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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Modeling the observed proton aurora and ionospheric convection responses to changes in the IMF clock angle: 1. Persistence of cusp proton aurora
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Modeling the observed proton aurora and ionospheric convection responses to changes in the IMF clock angle: 1. Persistence of cusp proton aurora

机译：观察到的质子极光和建模电离层对流对变化的反应国际货币基金组织(IMF)时钟角度:1。质子极光

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摘要

We employ a numerical model of cusp ion precipitation and proton aurora emission to fit variations of the peak Doppler-shifted Lyman-α intensity observed on 26 November 2000 by the SI-12 channel of the FUV instrument on the IMAGE satellite. The major features of this event appeared in response to two brief swings of the interplanetary magnetic field (IMF) toward a southward orientation. We reproduce the observed spatial distributions of this emission on newly opened field lines by combining the proton emission model with a model of the response of ionospheric convection. The simulations are based on the observed variations of the solar wind proton temperature and concentration and the interplanetary magnetic field clock angle. They also allow for the efficiency, sampling rate, integration time and spatial resolution of the FUV instrument. The good match (correlation coefficient 0.91, significant at the 98% level) between observed and modeled variations confirms the time constant (～4 min) for the rise and decay of the proton emissions predicted by the model for southward IMF conditions. The implications for the detection of pulsed magnetopause reconnection using proton aurora are discussed for a range of interplanetary conditions.
机译：我们使用尖端离子的数值模型降水和质子极光排放符合莱曼峰因都卜勒频移-α的变化观察到的2000年11月26日的强度秉风通道FUV仪器的形象卫星。出现在应对两个短暂的波动行星际磁场(IMF)向向南方向。在新空间分布的排放开启电场线结合质子排放模型与模型的响应电离层对流。太阳风的观察到的变化温度和浓度和质子行星际磁场时钟角。也允许效率,采样率,集成的时间和空间分辨率FUV乐器。系数0.91,在98%显著水平)观察和建模之间的变化证实了时间常数(约4分钟)的崛起和腐烂质子排放量的预测的模型向南为国际货币基金组织的条件。脉冲磁层的检测重新连接使用质子极光星际的一系列条件。

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