Solar wind drives magnetospheric dynamics through coupling with the geospace system at the magnetopause. While upstream fluctuations correlate with geomagnetic activity, their impact on the magnetopause energy transfer is an open question. In this study, we examine three-dimensional global magnetospheric simulations using the Geospace configuration of the Space Weather Modeling Framework. We examine the effects of solar wind fluctuations during a substorm event by running the model with four different driving conditions that vary in fluctuation frequency spectrum. We demonstrate that upstream fluctuations intensify the energy exchange at the magnetopause increasing both energy flux into and out of the system. The increased energy input is reflected in ground magnetic indices. Moreover, the fluctuations impact the magnetopause dynamics by regulating the energy exchange between the polar caps and lobes and energy transport within the magnetotail neutral sheet.

中文翻译：

---

太阳风磁场波动对磁层能量学的影响


太阳风通过与磁层顶处的地球空间系统耦合来驱动磁层动力学。虽然上游波动与地磁活动相关，但它们对磁层顶能量转移的影响是一个悬而未决的问题。在本研究中，我们使用空间天气建模框架的 Geospace 配置检查了三维全球磁层模拟。我们通过在波动频谱变化的四种不同驾驶条件下运行模型来检查太阳风波动在子风暴事件期间的影响。我们证明，上游波动加剧了磁层顶处的能量交换，增加了进出系统的能量通量。增加的能量输入反映在接地磁指数中。此外，涨落通过调节极帽和极瓣之间的能量交换以及磁尾中性片内的能量传输来影响磁层顶动力学。