Sudden termination of martian dynamo?: implications from subcritical dynamo simulations
文献类型：期刊论文
| 作者 | Kuang, W.1; Jiang, W.2; Wang, T.3 |
| 刊名 | Geophysical research letters
 |
| 出版日期 | 2008-07-29 |
| 卷号 | 35期号:14页码:5 |
| ISSN号 | 0094-8276 |
| DOI | 10.1029/2008gl034183 |
| 通讯作者 | Kuang, w.(weijia.kuang-1@nasa.gov) |
| 英文摘要 | [1] the crustal magnetism measured by the mars global surveyor requires that mars possessed a strong internal field generated by a core dynamo in its early history. we use a numerical model to simulate the early martian dynamo, focusing on the minimum energy for sustaining an established dynamo. our results show that near its end, the martian dynamo could reverse frequently, and could be subcritical: the energy to sustain the dynamo is significantly less than that to excite the dynamo. in addition to a longer lifetime, the subcritical dynamo implies that it could be terminated suddenly with a very small perturbation and, once turned off, it could not be reactivated without substantial increase of the buoyancy force in the martian core. |
| WOS关键词 | MAGNETIC-FIELD ; THERMAL EVOLUTION ; MARS ; CORE ; GEODYNAMO ; CONVECTION |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000258149000003 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2385471 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Kuang, W. |
| 作者单位 | 1.NASA, Goddard Space Flight Ctr, Planetary Geodynam Lab, Greenbelt, MD 20771 USA 2.Univ Maryland, Joint Ctr Earth Syst Technol, Baltimore, MD 21250 USA 3.Chinese Acad Sci, Grad Univ, Sch Earth Sci, Beijing 10049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kuang, W.,Jiang, W.,Wang, T.. Sudden termination of martian dynamo?: implications from subcritical dynamo simulations[J]. Geophysical research letters,2008,35(14):5. |
| APA | Kuang, W.,Jiang, W.,&Wang, T..(2008).Sudden termination of martian dynamo?: implications from subcritical dynamo simulations.Geophysical research letters,35(14),5. |
| MLA | Kuang, W.,et al."Sudden termination of martian dynamo?: implications from subcritical dynamo simulations".Geophysical research letters 35.14(2008):5. |
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来源：中国科学院大学
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