Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074699 |
A Dynamic Model of Mercury's Magnetospheric Magnetic Field | |
Korth, Haje1; Johnson, Catherine L.2,3; Philpott, Lydia2; Tsyganenko, Nikolai A.4; Anderson, Brian J.1 | |
2017-10-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:20 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada; Russia |
英文摘要 | Mercury's solar wind and interplanetary magnetic field environment is highly dynamic, and variations in these external conditions directly control the current systems and magnetic fields inside the planetary magnetosphere. We update our previous static model of Mercury's magnetic field by incorporating variations in the magnetospheric current systems, parameterized as functions of Mercury's heliocentric distance and magnetic activity. The new, dynamic model reproduces the location of the magnetopause current system as a function of systematic pressure variations encountered during Mercury's eccentric orbit, as well as the increase in the cross-tail current intensity with increasing magnetic activity. Despite the enhancements in the external field parameterization, the residuals between the observed and modeled magnetic field inside the magnetosphere indicate that the dynamic model achieves only a modest overall improvement over the previous static model. The spatial distribution of the residuals in the magnetic field components shows substantial improvement of the model accuracy near the dayside magnetopause. Elsewhere, the large-scale distribution of the residuals is similar to those of the static model. This result implies either that magnetic activity varies much faster than can be determined from the spacecraft's passage through the magnetosphere or that the residual fields are due to additional external current systems not represented in the model or both. Birkeland currents flowing along magnetic field lines between the magnetosphere and planetary high-latitude regions have been identified as one such contribution. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416761600008 |
WOS关键词 | SOLAR-WIND CONTROL ; MESSENGER OBSERVATIONS ; MAGNETOPAUSE ; RECONNECTION ; CURRENTS ; MISSION ; SHAPE |
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/28322 |
专题 | 气候变化 |
作者单位 | 1.Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA; 2.Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC, Canada; 3.Planetary Sci Inst, Tucson, AZ USA; 4.St Petersburg State Univ, Inst & Fac Phys, St Petersburg, Russia |
推荐引用方式 GB/T 7714 | Korth, Haje,Johnson, Catherine L.,Philpott, Lydia,et al. A Dynamic Model of Mercury's Magnetospheric Magnetic Field[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(20). |
APA | Korth, Haje,Johnson, Catherine L.,Philpott, Lydia,Tsyganenko, Nikolai A.,&Anderson, Brian J..(2017).A Dynamic Model of Mercury's Magnetospheric Magnetic Field.GEOPHYSICAL RESEARCH LETTERS,44(20). |
MLA | Korth, Haje,et al."A Dynamic Model of Mercury's Magnetospheric Magnetic Field".GEOPHYSICAL RESEARCH LETTERS 44.20(2017). |
条目包含的文件 | 条目无相关文件。 |
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