Thunderstorm electric fields probed by extensive air showers through their polarized radio emission
Thunderstorm electric fields probed by extensive air showers through their polarized radio emission
复制标题
大量空气阵雨通过其极化无线电发射探测雷暴电场
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
T. Winchen
中科院分区：
文献类型：
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作者：
T. Trinh;O. Scholten;A. Bonardi;S. Buitink;A. Corstanje;U. Ebert;J. Enriquez;H. Falcke;J. Horandel;B. Hare;P. Mitra;K. Mulrey;A. Nelles;J. Rachen;L. Rossetto;C. Rutjes;P. Schellart;S. Thoudam;S. Veen;T. Winchen
我们观察到在雷暴期间记录的大面积空气阵雨的无线电发射中有很大一部分圆极化，远高于在晴朗天气情况下测量的空气阵雨的发射。我们表明，在雷暴期间测量到的空气阵雨的圆极化可以用大气电场引起的横向电流方向随高度的变化来解释。因此，通过使用这些事件的全套Stokes参数，我们可以很好地表征雷雨云中的电场。在我们分析的两个事件中，我们还测量了电场的一个很大的水平分量。
We observe a large fraction of circular polarization in radio emission from extensive air showers recorded during thunderstorms, much higher than in the emission from air showers measured during fair-weather circumstances. We show that the circular polarization of the air showers measured during thunderstorms can be explained by the change in the direction of the transverse current as a function of altitude induced by atmospheric electric fields. Thus by using the full set of Stokes parameters for these events, we obtain a good characterization of the electric fields in thunderclouds. We also measure a large horizontal component of the electric fields in the two events that we have analyzed.