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Changes in Jupiter's Zonal Wind Profile Preceding and During the Juno MissionWe present five epochs of WFC3 HST Jupiter observations taken between 2009-2016 and extract global zonal wind profiles for each epoch. Jupiter's zonal wind field is globally stable throughout these years, but significant variations in certain latitude regions persist. We find that the largest uncertainties in the wind field are due to vortices or hot-spots, and show residual maps which identify the strongest vortex flows. The strongest year-to-year variation in the zonal wind profiles is the 24 deg N jet peak. Numerous plume outbreaks have been observed in the Northern Temperate Belt and are associated with decreases in the zonal velocity and brightness. We show that the 24 deg N jet peak velocity and brightness decreased in 2012 and again in late 2016, following outbreaks during these years. Our February 2016 zonal wind profile was the last highly spatially resolved measurement prior to Juno s first science observations. The final 2016 data were taken in conjunction with Juno's perijove 3 pass on 11 December 2016, and show the zonal wind profile following the plume outbreak at 24 deg N in October 2016.
Document ID
20170010688
Document Type
Reprint (Version printed in journal)
Authors
Tollefson, Joshua (California Univ. Berkeley, CA, United States)
Wong, Michael H. (California Univ. Berkeley, CA, United States)
de Pater, Imke (California Univ. Berkeley, CA, United States)
Simon, Amy A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Orton, Glenn S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Rogers, John H. (British Astronomical Association West Barnham, United Kingdom)
Atreya, Sushil K. (Michigan Univ. Ann Arbor, MI, United States)
Cosentino, Richard G. (New Mexico Inst. of Mining and Technology Socorro, NM, United States)
Januszewski, William (Space Telescope Science Inst. Baltimore, MD, United States)
Morales-Juberias, Raul (New Mexico Inst. of Mining and Technology Socorro, NM, United States)
Marcus, Philip S. (California Univ. Berkeley, CA, United States)
Date Acquired
November 7, 2017
Publication Date
June 7, 2017
Publication Information
Publication: Icarus
Volume: 296
ISSN: 0019-1035
Subject Category
Lunar and Planetary Science and Exploration
Report/Patent Number
GSFC-E-DAA-TN43915
Funding Number(s)
CONTRACT_GRANT: NAS5-26555
CONTRACT_GRANT: NNX16AP12H
CONTRACT_GRANT: NNH14CK55B
Distribution Limits
Public
Copyright
Other
Keywords
Jupiter
cloud
zonal wind field
wind profile
Juno