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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Diurnal dependence of ELF/VLF hiss and its relation to chorus at L = 2.4
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Diurnal dependence of ELF/VLF hiss and its relation to chorus at L = 2.4

机译：精灵/甚低频嘘及其昼夜的依赖关系关系在L = 2.4合唱

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摘要

We present the observation and analysis of all very low frequency (0.3-10 kHz) chorus and hiss emissions observed at Palmer Station, Antarctica (L = 2.4), from January through October 2003, near the peak of the most recent solar cycle. We classify three separate categories of emissions: chorus occurring without the presence of hiss ("chorus only"), hiss occurring without the presence of chorus ("hiss only"), and chorus and hiss occurring simultaneously ("chorus with hiss"). We find that observed chorus only and chorus with hiss emissions are confined to the dawn sector, below 6 kHz in frequency. Observed hiss only emissions are confined to the dusk sector, below 4 kHz in frequency. We conclude that there are at least two distinct types of hiss observed at Palmer Station: hiss that is observed with chorus in the dawn sector and hiss that is observed without chorus in the dusk sector. The correspondence of dawn chorus with dawn hiss suggests that these two emissions are strongly related to each other, while the frequency spectrum and local time distribution of dusk hiss, coupled with the absence of simultaneous chorus, suggest that dusk hiss may be generated by terrestrial lightning.
机译：我们现在所有的观察和分析非常低的频率(0.3 -10 kHz)合唱和嘶嘶声排放观察到帕默站,南极洲(L = 2.4),从1月到2003年10月,附近最近的太阳活动周期的峰值。三个不同类别的分类排放:合唱发生没有嘶嘶声的存在(“合唱”),嘶嘶声没有发生合唱(“嘘”),和合唱嘶嘶声同时发生(“合唱嘘”)。合唱声都局限在排放到大气中黎明,低于6赫兹的频率。嘶嘶声只局限于黄昏的排放部门,下面4 kHz的频率。至少有两种不同的类型的嘶嘶声观察到帕默站:嘘观察到在黎明合唱部门和嘶嘶声没有观察到合唱的黄昏部门。黎明嘘表明这两个排放彼此紧密相关,而频谱和当地时间的分布黄昏嘶嘶声,加上缺乏同声合唱,表明黄昏嘶嘶声是由地面闪电。

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