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The distribution of ammonia on Jupiter from a preliminary inversion of Juno Microwave Radiometer data

Li, Cheng and Ingersoll, Andrew and Janssen, Michael and Levin, Steven and Bolton, Scott and Adumitroaie, Virgil and Allison, Michael and Arballo, John and Bellotti, Amadeo and Brown, Shannon and Ewald, Shawn and Jewell, Laura and Misra, Sidharth and Orton, Glenn and Oyafuso, Fabiano and Steffes, Paul and Williamson, Ross (2017) The distribution of ammonia on Jupiter from a preliminary inversion of Juno Microwave Radiometer data. Geophysical Research Letters, 44 (11). pp. 5317-5325. ISSN 0094-8276. doi:10.1002/2017GL073159.

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The Juno microwave radiometer measured the thermal emission from Jupiter's atmosphere from the cloud tops at about 1 bar to as deep as a hundred bars of pressure during its first flyby over Jupiter (PJ1). The nadir brightness temperatures show that the Equatorial Zone is likely to be an ideal adiabat, which allows a determination of the deep ammonia abundance in the range 362^(+33)_(-33) ppm. The combination of Markov chain Monte Carlo method and Tikhonov regularization is studied to invert Jupiter's global ammonia distribution assuming a prescribed temperature profile. The result shows (1) that ammonia is depleted globally down to 50–60 bars except within a few degrees of the equator, (2) the North Equatorial Belt is more depleted in ammonia than elsewhere, and (3) the ammonia concentration shows a slight inversion starting from about 7 bars to 2 bars. These results are robust regardless of the choice of water abundance.

Item Type:Article
Related URLs:
URLURL TypeDescription
Li, Cheng0000-0002-8280-3119
Ingersoll, Andrew0000-0002-2035-9198
Janssen, Michael0000-0001-5476-731X
Levin, Steven0000-0003-2242-5459
Bolton, Scott0000-0002-9115-0789
Adumitroaie, Virgil0000-0001-7239-0069
Allison, Michael0000-0001-9841-193X
Ewald, Shawn0000-0002-1567-9154
Jewell, Laura0000-0002-5853-8466
Misra, Sidharth0000-0003-1738-6635
Orton, Glenn0000-0001-7871-2823
Oyafuso, Fabiano0000-0002-8862-8737
Steffes, Paul0000-0003-3962-8957
Additional Information:© 2017 American Geophysical Union. Received 20 FEB 2017; Accepted 15 MAY 2017; Accepted article online 25 MAY 2017; Published online 3 JUN 2017. The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. C.L. was supported by a NASA Earth and Space Science Fellowship and by the NASA Postdoctoral Fellowship. The Juno mission and the team members at JPL were supported by NASA grant NNN12AA01C. We thank all Juno team members for the collaborative efforts. We note that Juno MWR data can be accessed on the Planetary Data System (PDS)
Group:Astronomy Department
Funding AgencyGrant Number
NASA Earth and Space Science FellowshipUNSPECIFIED
NASA Postdoctoral ProgramUNSPECIFIED
Subject Keywords:Jupiter; Juno; atmosphere; ammonia; retrieval
Issue or Number:11
Record Number:CaltechAUTHORS:20170526-081219993
Persistent URL:
Official Citation:Li, C., et al. (2017), The distribution of ammonia on Jupiter from a preliminary inversion of Juno microwave radiometer data, Geophys. Res. Lett., 44, 5317–5325, doi:10.1002/2017GL073159
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77794
Deposited By: Tony Diaz
Deposited On:06 Jun 2017 22:25
Last Modified:15 Nov 2021 17:34

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