Changes in Jupiter's Zonal Wind Profile preceding and during the Juno mission

被引:70
|
作者
Tollefson, Joshua [1 ]
Wong, Michael H. [2 ]
de Patera, Imke [1 ,2 ]
Simon, Amy A. [3 ]
Orton, Glenn S. [4 ]
Rogers, John H. [5 ]
Atreya, Sushil K. [6 ]
Cosentino, Richard G. [7 ]
Januszewski, William [8 ]
Morales-Juberias, Raul [7 ]
Marcus, Philip S. [9 ]
机构
[1] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA
[3] NASA, Goddard Space Flight Ctr, Solar Syst Explorat Div 690 0, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA
[4] CALTECH, Jet Prop Lab, M-S 183-501,4800 Oak Grove Dr, Pasadena, CA 91109 USA
[5] British Astron Assoc, Burlington House, London W1J 0DU, England
[6] Univ Michigan, Dept Climate & Space Sci & Engn, Space Res Bldg,2455 Hayward St, Ann Arbor, MI 48109 USA
[7] New Mexico Inst Min & Technol, Dept Phys, Workman Ctr 345, 801 Leroy Pl, Socorro, NM 87801 USA
[8] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
[9] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA
关键词
SPEED JOVIAN JET; CASSINI IMAGES; CLOUD LEVEL; HOT-SPOTS; EQUATORIAL; ATMOSPHERE; DYNAMICS; FLOW; VARIABILITY; DISTURBANCE;
D O I
10.1016/j.icarus.2017.06.007
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We 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 degrees 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 degrees 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 degrees N in October 2016. (C) 2017 Elsevier Inc. All rights reserved.
引用
收藏
页码:163 / 178
页数:16
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