Magnetospheric electric fields and plasma sheet injection to low L-shells during the 4-5 June 1991 magnetic storm: Comparison between the Rice Convection Model and observations
Magnetospheric electric fields and plasma sheet injection to low L-shells during the 4-5 June 1991 magnetic storm: Comparison between the Rice Convection Model and observations
复制标题
DOI：
10.1029/2003ja010208
复制
发表时间：
2004-02
影响因子：
--
通讯作者：
T. Garner;R. Wolf;R. Spiro;W. J. Burke;B. Fejer;S. Sazykin;J. Roeder;M. Hairston
中科院分区：
文献类型：
--
作者：
T. Garner;R. Wolf;R. Spiro;W. J. Burke;B. Fejer;S. Sazykin;J. Roeder;M. Hairston
[1]利用黄昏侧内磁层的联合释放和辐射实验(CRRES)卫星和极地电离层的三个国防气象卫星计划(DMSP)航天器，很好地观测到了1991年6月4-5日的大磁暴。这些观测结果与赖斯对流模型(RCM)的结果进行了比较，后者自洽地计算了内部磁层电场和粒子分布。这一案例研究使用了迄今为止最完整的RCM运行，展示了磁层风暴的两个重要特征，即亚极光极化流的发展和等离子体片粒子向内磁层深处的注入。特别是，RCM预测了CRRES卫星在第二次注入期间观测到的L=4附近的电场峰值。RCM计算和DMSP数据都显示SAPS事件具有相似的一般特征，尽管没有详细的逐点一致。在模拟中，SAPS是由等离子体片质子对L的深度穿透和等离子体片电子向地球的穿透而产生的。同样，组成风暴时环电流的绝大多数离子来自等离子体片；组成风暴前平静时间环电流的大多数粒子在环电流注入期间通过日侧磁层顶逃逸。RCM证明了等离子体片离子到达所有环电流轨道的能力，并合理地预测了注入粒子(离子和电子)的位置。然而，它高估了内磁层中的离子通量。
[1] The major magnetic storm of 4–5 June 1991 was well observed with the Combined Release and Radiation Experiment (CRRES) satellite in the duskside inner magnetosphere and with three Defense Meteorological Satellite Program (DMSP) spacecraft in the polar ionosphere. These observations are compared to results from the Rice Convection Model (RCM), which calculates the inner magnetospheric electric field and particle distribution self-consistently. This case study, which uses the most complete RCM runs to date, demonstrates two significant features of magnetospheric storms, the development of subauroral polarization streams (SAPS) and plasma-sheet particle injection deep into the inner magnetosphere. In particular, the RCM predicts the electric field peak near L = 4 that is observed by the CRRES satellite during the second injection. The RCM calculations and DMSP data both show SAPS events with similar general characteristics, though there is no detailed point-by-point agreement. In the simulation, SAPS are generated by the deep penetration of plasma sheet protons to L < 4 and Earthward of the plasma sheet electrons. Similarly, the vast majority of the ions that make up the storm-time ring current came from the plasma sheet; most of the particles that made up the prestorm quiet-time ring current escaped through the dayside magnetopause during ring current injection. The RCM demonstrates the capability of plasma sheet ions to reach all ring current orbits and predicts the location of the injected particles (both ions and electrons) reasonably well. However, it overpredicts the ion flux in the inner magnetosphere.