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题名: Odd gravitational harmonics of Jupiter: Effects of spherical versus nonspherical geometry and mathematical smoothing of the equatorially antisymmetric zonal winds across the equatorial plane
作者: Kong, Dali1, 2; Zhang, Keke2, 3; Schubert, Gerald4
刊名: ICARUS
出版日期: 2016-10-01
卷号: 277, 页码:416-423
关键词: Jupiter ; Jupiter's interior ; Jupiter's atmosphere
DOI: 10.1016/j.icarus.2016.05.037
文章类型: Article
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
项目资助者: Leverhulme Trust Research Project(RPG-2015-096) ; Macau FDCT grant(039/2013/A2)
语种: 英语
WOS记录号: WOS:000380385100030
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16259
Appears in Collections:暗物质和空间天文实验室_期刊论文

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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
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