Trinh T N G, Scholten O, Buitink S, Ebert U, Hare B M, Krehbiel P R, Leijnse H, Bonardi A, Corstanje A, Falcke H, Huege T, Hörandel J R, Krampah G K, Mitra P, Mulrey K, Nelles A, Pandya H, Rachen J P, Rossetto L, Rutjes C, Ter Veen S, Winchen T
Department of Physics, School of Education Can Tho University Campus II Can Tho Vietnam.
KVI-Center for Advanced Radiation Technology University of Groningen Groningen The Netherlands.
J Geophys Res Atmos. 2020 Apr 27;125(8):e2019JD031433. doi: 10.1029/2019JD031433. Epub 2020 Apr 22.
An analysis is presented of electric fields in thunderclouds using a recently proposed method based on measuring radio emission from extensive air shower events during thunderstorm conditions. This method can be regarded as a tomography of thunderclouds using cosmic rays as probes. The data cover the period from December 2011 till August 2014. We have developed an improved fitting procedure to be able to analyze the data. Our measurements show evidence for the main negative-charge layer near the -10° isotherm. This we have seen for a winter as well as for a summer cloud where multiple events pass through the same cloud and also the vertical component of the electric field could be reconstructed. On the day of measurement of some cosmic-ray events showing evidence for strong fields, no lightning activity was detected within 100 km distance. For the winter events, the top heights were between 5 and 6 km, while in the summer, typical top heights of 9 km were seen. Large horizontal components in excess of 70 kV/m of the electric fields are observed in the middle and top layers.
本文采用一种最近提出的方法，对雷云中的电场进行了分析，该方法基于在雷暴条件下测量广延大气簇射事件的无线电发射。这种方法可以看作是利用宇宙射线作为探针的雷云层析成像。数据涵盖了2011年12月至2014年8月的时间段。我们开发了一种改进的拟合程序，以便能够分析数据。我们的测量结果表明，在-10°等温线附近存在主要的负电荷层。这在冬季云和夏季云中都有观察到，其中多个事件穿过同一云层，并且电场的垂直分量也可以重建。在一些显示强电场证据的宇宙射线事件的测量当天，在100公里范围内未检测到闪电活动。对于冬季事件，顶部高度在5至6公里之间，而在夏季，典型的顶部高度为9公里。在中层和顶层观察到电场水平分量超过70 kV/m的大值。
