| 磁尾等离子体片对流对亚暴的影响 |
| |
| 引用本文： | 沈超,刘振兴,曹晋滨,张效信,汪学毅.磁尾等离子体片对流对亚暴的影响[J].空间科学学报,2000,20(3):216-223. |
| |
| 作者姓名： | 沈超 刘振兴 曹晋滨 张效信 汪学毅 |
| |
| 作者单位： | 中国科学院空间科学与应用研究中心, 北京 100080 |
| |
| 基金项目： | 中国科学院空间科学与应用研究中心所长基金资助项目 |
| |
| 摘 要： | 采用2(1/2)维全粒子电磁模拟方法研究了等离子体片中稳态对流及局地爆发高速流对磁层亚暴触发过程的影响.研究发现,地向瞬时局地高速流可触发磁场重联,导致储存于磁尾磁场能量的快速释放.但是,等离子体片稳态对流可抑制磁尾磁场重联过程.此项研究结果表明,局地爆发高速流能够触发磁层亚暴;而行星际磁场(IMF)持续南向时的稳态磁层对流期间,不易发生亚暴.
|
| 关 键 词： | 磁层亚暴 磁场重联 局地爆发高速流 稳态磁层对流 |
| 收稿时间： | 1999-08-12 |
| 修稿时间： | 1999年8月12日 |
THE EFFECT OF PLASMA SHEET FAST FLOWS ON SUBSTORMS |
| |
| SHEN Chao,LIU Zengxing,CAOJinbin,Zhang Xiaoxin,Wang Xueyi.THE EFFECT OF PLASMA SHEET FAST FLOWS ON SUBSTORMS[J].Chinese Journal of Space Science,2000,20(3):216-223. |
| |
| Authors: | SHEN Chao LIU Zengxing CAOJinbin Zhang Xiaoxin Wang Xueyi |
| |
| Institution: | Lab of Numerical Study for Heliospheric Physics, Center for Space Science and Applied Research, The Chinese Academy Of Sciences, Beijing 100080 |
| |
| Abstract: | In this investigation, using a two-dimensional particle code, we have exploredthe influence of the fast flows in plasma sheet on the triggering of substorms. Wehave found that, the local speedy flows in plasma sheet could trigger the magneticreconnection process and cause the fast release of magnetic energy stored in mag-netotail. However, continuing, stable and homogeneous fast convections in plasmasheet may depress the magnetic reconnection processes in magnetotail. The resultsobtained in this study indicate that the local Bursty Bulk Flows (BBFs) can lead tothe onsets of magnetospheric substorms; nevertheless, when the IMF keeps south-ward for a long time, there may be no substorm onset, which has been called SteadyMagnetospheric Convection processes. |
| |
| Keywords: | Magnetospheric substorms Magnetic reconnection Local bursty fast flows Stable magnetospheric convection |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《空间科学学报》浏览原始摘要信息 |
| 点击此处可从《空间科学学报》下载免费的PDF全文 |
|
