Near Surface Atmospheric Temperatures at Jezero From Mars 2020 MEDA Measurements

The Mars Environmental Dynamics Analyzer instrument on 2020 has five Atmospheric Temperature Sensors at two altitudes (0.84 and 1.45 m) plus a Thermal InfraRed Sensor that measures temperatures the surface ∼40 m. We analyze measurements from these sensors to describe evolution of in Jezero up mission sol 400 (solar longitude LS = 13°–203°). diurnal thermal cycle is characterized by daytime convective period nocturnal stable atmosphere with variable inversion. find linear relationship between temperature fluctuations vertical gradient peak noon typical values 2.5 K In late afternoon (∼17:00 Local True Solar Time), becomes vertically isothermal vanishing fluctuations. observe very small seasonal changes air during analyzed. This related solar irradiation dust opacity. However, we significant are variety inertias terrains explored along traverse Perseverance. These strongly influence gradient, breaking nighttime inversion over high inertia. explore possible detections atmospheric tides near-surface examine variations timescales few sols could be indicative waves affecting temperatures. also discuss regional storm 153°–156° simultaneously warmed near while cooling surface.