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Available online at www.sciencedirect.com Planetary and Space Science 51 (2003) 105112
 

Summary: Available online at www.sciencedirect.com
Planetary and Space Science 51 (2003) 105­112
www.elsevier.com/locate/pss
Composition and origin of the atmosphere of Jupiter--an update, and
implications for the extrasolar giant planets
S.K. Atreyaa;, P.R. Maha yb, H.B. Niemannb, M.H. Wongb, T.C. Owenc
aDepartment of Atmospheric, Oceanic and Space Sciences, The University of Michigan, Ann Arbor, MI 48109-2143, USA
bGoddard Space Flight Center, Greenbelt, MD 20771, USA
cInstitute for Astronomy, University of Hawaii, Honolulu, HI 96822, USA
Received 15 January 2002; received in revised form 21 April 2002; accepted 25 April 2002
Abstract
New developments have led to this update of the composition and origin of Jupiter's atmosphere that were originally discussed in our
Planet. Space Sci. 47 (1999) 1243 paper. Since Jupiter can provide important insight into the atmospheres of extrasolar giant planets (EGP),
we also discuss here the possible implications of the ˙rst detection of an atmosphere on an EGP. The ammonia mixing ratio on Jupiter has
now been determined directly from the Galileo probe mass spectrometer (GPMS) data, and its value relative to H2 (7:1±3:2)×10-4
in the
9­12 bar region, is found to be similar to the previously reported result inferred from the radio attenuation technique on Galileo. The Jovian
15
N=14
N ratio is found to be much lower than the terrestrial value at (2:3 ± 0:3) × 10-3

  

Source: Atreya, Sushil - Department of Atmospheric, Oceanic and Space Science, University of Michigan

 

Collections: Physics