Article (Scientific journals)
Meridional Variations of C$_2$H$_2$ in Jupiter's Stratosphere From Juno UVS Observations
Giles, Rohini S.; Greathouse, Thomas K.; Hue, Vincent et al.
2021In Journal of Geophysical Research. Planets, 126 (8), p. 06928
Peer reviewed
 

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Keywords :
Jupiter; Juno; stratosphere
Abstract :
[en] The Ultraviolet Spectrograph (UVS) instrument on the Juno mission records far-ultraviolet reflected sunlight from Jupiter. These spectra are sensitive to the abundances of chemical species in the upper atmosphere and to the distribution of the stratospheric haze layer. We combine observations from the first 30 perijoves of the mission in order to study the meridional distribution of acetylene (C2H2) in Jupiter's stratosphere. We find that the abundance of C2H2 decreases toward the poles by a factor of 2-4, in agreement with previous analyses of mid-infrared spectra. This result is expected from insolation rates: near the equator, the UV solar flux is higher, allowing more C2H2 to be generated from the UV photolysis of CH4. The decrease in abundance toward the poles suggests that horizontal mixing rates are not rapid enough to homogenize the latitudinal distribution.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Giles, Rohini S.
Greathouse, Thomas K.
Hue, Vincent
Gladstone, G. Randall
Melin, Henrik
Fletcher, Leigh N.
Irwin, Patrick G. J.
Kammer, Joshua A.
Versteeg, Maarten H.
Bonfond, Bertrand  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Grodent, Denis  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Bolton, Scott J.
Levin, Steven M.
More authors (3 more) Less
Language :
English
Title :
Meridional Variations of C$_2$H$_2$ in Jupiter's Stratosphere From Juno UVS Observations
Publication date :
2021
Journal title :
Journal of Geophysical Research. Planets
ISSN :
2169-9097
eISSN :
2169-9100
Publisher :
Wiley, Hoboken, United States - New Jersey
Volume :
126
Issue :
8
Pages :
e06928
Peer reviewed :
Peer reviewed
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Politique Scientifique Fédérale (Belgique) - BELSPO
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