| Literature DB >> 31919130 |
Anna A Fedorova1, Franck Montmessin2, Oleg Korablev3, Mikhail Luginin3, Alexander Trokhimovskiy3, Denis A Belyaev3, Nikolay I Ignatiev3, Franck Lefèvre2, Juan Alday4, Patrick G J Irwin4, Kevin S Olsen2,4, Jean-Loup Bertaux3,2, Ehouarn Millour5, Anni Määttänen2, Alexey Shakun3, Alexey V Grigoriev3,6, Andrey Patrakeev3, Svyatoslav Korsa3, Nikita Kokonkov3, Lucio Baggio2, Francois Forget5, Colin F Wilson4.
Abstract
The loss of water from Mars to space is thought to result from the transport of water to the upper atmosphere, where it is dissociated to hydrogen and escapes the planet. Recent observations have suggested large, rapid seasonal intrusions of water into the upper atmosphere, boosting the hydrogen abundance. We use the Atmospheric Chemistry Suite on the ExoMars Trace Gas Orbiter to characterize the water distribution by altitude. Water profiles during the 2018-2019 southern spring and summer stormy seasons show that high-altitude water is preferentially supplied close to perihelion, and supersaturation occurs even when clouds are present. This implies that the potential for water to escape from Mars is higher than previously thought.Entities:
Year: 2020 PMID： 31919130 DOI： 10.1126/science.aay9522
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728