First Results From Sonification and Exploratory Citizen Science of Magnetospheric ULF Waves: Long-Lasting Decreasing-Frequency Poloidal Field Line Resonances Following Geomagnetic Storms
First Results From Sonification and Exploratory Citizen Science of Magnetospheric ULF Waves: Long-Lasting Decreasing-Frequency Poloidal Field Line Resonances Following Geomagnetic Storms
复制标题
磁层 ULF 波的声化和探索性公民科学的初步结果：地磁风暴后的长期频率递减的极向场线共振
DOI：
10.1029/2018sw001988
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发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Archer M
中科院分区：
文献类型：
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作者：
Archer M
磁层超低频（ULF）波有助于太阳风-磁层-电离层系统中的空间天气。然而，通过空间和地面仪器对这些波进行监测会产生大量数据，这些数据很难有效地导航，挖掘和分析。我们目前的sonification，振荡的时间序列转换成可听声音的过程，和公民科学，其中公众成员有助于科学调查，作为一种手段，以潜在地帮助解决这些问题。作为探索性项目的一部分，对地球静止轨道超低频范围的磁强计数据进行了声波处理，并向伦敦高中发布。虽然与典型的公民科学项目相比，这种方法降低了任何特定公民科学家群体获得有用结果的总体可能性，但它促进了所有参与者的独立学习和解决问题，并可能导致少量意想不到的研究成果。我们提出了一个这样的例子，一组学生在多天内发现在日冕物质抛射驱动的地磁暴的恢复阶段发生的频率递减的极向场线共振的案例研究。同步等离子体密度测量表明，频率的下降是由于风暴后等离子体的重新填充。这些波很可能是由内部等离子体过程产生的。对音频的进一步探索揭示了其他大风暴之后的许多类似事件;因此，它们比以前认为的要普遍得多。因此，我们强调了超低频波研究所面临的一些挑战，在解决的潜力声化和探索性的公民科学。
Magnetospheric ultralow‐frequency (ULF) waves contribute to space weather in the solar wind‐magnetosphere‐ionosphere system. The monitoring of these waves by space‐ and ground‐based instruments, however, producesbig data, which are difficult to navigate, mine, and analyze effectively. We present sonification, the process of converting an oscillatory time series into audible sound, and citizen science, where members of the public contribute to scientific investigations, as a means to potentially help tackle these issues. Magnetometer data in the ULF range at geostationary orbit have been sonified and released to London high schools as part of exploratory projects. While this approach reduces the overall likelihood of useful results from any particular group of citizen scientists compared to typical citizen science projects, it promotes independent learning and problem solving by all participants and can result in a small number of unexpected research outcomes. We present one such example, a case study identified by a group of students of decreasing‐frequency poloidal field line resonances over multiple days found to occur during the recovery phase of a coronal mass ejection‐driven geomagnetic storm. Simultaneous plasma density measurements show that the decreasing frequencies were due to the refilling of the plasmasphere following the storm. The waves were likely generated by internal plasma processes. Further exploration of the audio revealed many similar events following other major storms; thus, they are much more common than previously thought. We therefore highlight the potential of sonification and exploratory citizen science in addressing some of the challenges facing ULF wave research.