Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL072811 |
Ultra-relativistic radiation belt extinction and ULF wave radial diffusion: Modeling the September 2014 extended dropout event | |
Ozeke, Louis G.1; Mann, Ian R.1,2; Murphy, Kyle R.2; Sibeck, David G.2; Baker, Daniel N.3 | |
2017-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA |
英文摘要 | In September 2014 an unusually long-lasting (10days) ultra-relativistic electron flux depletion occurred in the outer radiation belt despite ongoing solar wind forcing. We simulate this period using a ULF wave radial diffusion model, driven by observed ULF wave power coupled to flux variations at the outer boundary at L*=5, including empirical electron loss models due to chorus and hiss wave scattering. Our results show that unexplained rapid main phase loss, that depletes the belt within hours, is essential to explain the observations. Such ultra-relativistic electron extinction decouples the prestorm and poststorm fluxes, revealing the subsequent belt dynamics to be surprisingly independent of prestorm flux. However, once this extinction is included, ULF wave transport and coupling to the outer boundary explain the extended depletion event and also the eventual flux recovery. Neither local acceleration nor ongoing losses from hiss or chorus wave scattering to the atmosphere are required. |
英文关键词 | radiation belt ULF waves ultrarelativistic radial diffusion wave-particle interactions |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399762700002 |
WOS关键词 | GEOMAGNETIC STORMS ; INNER MAGNETOSPHERE ; ENERGETIC PARTICLE ; ELECTRONS ; DYNAMICS ; ACCELERATION ; TRANSPORT ; DENSITY ; PLASMA ; MARCH |
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/28003 |
专题 | 气候变化 |
作者单位 | 1.Univ Alberta, Dept Phys, Edmonton, AB, Canada; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 3.Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Ozeke, Louis G.,Mann, Ian R.,Murphy, Kyle R.,et al. Ultra-relativistic radiation belt extinction and ULF wave radial diffusion: Modeling the September 2014 extended dropout event[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(6). |
APA | Ozeke, Louis G.,Mann, Ian R.,Murphy, Kyle R.,Sibeck, David G.,&Baker, Daniel N..(2017).Ultra-relativistic radiation belt extinction and ULF wave radial diffusion: Modeling the September 2014 extended dropout event.GEOPHYSICAL RESEARCH LETTERS,44(6). |
MLA | Ozeke, Louis G.,et al."Ultra-relativistic radiation belt extinction and ULF wave radial diffusion: Modeling the September 2014 extended dropout event".GEOPHYSICAL RESEARCH LETTERS 44.6(2017). |
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