Solar-Synchronous Tides in Mars Thermosphere CO<SUB>2</SUB>, Ar, and N<SUB>2</SUB> Densities From MAVEN - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Journal of Geophysical Research Space Physics Année : 2023

Solar-Synchronous Tides in Mars Thermosphere CO2, Ar, and N2 Densities From MAVEN

Jeffrey M. Forbes
  • Fonction : Auteur
Xiaoli Zhang
  • Fonction : Auteur
Xiaohua Fang
  • Fonction : Auteur
Mehdi Benna
  • Fonction : Auteur
Francisco González-Galindo
  • Fonction : Auteur

Résumé

Measurements of CO2, Ar and N2 densities from the Neutral Gas and Ion Mass Spectrometer on the Mars Atmosphere and Volatile Evolution Mission (MAVEN) between 150 and 200 km altitude during 2015-2022 are analyzed to reveal diurnal (DW1), semidiurnal (SW2) and terdiurnal (TW3) solar-synchronous tides in Mars thermosphere. Multi-year-mean tidal perturbations on a diurnal- and zonal-mean background, corrected for solar flux variations, are reported as a function of latitude (48°S-48°N), altitude and solar longitude (Ls). The DW1, SW2 and TW3 amplitudes at for example, 180 km altitude are of order 90%-120%, 15%-20%, and ≲10% for CO2 and Ar, and roughly 2/3 these values for N2, the latter presumably due to the difference in molecular weight from the other species. Through examination of vertical phase progressions, DW1 is concluded to be mainly excited in situ, but SW2 and TW3 contain significant contributions from tides propagating upward from lower altitudes. By analogy with studies for Earth's thermosphere, the DW1 amplitudes and phases are thought to reflect the combined influences of thermal expansion and vertical winds. Points of agreement and disagreement with DW1, SW2, and TW3 amplitudes and phases derived from the Mars Climate Database are noted and interpreted.
Fichier principal
Vignette du fichier
JGR Space Physics - 2023 - Forbes - Solar_E2_80_90Synchronous Tides in Mars Thermosphere CO2 Ar and N2 Densities From MAVEN.pdf (816.88 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

insu-04195483 , version 1 (07-12-2023)

Licence

Copyright (Tous droits réservés)

Identifiants

Citer

Jeffrey M. Forbes, Xiaoli Zhang, Xiaohua Fang, Mehdi Benna, Francisco González-Galindo, et al.. Solar-Synchronous Tides in Mars Thermosphere CO2, Ar, and N2 Densities From MAVEN. Journal of Geophysical Research Space Physics, 2023, 128, ⟨10.1029/2023JA031637⟩. ⟨insu-04195483⟩
48 Consultations
8 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More