Long-term polar motion on a quasi-fluid planetary body with an elastic lithosphere: Semi-analytic solutions of the time-dependent equation
文献类型：期刊论文
| 作者 | Harada, Yuji |
| 刊名 | ICARUS
 |
| 出版日期 | 2012-08-01 |
| 卷号 | 220期号:2页码:449-465 |
| 关键词 | Geophysics Interiors Planetary dynamics Rotational dynamics Tides Solid body |
| 英文摘要 | In order to understand long-term polar motion (so-called true polar wander), I present a large-scale and time-dependent solution of the Liouville equation based on the quasi-fluid approximation. The formulation includes the stabilizing effect of an oblate fossil shape memorized in an elastic lithosphere. Reorientation is assumed to be driven by a surface mass excess that is axi-symmetric and grows linearly with time. Without a fossil bulge, the time scale of true polar wander (specifically the time scale to settle to an equilibrium state) depends mainly on the time to build the load and its final magnitude. A fossil bulge works against reorientation such that the initial latitude of load emplacement now also influences the time scale. I conclude that it is necessary to consider where a load is emplaced in order to reconstruct paleo-poles on a planetary body with a remnant rotational bulge. (C) 2012 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] | ROTATIONAL STABILITY ; EARTHS ROTATION ; PLEISTOCENE DEGLACIATION ; CONTINENTAL-DRIFT ; CONVECTING EARTH ; MAXWELL EARTH ; MARS ; WANDER ; MANTLE ; MODELS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000308057200013 |
| 源URL | [http://119.78.226.72/handle/331011/18111]  |
| 专题 | 上海天文台_天文地球动力学研究中心 |
| 作者单位 | Chinese Acad Sci, Ctr Astrogeodynam Res, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Harada, Yuji. Long-term polar motion on a quasi-fluid planetary body with an elastic lithosphere: Semi-analytic solutions of the time-dependent equation[J]. ICARUS,2012,220(2):449-465. |
| APA | Harada, Yuji.(2012).Long-term polar motion on a quasi-fluid planetary body with an elastic lithosphere: Semi-analytic solutions of the time-dependent equation.ICARUS,220(2),449-465. |
| MLA | Harada, Yuji."Long-term polar motion on a quasi-fluid planetary body with an elastic lithosphere: Semi-analytic solutions of the time-dependent equation".ICARUS 220.2(2012):449-465. |
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