Odd gravitational harmonics of Jupiter: Effects of spherical versus nonspherical geometry and mathematical smoothing of the equatorially antisymmetric zonal winds across the equatorial plane | |
Kong, Dali1,2; Zhang, Keke2,3; Schubert, Gerald4 | |
刊名 | ICARUS |
2016-10-01 | |
卷号 | 277页码:416-423 |
关键词 | Jupiter Jupiter's interior Jupiter's atmosphere |
英文摘要 | Unlike the even gravitational coefficients of Jupiter that are caused by both the rotational distortion and the equatorially symmetric zonal winds, the odd jovian gravitational coefficients are directly linked to the depth of the equatorially antisymmetric zonal winds. Accurate estimation of the wind-induced odd coefficients and comparison with measurements of those coefficients would be key to understanding the structure of the zonal winds in the deep interior of Jupiter. We consider two problems in connection with the jovian odd gravitational coefficients. In the first problem, we show, by solving the governing equations for the northern hemisphere of Jupiter subject to an appropriate condition at the equatorial plane, that the effect of non-spherical geometry makes an insignificant contribution to the lowermost order odd gravitational coefficients. In the second problem, we investigate the effect of the equatorial smoothing used to avoid the discontinuity in the winds across the equatorial plane when the thermal wind equation is adopted to compute the odd gravitational coefficients. We reveal that, because of the dominant effect of the equatorial smoothing, the odd gravitational coefficients so obtained for deep zonal winds do not reflect physically realistic dynamics taking place in the deep interior of Jupiter. (C) 2016 Elsevier Inc. All rights reserved. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | SIGNATURE |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000380385100030 |
内容类型 | 期刊论文 |
源URL | [http://libir.pmo.ac.cn/handle/332002/16259] |
专题 | 紫金山天文台_暗物质和空间天文实验室 |
作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Planetary Sci, Shanghai 200030, Peoples R China 2.Univ Exeter, Coll Engn Math & Phys Sci, Ctr Geophys & Astrophys Fluid Dynam, Exeter EX4 4QF, Devon, England 3.Macau Univ Sci & Technol, Lunar & Planetary Sci Lab, Macau, Peoples R China 4.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA |
推荐引用方式 GB/T 7714 | Kong, Dali,Zhang, Keke,Schubert, Gerald. Odd gravitational harmonics of Jupiter: Effects of spherical versus nonspherical geometry and mathematical smoothing of the equatorially antisymmetric zonal winds across the equatorial plane[J]. ICARUS,2016,277:416-423. |
APA | Kong, Dali,Zhang, Keke,&Schubert, Gerald.(2016).Odd gravitational harmonics of Jupiter: Effects of spherical versus nonspherical geometry and mathematical smoothing of the equatorially antisymmetric zonal winds across the equatorial plane.ICARUS,277,416-423. |
MLA | Kong, Dali,et al."Odd gravitational harmonics of Jupiter: Effects of spherical versus nonspherical geometry and mathematical smoothing of the equatorially antisymmetric zonal winds across the equatorial plane".ICARUS 277(2016):416-423. |
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