AI 中文总结
研究地磁暴后等离子层再填充阶段问题，通过模拟结果进行多元回归，发现场向电子温度梯度大小及初始/边界温度调节再填充两阶段时长，解释了部分再填充事件观测中呈现单阶段的原因。
AI 中文摘要
在地磁暴侵蚀等离子层后，冷电离层等离子体沿磁力线流动以重新填充耗尽的通量管。先前研究表明再填充经历两个阶段，具有不同的再填充速率；然而，并非所有观测或模型都呈现此特征，近期分析表明只有部分再填充事件呈现两个清晰阶段。本研究表明，场向电子温度梯度的大小以及初始/边界温度调节早期和晚期阶段的持续时间。通过对早期和晚期再填充模拟结果进行多元回归表明，每个阶段的时长唯一地取决于温度梯度和初始/边界温度。这些结果表明温度剖面的变化可能解释了为何某些再填充事件在观测中看似是单阶段的。
英文摘要
After geomagnetic storms erode the plasmasphere, cold ionospheric plasma flows along magnetic field lines to refill the depleted flux tubes. Previous studies have suggested that refilling undergoes two stages characterized by their distinct refilling rates; however, not all observations or models exhibit this feature, and a recent analysis indicates that only a subset of refilling events display two clear stages. In this study, we show that the magnitude of the field-aligned electron temperature gradient and initial/boundary temperature regulate the durations of both the early and late stages. Performing multivariate regressions from the results of simulating early and late-time refilling demonstrated that the length of each stage uniquely depends on the temperature gradient and initial/boundary temperature. These results suggest that variations in the temperature profile may explain why some refilling events appear single-staged in observations.
CommentsSubmitted to Geophysical Research Letters (GRL)
