| DOI: | 10.1002/2015GL064733
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| 论文题名: | Slow magnetic Rossby waves in the Earth's core |
| 作者: | Hori K.; Jones C.A.; Teed R.J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9100
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| EISSN: | 1944-8831
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| 出版年: | 2015
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| 卷: | 42, 期:16 | | 起始页码: | 6622
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| 结束页码: | 6629
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| 语种: | 英语
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| 英文关键词: | core dynamics
; dynamo simulations
; secular variation
; waves
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| Scopus关键词: | Interactive devices
; Magnetism
; Wave propagation
; Waves
; Core dynamics
; Dynamo simulation
; Earth's core
; Higher latitudes
; Rossby wave
; Secular variation
; Toroidal fields
; Wave components
; Mechanical waves
; azimuth
; core analysis
; latitude
; magnetic field
; Rossby number
; secular variation
; wave propagation
; zonal flow
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| 英文摘要: | The westward drift component of the secular variation is likely to be a signal of waves riding on a background mean flow. By separating the wave and mean flow contributions, we can infer the strength of the "hidden" azimuthal part of the magnetic field within the core. We explore the origin of the westward drift commonly seen in dynamo simulations and show that it propagates at the speed of the slow magnetic Rossby waves with respect to a mean zonal flow. Our results indicate that such waves could be excited in the Earth's core and that wave propagation may indeed play some role in the longitudinal drift, particularly at higher latitudes where the wave component is relatively strong, the equatorial westward drift being dominated by the mean flow. We discuss a potential inference of the RMS toroidal field strength within the Earth's core from the observed drift rate. © 2015. The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84941736922&doi=10.1002%2f2015GL064733&partnerID=40&md5=e48094f7048a7a4e12a2627703657090
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8716
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Applied Mathematics, University of Leeds, Leeds, United Kingdom
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| Recommended Citation: | |
Hori K.,Jones C.A.,Teed R.J.. Slow magnetic Rossby waves in the Earth's core[J]. Geophysical Research Letters,2015-01-01,42(16).
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