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DOI | 10.1029/2019GL086351 |
A New Method for Accurate and Efficient Modeling of the Local Ocean Induction Effects. Application to Long-Period Responses from Island Geomagnetic Observatories | |
Chen, Chaojian1; Kruglyakov, Mikhail1,2; Kuvshinov, Alexey1 | |
2020-04-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Russia |
英文摘要 | There is significant interest in constraining mantle conductivity beneath oceans. One data source to probe oceanic mantle conductivity is magnetic fields measured at island observatories. From these data local responses are estimated and then inverted in terms of conductivity. However, island responses may be strongly distorted by the ocean induction effect (OIE) originating from conductivity contrasts between ocean and land. Insufficiently accurate accounting for OIE may lead to wrong interpretation of the responses. OIE is generally modeled by global simulations using relatively coarse grids to represent bathymetry. We explore whether very local bathymetry influences island responses. To address this question we developed a methodology for efficient modeling of effects of bathymetry of any resolution. On an example of two island observatories we demonstrate that small-scale bathymetry dramatically influences the responses. Using new methodology we obtain new conductivity models beneath considered islands and observe very good agreement between modeled and experimental responses. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000530332600018 |
WOS关键词 | ELECTRICAL-CONDUCTIVITY ; WATER-CONTENT ; MANTLE ; INVERSION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/279852 |
专题 | 气候变化 |
作者单位 | 1.Swiss Fed Inst Technol, Inst Geophys, Zurich, Switzerland; 2.Inst Phys Earth, Geoelectromagnet Res Ctr, Moscow, Russia |
推荐引用方式 GB/T 7714 | Chen, Chaojian,Kruglyakov, Mikhail,Kuvshinov, Alexey. A New Method for Accurate and Efficient Modeling of the Local Ocean Induction Effects. Application to Long-Period Responses from Island Geomagnetic Observatories[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(8). |
APA | Chen, Chaojian,Kruglyakov, Mikhail,&Kuvshinov, Alexey.(2020).A New Method for Accurate and Efficient Modeling of the Local Ocean Induction Effects. Application to Long-Period Responses from Island Geomagnetic Observatories.GEOPHYSICAL RESEARCH LETTERS,47(8). |
MLA | Chen, Chaojian,et al."A New Method for Accurate and Efficient Modeling of the Local Ocean Induction Effects. Application to Long-Period Responses from Island Geomagnetic Observatories".GEOPHYSICAL RESEARCH LETTERS 47.8(2020). |
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