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A Survey of Small-Scale Waves and Wave-Like Phenomena in Jupiter's Atmosphere Detected by JunoCam

Orton, Glenn S. and Tabataba-Vakili, Fachreddin and Eichstädt, Gerald and Rogers, John and Hansen, Candice J. and Momary, Thomas W. and Ingersoll, Andrew P. and Brueshaber, Shawn and Wong, Michael H. and Simon, Amy A. and Fletcher, Leigh N. and Ravine, Michael and Caplinger, Michael and Smith, Dakota and Bolton, Scott J. and Levin, Stephen M. and Sinclair, James A. and Thepenier, Chloe and Nicholson, Hamish and Anthony, Abigail (2020) A Survey of Small-Scale Waves and Wave-Like Phenomena in Jupiter's Atmosphere Detected by JunoCam. Journal of Geophysical Research. Planets, 125 (7). Art. No. e2019JE006369. ISSN 2169-9097. https://resolver.caltech.edu/CaltechAUTHORS:20200518-133141648

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Abstract

In the first 20 orbits of the Juno spacecraft around Jupiter, we have identified a variety of wave‐like features in images made by its public‐outreach camera, JunoCam. Because of Juno's unprecedented and repeated proximity to Jupiter's cloud tops during its close approaches, JunoCam has detected more wave structures than any previous surveys. Most of the waves appear in long wave packets, oriented east‐west and populated by narrow wave crests. Spacing between crests were measured as small as ~30 km, shorter than any previously measured. Some waves are associated with atmospheric features, but others are not ostensibly associated with any visible cloud phenomena and thus may be generated by dynamical forcing below the visible cloud tops. Some waves also appear to be converging, and others appear to be overlapping, possibly at different atmospheric levels. Another type of wave has a series of fronts that appear to be radiating outward from the center of a cyclone. Most of these waves appear within 5° of latitude from the equator, but we have detected waves covering planetocentric latitudes between 20°S and 45°N. The great majority of the waves appear in regions associated with prograde motions of the mean zonal flow. Juno was unable to measure the velocity of wave features to diagnose the wave types due to its close and rapid flybys. However, both by our own upper limits on wave motions and by analogy with previous measurements, we expect that the waves JunoCam detected near the equator are inertia‐gravity waves.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1029/2019je006369DOIArticle
ORCID:
AuthorORCID
Orton, Glenn S.0000-0001-7871-2823
Tabataba-Vakili, Fachreddin0000-0003-4339-7733
Eichstädt, Gerald0000-0002-9258-3770
Rogers, John0000-0002-4239-5907
Hansen, Candice J.0000-0001-5863-299X
Momary, Thomas W.0000-0002-1604-6930
Ingersoll, Andrew P.0000-0002-2035-9198
Brueshaber, Shawn0000-0002-3669-0539
Wong, Michael H.0000-0003-2804-5086
Simon, Amy A.0000-0003-4641-6186
Fletcher, Leigh N.0000-0001-5834-9588
Ravine, Michael0000-0003-4810-7352
Smith, Dakota0000-0002-1187-2344
Bolton, Scott J.0000-0002-9115-0789
Levin, Stephen M.0000-0003-2242-5459
Sinclair, James A.0000-0001-5374-4028
Additional Information:©2020 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Received 2 JAN 2020; Accepted 7 MAR 2020; Accepted article online 18 MAY 2020. Levin, Orton, Sinclair, and Tabataba‐Vakili were supported by funds from NASA distributed to the Jet Propulsion Laboratory, California Institute of Technology. Bolton and Hansen were supported by funds from NASA to the Southwest Research Institute and to the Planetary Science Institute, respectively. Brueshaber was supported by Western Michigan University's Dissertation Completion Fellowship. Ravine and Caplinger were supported by funds from NASA to Malin Space Science Systems. Fletcher is a Juno Participating Scientist supported by a Royal Society Research Fellowship and European Research Council Consolidator Grant (under the European Union's Horizon 2020 research and innovation program, grant agreement No. 723890) at the University of Leicester. Wong was supported by NASA's Juno Participating Scientist program; a part of his contribution was based on observations from program GO‐14661, made with the NASA/ESA Hubble Space Telescope, obtained at STScI, which is operated by AURA under NASA contract NAS5‐26555. Nicholson was supported by NASA funds to the Jet Propulsion Laboratory as a participant in Caltech's Summer Undergraduate Research Fellowship (SURF) program at JPL. Thepenier and Anthony were participants in JPL's Student Independent Research Internship (SIRI) program. We thank Agustin Sánchez‐Lavega and an anonymous reviewer for valuable comments that improved this article. All the images used in this study are available for direct download from the Planetary Data System at https://pds-imaging.jpl.nasa.gov/volumes/juno.html, in the data sets JNOJNC_0001 through JNOJNC_0011. The wind‐field data shown in Figure 6 can be accessed via Wong (2020), which also provides a reference to the global map shown in this figure. The map can also be referenced directly via Wong (2017). The values of the measurements shown in Figures 16 and 17 are displayed in a table in Section SI2 of the supporting information, and they can be accessed via Orton (2020). We note that preliminary results, including a version of Figure 11, were included in a NASA press release: https://www.jpl.nasa.gov/news/news.php?feature=7264.
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
Western Michigan UniversityUNSPECIFIED
Royal SocietyUNSPECIFIED
European Research Council (ERC)723890
NASANAS5-26555
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Subject Keywords:Jupiter; atmosphere; waves; Juno; JunoCam; dynamics
Issue or Number:7
Record Number:CaltechAUTHORS:20200518-133141648
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200518-133141648
Official Citation:Orton, G. S., Tabataba‐Vakili, F., Eichstädt, G., Rogers, J., Hansen, C. J., Momary, T. W., et al (2020). A survey of small‐scale waves and wave‐like phenomena in Jupiter's atmosphere detected by JunoCam. Journal of Geophysical Research: Planets, 125, e2019JE006369. https://doi.org/10.1029/2019JE006369
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103284
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:18 May 2020 20:42
Last Modified:01 Jul 2020 16:48

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