Meteorological Aspects of Gamma‐Ray Glows in Winter Thunderstorms

Meteorological Aspects of Gamma‐Ray Glows in Winter Thunderstorms
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冬季雷暴中伽马射线发光的气象学方面

DOI:
10.1029/2020gl091910
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发表时间:
2021
影响因子:
5.2
通讯作者:
Tsuchiya H.
Tsuchiya H.
中科院分区:
地球科学1区
文献类型:
--
作者:
Wada Y.;Enoto T.;Kubo M.;Nakazawa K.;Shinoda T.;Yonetoku D.;Sawano T.;Yuasa T.;Ushio T.;Sato Y.;Diniz G. S.;Tsuchiya H.

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在2016年11月至2019年3月的三个冬季期间,在我们位于日本金泽的地基伽马射线监测网络的一个观测点检测到了11次伽马射线辉光。这些事件的分析与观测的X波段雷达网,云高计,disdrometer,和天气监测。所有探测到的辉光都与超过35 dBZ的对流高反射率区域有关,这些区域的高度超过2 km。它们还伴随着大量的谷粒降水。因此,对应于高反射率区域的雷雨云下层中的雹粒子可以形成产生伽马射线辉光的强电场。此外,这些事件进行了比较,有限的样本nondetection的情况下,但没有显着差异的气象条件之间发现检测和nondetection的情况下,在本研究中。
During three winter seasons from November 2016 to March 2019, 11 gamma‐ray glows were detected at a single observation site of our ground‐based gamma‐ray monitoring network in Kanazawa, Japan. These events are analyzed with observations of an X‐band radar network, a ceilometer, a disdrometer, and a weather monitor. All the detected glows were connected to convective high‐reflectivity regions of more than 35 dBZ, developed up to an altitude of >2 km. They were also accompanied by heavy precipitation of graupels. Therefore, graupels in the lower layer of thunderclouds that correspond to high‐reflectivity regions can form strong electric fields producing gamma‐ray glows. Also, these events are compared with a limited sample of nondetection cases, but no significant differences in meteorological conditions were found between detection and nondetection cases in the present study.
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