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Dust Devil Frequency of Occurrence and Radiative Effects at Jezero Crater, Mars, as Measured by MEDA Radiation and Dust Sensor (RDS)

Toledo, D. and Apéstigue, V. and Arruego, I. and Lemmon, M. and Gómez, L. and Montoro, F. and Hueso, R. and Newman, C. and Smith, M. and Viudez‐Moreiras, D. and Martínez, G. and Lorenz, R. and Vicente‐Retortillo, A. and Sanchez‐Lavega, A. and Juarez, M. de la Torre and Rodriguez‐Manfredi, J. A. and Carrasco, I. and Yela, M. and Jimenez, J. J. and García‐Menendez, E. and Navarro, S. and Gomez‐Elvira, F. J. and Harri, A.‐M. and Polkko, J. and Hieta, M. and Genzer, M. and Murdoch, Naomi and Sebastian, E. Dust Devil Frequency of Occurrence and Radiative Effects at Jezero Crater, Mars, as Measured by MEDA Radiation and Dust Sensor (RDS). (2023) Journal of Geophysical Research: Planets, 128 (1). ISSN 2169-9097

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Official URL: https://doi.org/10.1029/2022JE007494


The Mars Environmental Dynamics Analyzer, onboard the Perseverance rover, is a meteorological station that is operating on Mars and includes, among other sensors, the radiometer Radiation and Dust Sensor (RDS). From RDS irradiance observations, a total of 374 dust devils (DDs) were detected for the first 365 sols of the mission (Ls = 6°–182°), which along with wind and pressure measurements, we estimated a DD frequency of formation at Jezero between 1.3 and 3.4 DD km −2 sol −1 (increasing as we move from spring into summer). This frequency is found to be smaller than that estimated at the Spirit or Pathfinder landing sites but much greater than that derived at InSight landing site. The maximum in DD frequency occurs between 12:00 and 13:00 local true solar time, which is when the convective heat flux and lower planetary boundary layer IR heating are both predicted to peak in Jezero crater. DD diameter, minimum height, and trajectory were studied showing (a) an average diameter of 29 m (or a median of 25 m) and a maximum and minimum diameter of 132 ± 63.4 and 5.6 ± 5.5 m; (b) an average minimum DD height of 231 m and a maximum minimum-height of 872 m; and (c) the DD migration direction is in agreement with wind measurements. For all the cases, DDs decreased the UV irradiance, while at visible or near-IR wavelengths both increases and decreases were observed. Contrary to the frequency of formation, these results indicate similar DD characteristics in average for the studied period.

Item Type:Article
HAL Id:hal-03978206
Audience (journal):International peer-reviewed journal
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Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
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Deposited On:08 Feb 2023 09:01

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