Odin space telescope monitoring of water vapor in the stratosphere of Jupiter
Artikel i vetenskaplig tidskrift, 2012

The Odin space telescope has monitored the H2O (1(10)-1(01)) line in Jupiter's stratosphere over the 2003-2009 period. When comparing these data with previous spectra obtained with SWAS and Odin over the 1999-2002 period, we see no significant variations in the line-to-continuum ratio of the H2O line over the whole period. We have however tentatively identified a decrease by similar to 15% of the line-to-continuum ratio between 2002 and 2007-2009, indicating that there was less H2O in the stratosphere of Jupiter in 2007-2009 than anticipated. We have tested the IDP (interplanetary dust particles) and SL9 (Shoemaker-Levy 9) 1D time-dependent models presented in Cavalie et al. [2008, Observation of water vapor in the stratosphere 613 of Jupiter with the Odin space telescope. Planetary and Space Science 56,1573-1584]. We present a series of scenarios that lead to satisfactory fits of the whole data set (1999-2002 and 2003-2009 periods) based on IDP and SL9 models. The evolution of Jupiter's stratospheric H2O that we have tentatively observed has however to be confirmed by Herschel/HIFI observations. If the decrease of the line-to-continuum ratio is confirmed by future observations, it would be a direct evidence that Jupiter's H2O comes from SW. In addition, this study shows that new constraints on Jupiter's eddy diffusion coefficient profile could be obtained (in the pressure ranges that are probed) from the monitoring of SW species in its stratosphere.

photochemical kinetics uncertainties

Shoemaker-Levy 9

origin

co

planets

hydrocarbons

comet shoemaker-levy-9

Atmosphere

satellite

carbon-monoxide

modeling titans atmosphere

Spectroscopy

Water

Jupiter

Eddy diffusion

giant

saturns atmosphere

Författare

T. Cavalie

Max Planck-institutet

Laboratoire d'Astrophysique de Bordeaux

Universite de Bordeaux

N. Biver

GEPI - Galaxies, Etoiles, Physique, Instrumentation

P. Hartogh

Max Planck-institutet

M. Dobrijevic

Universite de Bordeaux

Laboratoire d'Astrophysique de Bordeaux

F. Billebaud

Universite de Bordeaux

Laboratoire d'Astrophysique de Bordeaux

E. Lellouch

GEPI - Galaxies, Etoiles, Physique, Instrumentation

A. Sandqvist

Stockholm Observatory

J. Brillet

Laboratoire d'Astrophysique de Bordeaux

Universite de Bordeaux

A. Lecacheux

GEPI - Galaxies, Etoiles, Physique, Instrumentation

Åke Hjalmarson

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

U. Frisk

Swedish Space Corporation (SSC)

Michael Olberg

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Planetary and Space Science

0032-0633 (ISSN)

Vol. 61 1 3-14

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1016/j.pss.2011.04.001