globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116316
论文题名:
Variation of the equatorial moments of inertia associated with a 6-year westward rotary motion in the Earth
作者: Chao B.F.; Yu Y.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 542
语种: 英语
中文关键词: 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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164910
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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

Recommended Citation:
Chao B.F.,Yu Y.. Variation of the equatorial moments of inertia associated with a 6-year westward rotary motion in the Earth[J]. Earth and Planetary Science Letters,2020-01-01,542
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