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CO2 variations in the Martian lower thermosphere from IUVS-MAVEN airglow observations.
Gkouvelis, Leonardos; Gérard, Jean-Claude; Ritter, Birgit et al.
2018European Planetary Society Congress
Editorial reviewed
 

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Keywords :
Mars; atmospheres dynamics; Ultraviolet; MAVEN; carbon dioxide; pressure level
Abstract :
[en] IUVS-MAVEN limb observations have been performed since 2014. We have analyzed almost four years of observations focusing on the O(1S) 297.2 nm dayglow emission line. We have developed an automatic methodology to retrieve the CO2 column densities near 80 km, a region difficult to probe by other techniques. We present nearly two Martian years of observations of pressure variations at different latitudes and comparisons withMCD model predictions. Generally, the best agreement is reached following scaling down of the MCD values from 0.3 to 0.8 to fit the observations. This result was previously expected on the basis of model comparisons with ultraviolet occultation measurements.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gkouvelis, Leonardos
Gérard, Jean-Claude  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Ritter, Birgit ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Hubert, Benoît  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Jain, S.
Schneider, N.
Language :
English
Title :
CO2 variations in the Martian lower thermosphere from IUVS-MAVEN airglow observations.
Publication date :
17 September 2018
Number of pages :
2
Event name :
European Planetary Society Congress
Event organizer :
Copernicus
Event place :
Berlin, Germany
Event date :
16-21 septembre 2018
Audience :
International
Peer reviewed :
Editorial reviewed
Name of the research project :
PRODEX - PROgramme de Développement d'Expériences scientifiques
Funders :
ASE - Agence Spatiale Européenne [FR]
Available on ORBi :
since 29 September 2018

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