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DOI | 10.1029/2018GL078857 |
Global Distribution of ULF Waves During Magnetic Storms: Comparison of Arase, Ground Observations, and BATSRUSC plus CRCM Simulation | |
Takahashi, Naoko1; Seki, Kanako1; Teramoto, Mariko2; Fok, Mei-Ching3; Zheng, Yihua3; Matsuoka, Ayako4; Higashio, Nana5; Shiokawa, Kazuo2; Baishev, Dmitry6; Yoshikawa, Akimasa7; Nagatsuma, Tsutomu8 | |
2018-09-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:18页码:9390-9397 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; USA; Russia |
英文摘要 | During 26-29 March 2017 magnetic storm, the Arase satellite observed typical ultra low frequency (ULF) waves and acceleration of relativistic electrons. We simulate the global distribution of these ULF waves using CRCM with BATSRUS global magnetospheric magnetohydrodynamic model. The simulation can qualitatively reproduce the ULF waves observed by Arase at frequencies of 2-3 mHz. However, the simulated ULF wave power is 1-2 orders of magnitude smaller than the observation. The simulated ULF wave activity has a good correlation with the solar-wind dynamic pressure variation, while the wave activity on the ground is enhanced even during the recovery phase, possibly due to the Kelvin-Helmholtz instability and/or substorms. We also study the 3-6 April 2017 magnetic storm, in which low ULF wave activity and weak acceleration of relativistic electrons are seen. We suggest that the existence of ULF waves plays an important role in accelerating electrons up to relativistic energies. Plain Language Summary The Earth has the region of space that is controlled by the Earth's magnetic field, called the magnetosphere. When the temporary disturbance of the magnetosphere (magnetic storm) occurs, extremely high-energy electrons (a few MeV) accelerate around the Earth. It is considered that periodic waves with a frequency of 1-20 mHz, known as ultra low frequency (ULF) waves, play an important role in accelerating electrons up to relativistic energies. On 27 March 2017, Japanese satellite, called as "Arase," successfully observed ULF waves. We focus on this ULF waves and investigate the global activity of ULF waves using both numerical simulations and observations. The numerical simulation using in this study qualitatively reproduced the enhancement of ULF waves with a frequency range of 1.6-6.7 mHz, but its intensity is smaller than the Arase satellite observation. Comparing to ground observations, we found that the global ULF wave activity estimated by the numerical simulation is strongly affected by the dynamic pressure enhancement caused by a stream of charged particles from the Sun. In addition, we suggest that the ULF wave activity might affect the acceleration characteristics of high-energy electrons around the Earth. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447761300007 |
WOS关键词 | SOLAR-WIND ; PULSATIONS |
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/26631 |
专题 | 气候变化 |
作者单位 | 1.Univ Tokyo, Grad Sch Sci, Tokyo, Japan; 2.Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan; 3.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 4.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa, Japan; 5.Japan Aerosp Explorat Agcy, Tsukuba, Ibaraki, Japan; 6.Russian Acad Sci, Siberian Branch, Yu G Shafer Inst Cosmophys Res & Aeron, Yakutsk, Russia; 7.Kyushu Univ, Dept Earth & Planetary Sci, Fac Sci, Fukuoka, Fukuoka, Japan; 8.Natl Inst Informat Commun Technol, Tokyo, Japan |
推荐引用方式 GB/T 7714 | Takahashi, Naoko,Seki, Kanako,Teramoto, Mariko,et al. Global Distribution of ULF Waves During Magnetic Storms: Comparison of Arase, Ground Observations, and BATSRUSC plus CRCM Simulation[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(18):9390-9397. |
APA | Takahashi, Naoko.,Seki, Kanako.,Teramoto, Mariko.,Fok, Mei-Ching.,Zheng, Yihua.,...&Nagatsuma, Tsutomu.(2018).Global Distribution of ULF Waves During Magnetic Storms: Comparison of Arase, Ground Observations, and BATSRUSC plus CRCM Simulation.GEOPHYSICAL RESEARCH LETTERS,45(18),9390-9397. |
MLA | Takahashi, Naoko,et al."Global Distribution of ULF Waves During Magnetic Storms: Comparison of Arase, Ground Observations, and BATSRUSC plus CRCM Simulation".GEOPHYSICAL RESEARCH LETTERS 45.18(2018):9390-9397. |
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