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DOI | 10.1029/2020GL090803 |
Fast Quasi‐Geostrophic Magneto‐Coriolis Modes in the Earth's core | |
F. Gerick; D. Jault; J. Noir | |
2020-12-08 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | Fast changes of Earth's magnetic field could be explained by inviscid and diffusion‐less quasi‐geostrophic (QG) Magneto‐Coriolis modes. We present a hybrid QG model with columnar flows and three‐dimensional magnetic fields and find modes with periods of a few years at parameters relevant to Earth's core. For the simple poloidal magnetic field that we consider here they show a localization of kinetic and magnetic energy in the equatorial region. This concentration of energy near the equator and the high frequency make them a plausible mechanism to explain similar features observed in recent geomagnetic field observations. Our model potentially opens a way to probe the otherwise inaccessible magnetic field structure in the Earth's outer core This article is protected by copyright. All rights reserved. |
领域 | 气候变化 |
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/308295 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | F. Gerick,D. Jault,J. Noir. Fast Quasi‐Geostrophic Magneto‐Coriolis Modes in the Earth's core[J]. Geophysical Research Letters,2020. |
APA | F. Gerick,D. Jault,&J. Noir.(2020).Fast Quasi‐Geostrophic Magneto‐Coriolis Modes in the Earth's core.Geophysical Research Letters. |
MLA | F. Gerick,et al."Fast Quasi‐Geostrophic Magneto‐Coriolis Modes in the Earth's core".Geophysical Research Letters (2020). |
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