TY - JOUR
T1 - Global Distribution of ULF Waves During Magnetic Storms
T2 - Comparison of Arase, Ground Observations, and BATSRUS + CRCM Simulation
AU - Takahashi, Naoko
AU - Seki, Kanako
AU - Teramoto, Mariko
AU - Fok, Mei Ching
AU - Zheng, Yihua
AU - Matsuoka, Ayako
AU - Higashio, Nana
AU - Shiokawa, Kazuo
AU - Baishev, Dmitry
AU - Yoshikawa, Akimasa
AU - Nagatsuma, Tsutomu
N1 - Funding Information:
This work was supported by Grants-in- Aid for Scientific Research (16H06286) of Japan Society for the Promotion of Science. This work is partially supported by the Ministry of Science and Higher Education of the Russian Federation and by the Siberian Branch of the Russian Academy of Sciences (project II.16.2.1, registration number AAAA-A17-117021450059-3) and RFBR grant 18-45-140037 (D.B.). Simulation results have been provided by the Community Coordinated Modeling Center at Goddard Space Flight Center through their public Runs on Request system (https://ccmc.gsfc.nasa.gov). Science data of the ERG (Arase) satellite were obtained from the ERG Science Center (ERG-SC) website (https://ergsc.isee. nagoya-u.ac.jp/). The present study analyzed the MGF v01.00 data and the XEP v00.00 data. The Arase satellite data will be publicly available via ERG-SC on a project-agreed schedule. The data management of the XEP was supported by the JAXA/SEES. Solar wind parameters shown in Figure 4, Dst, SYM-H, and AE indices were obtained from World Data Center for Geomagnetism, Kyoto (http://wdc.kugi.kyoto-u.ac.jp). The ground magnetometer of Norilsk was provided by A. Pashinin and N. Nishitani. The other ground magnetometers were supplied from THEMIS-GBO, National Institute of Polar Research, Technical University of Denmark, Tromsø Geophysical Observatory, Geological Survey of Sweden, Finnish Meteorological Institute, and AARI in Russia. The authors also appreciate INTERMAGNET for promoting high standards of magnetic observatory practice (www. intermagnet.org). We would like to thank K. Keika for providing helpful discussions in this study.
Funding Information:
This work was supported by Grants-in-Aid for Scientific Research (16H06286) of Japan Society for the Promotion of Science. This work is partially supported by the Ministry of Science and Higher Education of the Russian Federation and by the Siberian Branch of the Russian Academy of Sciences (project II.16.2.1, registration number AAAA-A17-117021450059-3) and RFBR grant 18-45-140037 (D.B.). Simulation results have been provided by the Community Coordinated Modeling Center at Goddard Space Flight Center through their public Runs on Request system (https://ccmc.gsfc.nasa.gov). Science data of the ERG (Arase) satellite were obtained from the ERG Science Center (ERG-SC) website (https://ergsc.isee.nagoya-u.ac.jp/). The present study analyzed the MGF v01.00 data and the XEP v00.00 data. The Arase satellite data will be publicly available via ERG-SC on a project-agreed schedule. The data management of the XEP was supported by the JAXA/SEES. Solar wind parameters shown in Figure, Dst, SYM-H, and AE indices were obtained from World Data Center for Geomagnetism, Kyoto (http://wdc.kugi.kyoto-u.ac.jp). The ground magnetometer of Norilsk was provided by A. Pashinin and N. Nishitani. The other ground magnetometers were supplied from THEMIS-GBO, National Institute of Polar Research, Technical University of Denmark, Troms? Geophysical Observatory, Geological Survey of Sweden, Finnish Meteorological Institute, and AARI in Russia. The authors also appreciate INTERMAGNET for promoting high standards of magnetic observatory practice (www.intermagnet.org). We would like to thank K. Keika for providing helpful discussions in this study.
Publisher Copyright:
©2018. American Geophysical Union. All Rights Reserved.
PY - 2018/9/28
Y1 - 2018/9/28
N2 - 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.
AB - 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.
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U2 - 10.1029/2018GL078857
DO - 10.1029/2018GL078857
M3 - Article
AN - SCOPUS:85053878896
SN - 0094-8276
VL - 45
SP - 9390
EP - 9397
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 18
ER -