Global Penetration and Propagation Processes of Electromagnetic Disturbances from the Polar to the Equatorial Ionosphere

极地到赤道电离层电磁扰动的全球穿透和传播过程

基本信息

  • 批准号:
    10440137
  • 负责人:
  • 金额:
    $ 8.06万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    1998
  • 资助国家:
    日本
  • 起止时间:
    1998 至 2001
  • 项目状态:
    已结题

项目摘要

A purpose of this study is to understand a large-scale electromagnetic penetration and propagation process in the atmospheric transition region (the region from 80 to 5-600 Km in the height where neutral and charged particles are mixed in) from the polar to equatorial regions. By using the solar wind and particle data from the WIND and ISTP satellites, we clarified the relationships between the temporal and spatial scales of disturbances in the solar wind and the large-scale electromagnetic disturbances that can penetrate even into the equatorial region on the ground. Especially, in term of the composite data analysis from the satellites and ground-based observations, we can theoretically understand the electromagnetic coupling process between the polar and equatorial regions, including the solar wind, magnetosphere, ionosphere, atmosphere and conductive earth.(1) A study on a propagation of the transient response of the magnetosphereIn this study, by investigation of the characteristi … More cs of the polarization of magnetic variations on the ground due to the SI-event, we cleared that magnetic variations in the polar region associated with SC/SI events could be interpreted only by a motion of the vortex currents generated in the polar ionosphere. The motion of the ionosphere vortex current includes the information of the deformation of the magnetopause. Therefore, the present results suggest a possibility of the monitoring for the transient response of the whole magnetosphere from ground magnetic variations.(2) A study on a global propagation of the ULF pulsationsFrom analyses of magnetic data from the Circum-pan-Pacific Magnetometer Network (CPMN) stations, it can be concluded that Pi 2 magnetic pulsations observed on the ground consist of at least five components : (1) a bouncing mode of impulsive field-aligned current at the auroral latitude, (2) a substorm current wedge oscillation (3) a surface wave at the plasmapause, (4) a cavity-like oscillation in the inner magnetosphere, and (5) a transmission of the Pi 2 electric field from the nightside auroral latitude to the dayside equatorial region. The ground Pi 2 pulsations are an ensemble of these five modes, which show their own propagations (or timings) and spatial illuminations.(3) A study on the disturbance of the electric field in the ionosphereIn order to investigate the electric disturbances in the ionosphere, we installed the FM/CW radar at SASAGURI (Fukuoka City), and made steady observation of the variations of the ionosphere. As a result, we could successfully detect the temporal and spatial variations of the ionosphere due to the imposed electric field on the polar ionosphere. These observations reveal that the electric field imposed on the polar ionosphere spread event to the equatorial region almost simultaneously. Less
这项研究的目的是了解从极地到赤道地区大气过渡区(中性粒子和带电粒子混合在一起的高度从80公里到5-600公里的区域)的大尺度电磁穿透和传播过程。利用来自WIND和ISTP卫星的太阳风和粒子数据,我们阐明了太阳风中扰动的时间和空间尺度与甚至可以穿透到地面赤道地区的大尺度电磁扰动之间的关系。特别是,通过卫星和地面观测的综合数据分析,我们可以从理论上理解极地和赤道地区,包括太阳风、磁层、电离层、大气和导电地球之间的电磁耦合过程。(1)磁层瞬变响应的传播研究由于SI事件引起的地面磁变化的极化cs更多,我们明确了与SC/SI事件相关的极区的磁变化只能通过在极地电离层中产生的涡流的运动来解释。电离层涡流的运动包含了磁层顶形变的信息。(2)超低频脉动的全球传播研究。通过对环太平洋磁力计网络(CPMN)站的磁数据的分析,可以得出结论:地面上观测到的PI 2磁脉动至少由五个分量组成:(1)极光纬度脉冲场定向电流的反弹模式,(2)亚暴电流楔形振荡(3)等离子体顶面波,(4)内磁层类空腔振荡,(5)PI2电场从黑夜极光纬度向白昼赤道地区的传输。(3)电离层电场扰动研究为了研究电离层中的电场扰动,我们在福冈市SASAGURI安装了FM/CW雷达,对电离层的变化进行了稳定的观测。因此,我们可以成功地探测到由于施加在极地电离层上的电场而引起的电离层的时间和空间变化。这些观测表明,施加在极地电离层上的电场几乎同时将事件传播到赤道地区。较少

项目成果

期刊论文数量(528)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Kawano, H., R.Nakamura, S.Kokubun, T.Mukai, T.Yamamoto, K.Yumoto, J.A.Slavin: "Substorm-assocaited shrinkage of the mid-tail magnetosphere : IACG campaign #2"Advance in Space Research. 1689-1696 (2000)
Kawano, H., R.Nakamura, S.Kokubun, T.Mukai, T.Yamamoto, K.Yumoto, J.A.Slavin:“与亚暴相关的中尾磁层收缩:IACG 活动
  • DOI:
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  • 影响因子:
    0
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Shiokawa, K., Y.Otsuka, T.Ogawa, N.Balan, K.Igarashi, A.J.Ridley, D.J.Knipp, A.Saito, K.Yumoto: "A large-scale traveling ionospheric disturbance during the magnetric storm of September 15, 1999"J.Geophys.Res.. 106(in press). (2001)
Shiokawa, K.、Y.Otsuka、T.Okawa、N.Balan、K.Igarashi、A.J.Ridley、D.J.Knipp、A.Saito、K.Yumoto:“9 月 15 日磁暴期间的大规模移动电离层扰动
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Uozumi,T.,K.Yumoto,H.Kawano,A.Yoshikawa,S.I.Solovyev,E.F.Vershinin,and the 210 MM Observation Group: "Characteristics of energy transfer of Pi 2 magnetic pulsations : Latitudinal dependence"Geophys.Res.Lett.. 27, No.27. 1619-1623 (2000)
Uozumi,T.,K.Yumoto,H.Kawano,A.Yoshikawa,S.I.Solovyev,E.F.Vershinin和210 MM观测组:“Pi 2磁脉动能量转移的特征:纬度依赖性”Geophys.Res.Lett。
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    0
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  • 通讯作者:
Itonaga M., A.Yoshikawa, K.Yumoto, S.Fujita and H.Nakata: "A study on the generation of field-aligned current in the magnetosphere"Mem.Fac.Sci., Kyushu Univ., Ser.D, Earth and Planet.Sci. 16, No.1. 1-9 (2000)
Itonaga M.、A.Yoshikawa、K.Yumoto、S.Fujita 和 H.Nakata:“磁层中场对准电流生成的研究”Mem.Fac.Sci.,九州大学,Ser.D,
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YUMOTO Kiyohumi其他文献

Space Weather Information Network on JGNII
JGNII 空间天气信息网

YUMOTO Kiyohumi的其他文献

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{{ truncateString('YUMOTO Kiyohumi', 18)}}的其他基金

Study on the Couplings of Heliosphere-Magnetosphere-Ionosphere-Atmosphere by Global Sq Current Observation
全球Sq流观测研究日光层-磁层-电离层-大气层耦合
  • 批准号:
    22253007
  • 财政年份:
    2010
  • 资助金额:
    $ 8.06万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Study on Energy and Momentum Transfer from the Solar Wind into the Geospace using Circum-pan Pacific Network Observations
利用环太平洋网络观测研究太阳风到地球空间的能量和动量转移
  • 批准号:
    18253005
  • 财政年份:
    2006
  • 资助金额:
    $ 8.06万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Study on Geospace Environment Change by Energy and Momentum Transfer from the Solar Wind into the Equatorial Ionosphere
太阳风向赤道电离层能量和动量转移引起的地球空间环境变化研究
  • 批准号:
    15253005
  • 财政年份:
    2003
  • 资助金额:
    $ 8.06万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Development of Data Acquisition System for Space Weather Study
空间天气研究数据采集系统的开发
  • 批准号:
    13554016
  • 财政年份:
    2001
  • 资助金额:
    $ 8.06万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Solar Wind Energy Transfer into Magneto-Ionos-Atmosphere
太阳能风能转移到磁电离大气层
  • 批准号:
    12373003
  • 财政年份:
    2000
  • 资助金额:
    $ 8.06万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Energy transfer of solar wind-magnetosphere interaction
太阳风-磁层相互作用的能量转移
  • 批准号:
    10041122
  • 财政年份:
    1998
  • 资助金额:
    $ 8.06万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A).
Solar Wind Energy Transfer into the Equatorial Ionosphere
太阳风能转移到赤道电离层
  • 批准号:
    08041105
  • 财政年份:
    1996
  • 资助金额:
    $ 8.06万
  • 项目类别:
    Grant-in-Aid for international Scientific Research

相似海外基金

Investigations of Polar Disturbances in the Arctic Upper Atmosphere
北极高层大气极地扰动的调查
  • 批准号:
    0352742
  • 财政年份:
    2004
  • 资助金额:
    $ 8.06万
  • 项目类别:
    Standard Grant
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