Strong Localized Pumping of Water Vapor to High Altitudes on Mars During the Perihelion Season

DOI: 
10.1029/2023GL107224
Publication date: 
12/07/2024
Main author: 
Brines, A.
IAA authors: 
Brines, A.;López-Valverde, M. A.;Funke, B.;González-Galindo, F.;Lopez-Moreno, J. J.;Rodriguez-Gomez, J.
Authors: 
Brines, A.;López-Valverde, M. A.;Funke, B.;González-Galindo, F.;Aoki, S.;Villanueva, G. L.;Holmes, J. A.;Belyaev, D. A.;Liuzzi, G.;Thomas, I. R.;Erwin, J. T.;Grabowski, U.;Forget, F.;Lopez-Moreno, J. J.;Rodriguez-Gomez, J.;Daerden, F.;Trompet, L.;Ristic, B.;Patel, M. R.;Bellucci, G.;Vandaele, A. C.
Journal: 
Geophysical Research Letters
Publication type: 
Article
Volume: 
51
Pages: 
e2023GL107224
Abstract: 
Here we present water vapor vertical profiles observed with the ExoMars Trace Gas Orbiter/Nadir and Occultation for MArs Discovery instrument during the perihelion and Southern summer solstice season (L<SUB>S</SUB> = 240°-300°) in three consecutive Martian Years 34, 35, and 36. We show the detailed latitudinal distribution of H<SUB>2</SUB>O at tangent altitudes from 10 to 120 km, revealing a vertical plume at 60°S-50°S injecting H<SUB>2</SUB>O upward, reaching abundance of about 50 ppmv at 100 km. We have observed this event repeatedly in the three Martian years analyzed, appearing at L<SUB>S</SUB> = 260°-280° and showing inter-annual variations in the magnitude and timing due to long term effects of the Martian Year 34 Global Dust Storm. We provide a rough estimate of projected hydrogen escape of 3.2 × 10<SUP>9</SUP> cm<SUP>−2 </SUP>s<SUP>−1</SUP> associated to these plumes, adding further evidence of the key role played by the perihelion season in the long term evolution of the planet's climate.
Database: 
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2024GeoRL..5107224B/abstract
ADS Bibcode: 
2024GeoRL..5107224B
Keywords: 
Mars;atmosphere;water vapor;ExoMars/TGO;NOMAD;solar occultation