Investigation of quasi-periodic fluctuations in auroral phenomena using EISCAT radar and Cluster satellite data

磁层和电离层之间的耦合是通过磁场变化及其相关电流来介导的。尽管经过几十年的研究，这一过程的重要部分仍然不为人所知。这种耦合的一个令人印象深刻的迹象是可见的极光及其从几秒到几分钟的时间尺度变化。在斯堪的纳维亚北部和斯瓦尔巴特群岛最近现代化的EISCAT（欧洲非相干散射科学协会）雷达的帮助下，可以测量电子密度，电子温度，离子温度和离子漂移速度，具有高的时间和空间分辨率，极光活动期间的各种周期性将被仔细研究，看看它们是否可以用场线共振或其他理论来解释。来自星团卫星使命和其他卫星以及来自地面IMAGE磁强计链和其他地面设施的磁场和电场波动数据将是这项研究的一个重要部分。这里研究的极光和极冠现象对高层大气的能量输入效应应能为束建议的其他项目，特别是Lühr、Jakowski、Jacobi和Kallenrode的建议提供宝贵的投入。

The coupling between the magnetosphere and ionosphere is mediated through magnetic field changes and their associated currents. In spite of several decades of research, important parts of this process are still not understood. An impressive sign of this coupling is the visible aurora and its variations on timescales from seconds to many minutes. With the help of the recently modernised EISCAT (European Incoherent SCATter Scientific Association) radars in north Scandinavia and Svalbard, which can measure electron density, electron temperature, ion temperature and ion drift velocity with high time and spatial resolution, various periodicities during auroral activity will be closely studied to see whether they can be explained by field-line resonances or some other theory. Magnetic and electric field fluctuation data from the Cluster satellite mission and other satellites as well as from the ground-based IMAGE magnetometer chain and other ground-based facilities will be an important part of this study. The effect of energy input to the upper atmosphere from the auroral and polar cap phenomena studied here should provide valuable input to the other projects of the bundle proposal, in particular to the proposals of Lühr, Jakowski, Jacobi and Kallenrode.