TY - JOUR
T1 - Effects of the June 2018 Global Dust Storm on the Atmospheric Composition of the Martian Upper Atmosphere as Observed by MAVEN
AU - Farahat, Ashraf
AU - Mayyasi, Majd
AU - Withers, Paul
AU - Dayeh, Maher A.
AU - Abuelgasim, Abdelgadir
N1 - Funding Information:
Authors would like to acknowledge the support provided by the Deanship of Scientific Research (DSR) at the King Fahd University of Petroleum and Minerals (KFUPM) for funding his work through Project No. SB181007. Portion of this work was performed at the Center for Space Physics, Boston University. The authors thank the reviewers for their helpful comments. M. Mayyasi was funded, in part by the NASA grant 80NSSC18K0266. P. Withers acknowledges support from the MAVEN project. M. Dayeh acknowledges partial support from NASA grant 80NSSC19K0079.
Funding Information:
Authors would like to acknowledge the support provided by the Deanship of Scientific Research (DSR) at the King Fahd University of Petroleum and Minerals (KFUPM) for funding his work through Project No. SB181007. Portion of this work was performed at the Center for Space Physics, Boston University. The authors thank the reviewers for their helpful comments. M. Mayyasi was funded, in part by the NASA grant 80NSSC18K0266. P. Withers acknowledges support from the MAVEN project. M. Dayeh acknowledges partial support from NASA grant 80NSSC19K0079.
Publisher Copyright:
© 2021. American Geophysical Union. All Rights Reserved.
PY - 2021/10
Y1 - 2021/10
N2 - The densities of six neutral species in the Martian upper atmosphere were analyzed before and during the 2018 Martian global dust storm (GDS 2018) using data from the Neutral Gas and Ion Mass Spectrometer of the Mars Atmosphere and Volatile EvolutioN mission. The trends of the dayside densities of the neutral species and their relative abundances were investigated between May 27 and June 17, 2018, at altitudes of 160–210 km. GDS 2018 caused variations in the neutral species abundance of the upper atmosphere at its onset in June 5–8, 2018, with the CO2, Ar, CO, O, N2, and He densities decreasing relative to prestorm conditions. The densities of the examined neutral species increased during the storm, except those of O and He. During the storm, the relative abundances of CO2 and Ar increased, while those of CO and O decreased and those of N2 and He remained the same. The variation in the neutral species with altitude was consistent with the regular atmospheric conditions and unrelated to the GDS 2018 drivers. The higher thermospheric temperature observed during the storm onset suggested that changes in the composition of the neutral species were caused by storm-induced thermal enhancements.
AB - The densities of six neutral species in the Martian upper atmosphere were analyzed before and during the 2018 Martian global dust storm (GDS 2018) using data from the Neutral Gas and Ion Mass Spectrometer of the Mars Atmosphere and Volatile EvolutioN mission. The trends of the dayside densities of the neutral species and their relative abundances were investigated between May 27 and June 17, 2018, at altitudes of 160–210 km. GDS 2018 caused variations in the neutral species abundance of the upper atmosphere at its onset in June 5–8, 2018, with the CO2, Ar, CO, O, N2, and He densities decreasing relative to prestorm conditions. The densities of the examined neutral species increased during the storm, except those of O and He. During the storm, the relative abundances of CO2 and Ar increased, while those of CO and O decreased and those of N2 and He remained the same. The variation in the neutral species with altitude was consistent with the regular atmospheric conditions and unrelated to the GDS 2018 drivers. The higher thermospheric temperature observed during the storm onset suggested that changes in the composition of the neutral species were caused by storm-induced thermal enhancements.
KW - dust
KW - evolution of the atmosphere
KW - neutral species
KW - planetary atmosphere
KW - upper atmosphere
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U2 - 10.1029/2021JE006868
DO - 10.1029/2021JE006868
M3 - Article
AN - SCOPUS:85117938246
SN - 2169-9097
VL - 126
JO - Journal of Geophysical Research E: Planets
JF - Journal of Geophysical Research E: Planets
IS - 10
M1 - e2021JE006868
ER -