Isobar Altitude Variations in the Upper Mesosphere Observed With IUVS‐MAVEN in Response to Martian Dust Storms

Gkouvelis, Leonardos; Gérard, Jean-Claude; Gonzalez-Galindo, Francisco; Hubert, Benoît; Schneider, Nicholas

doi:10.1029/2020GL087468

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Isobar Altitude Variations in the Upper Mesosphere Observed With IUVS‐MAVEN in Response to Martian Dust Storms

Gkouvelis, Leonardos; Gérard, Jean-Claude; Gonzalez-Galindo, Francisco et al.

2020 • In Geophysical Research Letters, 46

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https://hdl.handle.net/2268/248912

DOI
10.1029/2020GL087468

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Keywords :

Mars; atmosphere; dust storm; airgow; remote sensing; isobar; LMD; MAVEN

Abstract :

[en] We report limb measurements of the oxygen dayglow emission at 297.2 nm performed during four Martian dust storms. The emission peak provides a good remote sensing tool to probe changes of the altitude of the 39 mPa pressure level for the first time during dust storms. We illustrate the time variation of these changes and compare them with the infrared opacity in the lower atmosphere. We find that the 39 mPa level rises in response to the increase in dust opacity. It reaches a plateau, and additional dust load does not significantly increase its altitude. Numerical simulations with the LMD global circulation model shows a similar response, except for the event observed during MY33 regional storm when the model fails to reproduce the observed variations. Observations collected during the onset of the global dust storm in June 2018 show that the upper atmosphere rapidly responds within two Martian days to the increased amount of tropospheric dust.

Research Center/Unit :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Gkouvelis, Leonardos ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)

Gonzalez-Galindo, Francisco; Universidad de Granada (España) = University of Granada (Spain) - UGR

Hubert, Benoît ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Schneider, Nicholas; University of Colorado > LASP

Language :

English

Title :

Isobar Altitude Variations in the Upper Mesosphere Observed With IUVS‐MAVEN in Response to Martian Dust Storms

Publication date :

June 2020

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

Wiley, Washington, United States - District of Columbia

Volume :

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
F.R.S.-FNRS - Fonds de la Recherche Scientifique

Available on ORBi :

since 26 June 2020

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