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1999 Fiscal Year Final Research Report Summary

Joint Study on the M-I Coupling in the Southern Polar Cap

Research Project

Project/Area Number 09044053
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section一般
Research Field Space and upper atmospheric physics
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

FUKUNISHI Hirishi  Graduate School of Science, Tohoku University, Professor, 大学院・理学研究科, 教授 (90099937)

Co-Investigator(Kenkyū-buntansha) OKANO Shoichi  Graduate School of Science, Tohoku University, Professor, 大学院・理学研究科, 教授 (10004483)
YAMAGISHI Hisao  National Institute of Polar Research, Associate Professor, 研究系, 教授 (20132714)
SATO Natsuo  National Institute of Polar Research, Professor, 研究系, 教授 (50132709)
TAKAHASHI Yukihiro  Graduate School of Science, Tohoku University, Lecturer, 大学院・理学研究科, 講師 (50236329)
TAGUCHI Makoto  National Institute of Polar Research, Associate Professor, 南極圏環境モニタリング研究センター, 助教授 (70236404)
Project Period (FY) 1997 – 1999
KeywordsAntarctica / geomagnetic field / ULF wave / aurora / polar cap / Pc 3 / Pc 5 / Pc 1
Research Abstract

Data obtained by Automatic Geophysical Observatories (AGOs) located at Antarctic high latitude areas in the period of 1993 - 1997, such as aurora image, geomagnetic field, CAN, and VLF waves, have been analyzed carefully in order to investigate the mechanisms of aurora and geomagnetic activities in polar cap region, comparing with Super DARN HF radar network and satellite data. The most important findings are as follows : 1) Pc 1 bursts occur in polar cap region as well as cusp and cleft region, accompanying an impulsive geomagnetic variation caused by geomagnetic reconnection. 2) Pc 3 waves are frequently observed during daytime near 70 degree in geomagnetic latitude, while around 80 degree local time dependency of Pc 3 is comparably small. Based on the comparison with interplanetary magnetic field (IMF) it is inferred that Pc 3 source is located at upstream of shock front and the Pc 3 penetrates into the magnetosphere from subsolar region for small cone angle case while from high latitude in the tail region or low latitude boundary layer (LLBL) for large cone angle case. 3) Dynamic spectrum of Pc 5 in geomagnetic latitude range of 72 - 74 degree sometimes shows an arch structure caused by odd resonance wave. The occurrence frequency of Pc 5 becomes large in northward IMF condition, which implies relationship between generation of Pc 5 and geomagnetic reconnections. 4) Magnetic impulse event (MIE) occurs in the convection reversal boundary of 4 cell pattern observed in the case of northward IMF. MIE travels westward by 60 degree in longitude at a speed of 2 km/sec.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Sato M.,H.Fukunishi,L.J.Lanzerotti and C.G.Maclennan: "Magnetic impulse events and related Pcl bursts observed by the Automatic Geophysical Observatories network in Antarctica"J.Geophys.Res.. 104. 19,971-19,982 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Lanzerotti L.J.,A.Shono,H.Fukunishi and C.G.Maclennan: "Long-period hydromagnetic waves at very high geomagnetic latitudes"J.Geophys.Res.. 104. 28,423-28,435 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Arnoldy R.L.,J.L.Posch,H.Fukunishi: "Pi 1 magnetic pulsations in space and at high latitudes on the ground"J.Geophys.Res.. 103. 23,581 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Smith A.J.,M.J.Engebretson,H.Fukunishi: "Periodic and quasiperiodic ELF/VLF emissions observed by an array of Antarctic stations"J.Geophys.Res.. 103. 23,611-23,622 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sato M.,H.Fukunishi,R.Kataoka,A.Shono,S.B.Mende and M.Pinnock: "Dayside auroral dynamics observed by the AGO network in Antarctica"Adv.Polar Upper Atmos.Res.. 13. 67-68 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sato, M., H. Fukunishi, L.J. Lanzerotti and C.G. Maclennan: "Magnetic impulse events and related Pc1 bursts observed by the Automatic Geophysical Observatories network in Antarctica"J. Geophys. Res.. 104(9). 19971-19982 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Lanzerotti, L.J., A. Shono, H. Fukunishi and C.G. Maclennan: "Long-period hydromagnetic waves at very high geomagnetic latitudes"J. Geophys. Rs.. 104(9). 28423-28435 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Arnoldy, R. L., J. L. Posch, M. J. Engebretson, H. Fukunishi and H. J. Singer: "Pi 1 magnetic pulsations in space and at high latitudes on the ground"J. Geophys. Res.. 103(10). 23581-23591 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Smith, A. J., M. J. Engebretson, E. M. Klatt, U. S. Ian, R. L. Arnoldy and H. Fukunishi: "Periodic and quasiperiodic ELF/VLF emissions observed by an array of Antarctic stations"J. Geophys. Res.. 103(A10). 23611-23622 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sato, M., H. Fukunishi, R. Kataoka, A. Shono, L.J. Lanzerotti, J.H. Doolittle, S.B Mende and M. Pinnock: "Dayside auroral dynamics observed by the AGO network in Antarctica"Adv. Polar Upper Atmos. Res.. 13. 67-78 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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