Temperature estimation from hydroxyl airglow emission in the Venus night side mesosphere

[en] The temperature of the night side of Venus at about 95 km has been determined by using spectral features of the hydroxyl airglow emission around 3 μm, recorded from July 2006 to July 2008 by VIRTIS onboard Venus Express. The retrieved temperatures vary from 145.5 to about 198.1 K with an average value of 176.3 ± 14.3 K and are in good agreement with previous ground-based and space observations. The variability with respect to latitude and local time has been studied, showing a minimum of temperature at equatorial latitudes, while temperature values increase toward mid latitudes with a local maximum at about 35°N. The present work provides an independent contribution to the temperature estimation in the transition region between the Venus upper mesosphere and the lower thermosphere, by using the OH emission as a thermometer, following the technique previously applied to the high-resolution O[SUB]2[/SUB](a[SUP]1[/SUP]Δ[SUB]g[/SUB]) airglow emissions observed from ground.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Migliorini, Alessandra

Snels, M.

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

Soret, Lauriane ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Piccioni, G.

Drossart, P.

Language :

English

Title :

Temperature estimation from hydroxyl airglow emission in the Venus night side mesosphere

Publication date :

January 2018

Journal title :

Icarus

ISSN :

0019-1035

eISSN :

1090-2643

Publisher :

Elsevier, San Diego, United States - California

Volume :

300

Pages :

386-391

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2018Icar..300..386M

Funders :

BELSPO - Service Public Fédéral de Programmation Politique scientifique

Available on ORBi :

since 30 December 2017

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