Further evidence for a global correlation of the Earth‐ionosphere cavity resonances
Further evidence for a global correlation of the Earth‐ionosphere cavity resonances
复制标题
地球-电离层空腔共振的全球相关性的进一步证据
DOI：
10.1029/96gl02612
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
A. Fraser
中科院分区：
文献类型：
--
作者：
M. Füllekrug;A. Fraser
斯坦福 ELF/VLF 无线电噪声调查提供了 ELF 范围内的数字时间序列以及全球不同地点的一个水平磁场分量的 VLF 模拟记录。选择三个地点，即南极洲的到达高地、格陵兰岛的桑德斯特罗姆峡湾和加利福尼亚州的斯坦福，来研究地球-电离层空腔共振频率范围内的自然磁噪声（6-60 Hz）。共振被解释为纯共振现象，并且通过使用复指数算法以稳健的方式导出相关参数。在 1990 年 1 月至 4 月的时间间隔内，第一和第二共振的所得振幅表现出明显的日变化和相同数量级的明显日变化。日变化在所有三个不同地点之间密切相关。它们还表现出与太阳自转周期相关的 20-30 天的变化，以太阳黑子数表示。
The Stanford ELF/VLF Radio Noise Survey provides digital time series in the ELF range and VLF analog recordings of one horizontal magnetic field component at different locations around the globe. Three sites, Arrival Heights in Antarctica, Sondrestromfjord in Greenland and Stanford in California, are chosen to investigate the natural magnetic noise in the frequency range of the Earth-ionosphere cavity resonances (6-60 Hz). The resonances are interpreted as pure resonance phenomena and the associated parameters are derived in a robust manner by use of the complex exponential algorithm. The resulting amplitudes of the first and second resonances exhibit a pronounced diurnal variation and a distinct day to day variability of the same order during the time interval from January to April 1990. The day to day variability is well correlated between all of the three different sites. They also exhibit a 20-30 day variation that is related to the solar rotation period, expressed by means of sunspot numbers.