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DOI	10.1016/j.epsl.2020.116316
	Variation of the equatorial moments of inertia associated with a 6-year westward rotary motion in the Earth
	Chao B.F.; Yu Y.
发表日期	2020
ISSN	0012821X
卷号	542
英文摘要	The westward-propagating rotary wave-2 displacement field in the mantle with the period of 6 years (Ding and Chao, 2018) predicts an ensuing 6-year variation in the Earth's two equatorial principle moments of inertia. In this paper we search for such signals in the sectoral Stokes coefficients C22 and S22 of the Earth's gravitational field. We analyze the monthly ΔC22 and ΔS22 data series derived from the satellite laser-ranging measurements for 1992-2018 (and the shorter series from the GRACE satellite, 2002-2017). We report unequivocal evidences found in ΔC22 and ΔS22 that conform to the predicted scenario in both amplitude and relative phasing. Conversely, this further corroborates the 6-year westward wave-2 motion in the Earth. © 2020 Elsevier B.V.
关键词	6-years equatorial moments of inertia gravity field rotary motion
英文关键词	Mechanics; Data series; Displacement field; Earth's gravitational field; Grace satellites; Moments of inertia; Principle moments; Rotary motions; Satellite laser ranging; Geodetic satellites; displacement; Earth rotation; GRACE; gravity field; inertia; planetary rotation; satellite data; wave propagation
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202532
作者单位	Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan; Scripps Institution of Oceanography, University of California at San Diego, La Jolla, CA, United States
推荐引用方式 GB/T 7714	Chao B.F.,Yu Y.. Variation of the equatorial moments of inertia associated with a 6-year westward rotary motion in the Earth[J],2020,542.
APA	Chao B.F.,&Yu Y..(2020).Variation of the equatorial moments of inertia associated with a 6-year westward rotary motion in the Earth.Earth and Planetary Science Letters,542.
MLA	Chao B.F.,et al."Variation of the equatorial moments of inertia associated with a 6-year westward rotary motion in the Earth".Earth and Planetary Science Letters 542(2020).