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DOI | 10.1038/s41467-020-16109-8 |
Intradecadal variations in length of day and their correspondence with geomagnetic jerks | |
Duan, Pengshuo1; Huang, Chengli1,2 | |
2020-05-08 | |
发表期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2020 |
卷号 | 11期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Earth's core oscillations and magnetic field inside the liquid outer core cannot be observed directly from the surface, we can infer these information from the intradecadal variations in Earth's rotation rate defined by length of day. However, the fine time-varying characteristics as well as relevant mechanisms of the intradecadal variations are still unclear. Here we report that the intradecadal variations present a significant 8.6-year harmonic component with an unexpected increasing phenomenon, besides a 6-year decreasing oscillation. More importantly, we find that there is a very good correspondence between the extremes of the 8.6-year oscillation with geomagnetic jerks. The fast equatorial waves with subdecadal periods propagating at Earth's core surface may explain the origin of this 8.6-year oscillation. Earth rotation variation reflects the physics, dynamics and the magnetic field changes of Earth's interior. The authors find a significant similar to 8.6year periodic increasing oscillation in length of day and its good link to geomagnetic jerks related to Earth's core oscillations, which may be used to predict the future jerk timings. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000533939300008 |
WOS关键词 | TORSIONAL WAVES ; CORE SURFACE ; INNER-CORE ; SECULAR ACCELERATION ; NORMAL-MODES ; EARTHS ; OSCILLATION ; MANTLE ; EXCITATION ; DYNAMICS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249953 |
专题 | 资源环境科学 |
作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, CAS Key Lab Planetary Sci, Shanghai 200030, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Duan, Pengshuo,Huang, Chengli. Intradecadal variations in length of day and their correspondence with geomagnetic jerks[J]. NATURE COMMUNICATIONS,2020,11(1). |
APA | Duan, Pengshuo,&Huang, Chengli.(2020).Intradecadal variations in length of day and their correspondence with geomagnetic jerks.NATURE COMMUNICATIONS,11(1). |
MLA | Duan, Pengshuo,et al."Intradecadal variations in length of day and their correspondence with geomagnetic jerks".NATURE COMMUNICATIONS 11.1(2020). |
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