microphone onboard the NASA Perseverance rover, allow the retrieval of atmospheric temperatures at 0.77 m above the ground, at 3 Hz, with a ∼10 ms response time that is 20–100 times shorter than for typical thermocouple sensors used on Mars. Here we report on the first measurements of the sound speed‐derived temperature and its fluctuations near the surface. Data highlight large and rapid fluctuations up to ±7 K/s, whose amplitude over such a timescale has never been reported, nor predicted by atmospheric models. These fluctuations follow the daytime pattern of the turbulence and highlight occasional high amplitude events that are likely due to the conjunction of low thermal inertia and strong winds.

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《Geophysical Research Letters》 |2022年第21期|n/a-n/a|共10页
作者
Baptiste Chide; Tanguy Bertrand; Ralph D. LorenzAsier MunguiraRicardo HuesoAgustin Sánchez‐LavegaGerman MartinezAymeric SpigaXavier JacobManuel Torre JuarezMark T. LemmonDon BanfieldClaire E. NewmanNaomi MurdochAlexander StottDaniel Viúdez‐MoreirasJorge Pla‐GarciaCarène LarmatNina L. LanzaJosé Antonio Rodríguez‐ManfrediRoger C. Wiens;
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作者单位

Aeolis Research;

Institut Supérieur de l'Aéronautique et de l'Espace (ISAE‐SUPAERO);

Centro de Astrobiología (INTA‐CSIC)Purdue UniversityLos Alamos National LaboratoryUniversité PSLJohns Hopkins Applied Physics LaboratoryFísica AplicadaLunar and Planetary InstituteInstitut Pierre‐Simon Laplace (IPSL)Institut de Mécanique des Fluides de ToulouseCalifornia Institute of TechnologySpace Science InstituteNASA Ames Research Center;

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正文语种英语
中图分类地球物理学;
关键词
Mars atmosphere; temperature fluctuations; acoustics; turbulence;

Acoustics Reveals Short‐Term Air Temperature Fluctuations Near Mars' Surface

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