Global 4-D Investigation of Water During the Mars Year 34 Dusty Season from a Multi-Spacecraft Assimilation

Holmes, James; Lewis, Stephen; Patel, Manish; Alday, Juan; Aoki, Shohei; Liuzzi, Giuliano; Villanueva, Geronimo; Crismani, Matteo; Fedorova, Anna; Korablev, Oleg; Olsen, Kevin; Kass, David and Vandaele, Ann Carine (2022). Global 4-D Investigation of Water During the Mars Year 34 Dusty Season from a Multi-Spacecraft Assimilation. In: 7th Mars Atmosphere Modelling and Observations Conference, 14-17 Jun 2022, Paris, France.

URL: http://www-mars.lmd.jussieu.fr/paris2022/abstracts...

Abstract

To understand the evolving martian water cycle and variations in transport of water throughout the atmosphere on several timescales (diurnal to season-al), a global perspective of the combined vertical and horizontal distribution of water is needed. The global 4-D vertical water vapour distribution is investigated through a reanalysis that unifies water, temperature and dust retrievals from several instruments on mul-tiple spacecraft throughout Mars Year (MY) 34 with a global circulation model. The global dust storm and southern summer regional dust storm events pushed water vapour higher in altitude across all latitudes, and supersaturated water vapour is found to penetrate the northern winter polar vortex. This analysis provides new insights into water loss from the atmosphere throughout time and helps to further constrain estimates of the past water inventory on Mars.

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