An intense stratospheric jet on Jupiter
Michael Flasar
(1)
,
Virgil G. Kunde
(2)
,
Richard K. Achterberg
(3)
,
Barney J. Conrath
(4)
,
Amy A. Simon-Miller
(1)
,
Conor A. Nixon
(3)
,
Peter J. Gierasch
(4)
,
Paul N. Romani
(5, 6, 7)
,
Bruno Bézard
(8, 5, 6, 7)
,
Patrick G. J. Irwin
(4)
,
Gordon L. Bjoraker
(4)
,
J. C. Brasunas
(4)
,
Donald E. Jennings
(4)
,
John C. Pearl
(4)
,
M. D. Smith
(9)
,
Glenn S. Orton
(9)
,
Linda J. Spilker
(2)
,
Robert Carlson
(8)
,
Simon B. Calcutt
(8)
,
Peter L. Read
(8)
,
Frederic W. Taylor
(8)
,
Paul David Parrish
(5, 6, 7)
,
Maria Antonella Barucci
(5, 6, 7)
,
Régis Courtin
(5, 6, 7)
,
Athéna Coustenis
(5, 6, 7)
,
Daniel Gautier
(5, 6, 7)
,
Emmanuel Lellouch
(5, 6, 7)
,
André Marten
(5, 6, 7)
,
Renée Prangé
(5, 6, 7)
,
Yvon Biraud
(5, 6, 7)
,
Thierry Fouchet
(10, 5, 6, 7)
,
C. Ferrari
(11)
,
Tobias C. Owen
(12)
,
Mian M. Abbas
(1)
,
Robert E. Samuelson
(13)
,
François Raulin
(14)
,
Peter A. Ade
(15)
,
Catherine J. Cesarsky
(16)
,
K. U. Grossman
(17)
,
Angioletta Coradini
1
Department of Astronomy, University of Maryland
2 SSAI - Science Systems and Applications, Inc. [Lanham]
3 Department of Astronomy, Cornell University
4 GSFC - NASA Goddard Space Flight Center
5 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
6 Physique des plasmas
7 Pôle Planétologie du LESIA
8 AOPP - Department of Atmospheric, Oceanic and Planetary Physics [Oxford]
9 JPL - Jet Propulsion Laboratory
10 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
11 Institute for Astronomy, University of Hawaii
12 Marshall Space Flight Center, NASA
13 LISA (UMR_7583) - Laboratoire Interuniversitaire des Systèmes Atmosphériques
14 Cardiff University
15 ESO - European Southern Observatory
16 Department of Physics, Gesamthochschule Wuppertal
17 Instituto di Astrofisica Spaziale - CNR, Area della recerca di Tor Vergata
2 SSAI - Science Systems and Applications, Inc. [Lanham]
3 Department of Astronomy, Cornell University
4 GSFC - NASA Goddard Space Flight Center
5 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
6 Physique des plasmas
7 Pôle Planétologie du LESIA
8 AOPP - Department of Atmospheric, Oceanic and Planetary Physics [Oxford]
9 JPL - Jet Propulsion Laboratory
10 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
11 Institute for Astronomy, University of Hawaii
12 Marshall Space Flight Center, NASA
13 LISA (UMR_7583) - Laboratoire Interuniversitaire des Systèmes Atmosphériques
14 Cardiff University
15 ESO - European Southern Observatory
16 Department of Physics, Gesamthochschule Wuppertal
17 Instituto di Astrofisica Spaziale - CNR, Area della recerca di Tor Vergata
Thierry Fouchet
- Fonction : Auteur
- PersonId : 756578
- IdHAL : thierry-fouchet
- ORCID : 0000-0001-9040-8285
- IdRef : 089352556
C. Ferrari
- Fonction : Auteur
- PersonId : 1111568
- IdHAL : cecile-ferrari
- ORCID : 0000-0001-5962-7439
Angioletta Coradini
- Fonction : Auteur
Résumé
The Earth's equatorial stratosphere shows oscillations in which the east-west winds reverse direction and the temperatures change cyclically with a period of about two years. This phenomenon, called the quasi-biennial oscillation, also affects the dynamics of the mid- and high-latitude stratosphere and weather in the lower atmosphere. Ground-based observations have suggested that similar temperature oscillations (with a 4-5-yr cycle) occur on Jupiter, but these data suffer from poor vertical resolution and Jupiter's stratospheric wind velocities have not yet been determined. Here we report maps of temperatures and winds with high spatial resolution, obtained from spacecraft measurements of infrared spectra of Jupiter's stratosphere. We find an intense, high-altitude equatorial jet with a speed of ~140ms-1, whose spatial structure resembles that of a quasi-quadrennial oscillation. Wave activity in the stratosphere also appears analogous to that occurring on Earth. A strong interaction between Jupiter and its plasma environment produces hot spots in its upper atmosphere and stratosphere near its poles, and the temperature maps define the penetration of the hot spots into the stratosphere.