NASA's Perseverance rover's Mars Environmental Dynamics Analyzer (MEDA) is collecting data at Jezero crater, characterizing the physical processes in the lowest layer of the Martian atmosphere. Measurements from the instrument's first 250 sols reveal spatially and temporally variable meteorology. Observations unveil the diversity of processes driving change on today's Martian surface, including the transition between stable night-time and turbulent daytime regimes, aerosol concentration variations, wind patterns driven by topography, and a complex hydrologic cycle.

J. A. Rodriguez-Manfredi, M. de la Torre Juarez, A. Sanchez-Lavega, R. Hueso, G. Martinez, M. T. Lemmon, C. E. Newman, A. Munguira, M. Hieta, L. K. Tamppari, J. Polkko, D. Toledo, E. Sebastian, M. D. Smith, I. Jaakonaho, M. Genzer, A. De Vicente-Retortillo, D. Viudez-Moreiras, M. Ramos, A. Saiz-Lopez, A. Lepinette, M. Wolff, R. J. Sullivan, J. Gomez-Elvira, V. Apestigue, P. G. Conrad, T. Del Rio-Gaztelurrutia, N. Murdoch, I. Arruego, D. Banfield, J. Boland, A. J. Brown, J. Ceballos, M. Dominguez-Pumar, S. Espejo, A. G. Fairén, R. Ferrandiz, E. Fischer, M. Garcia-Villadangos, S. Gimenez, F. Gomez-Gomez, S. D. Guzewich, A.-M. Harri, J. J. Jimenez, V. Jimenez, T. Makinen, M. Marin, C. Martin, J. Martin-Soler, A. Molina, L. Mora-Sotomayor, S. Navarro, V. Peinado, I. Perez-Grande, J. Pla-Garcia, M. Postigo, O. Prieto-Ballesteros, S. C. R. Rafkin, M. I. Richardson, J. Romeral, C. Romero, H. Savijärvi, J. T. Schofield, J. Torres, R. Urqui, S. Zurita