Analysis of the first positive polarity gigantic jet recorded near the Yellow Sea in mainland China
Analysis of the first positive polarity gigantic jet recorded near the Yellow Sea in mainland China
复制标题
中国大陆黄海附近首次记录的正极性巨喷流分析
DOI：
10.1016/j.jastp.2019.04.015
复制
发表时间：
2019-09
影响因子：
1.9
通讯作者：
Xiushu Qie
中科院分区：
文献类型：
--
作者：
Qijia He;Jing Yang;Gaopeng Lu;Zhixiong Chen;Yu Wang;Mitsuteru Sato;Xiushu Qie
2010年8月12日12：16：22 UTC，在中国黄海附近的雷暴上空记录到一个巨大的急流（GJ）。女川天文台观测到的极低频（ELF）磁场表明，这一GJ事件将正电荷从雷暴云转移到电离层（即+GJ事件），这是中国大陆首次观测到的+GJ事件。据估计，这个GJ的最高高度约为89公里。母雷暴形成于非常潮湿的环境（可降水量为75.4毫米），具有中等对流有效位能（1294 J/kg）和升力指数（−3.19），以及强烈的0-6公里风速切变（16.3 m/s）。气象参数与典型的夏季雷暴相差不大。云顶亮温低于-60 °C（高度14 km以上）的面积在10：00 UTC后明显增加，并在12：00 UTC（GJ前16分钟）达到最大值，表明GJ的发生与雷暴的强烈垂直发展有关。据雷达数据显示，在GJ期间，风暴的南部单体具有过冲顶部。此外，风暴主要由负的云对地（-CG）闪光，在GJ发生的时候，-CG闪光率增加，表明风暴似乎是正常的极性（主要的正电荷区域位于主要的负电荷区域之上）。+ GJ可能是由正常带电的雷暴产生的，并讨论了这种意想不到的行为和不同的闪电活动的GJ产生的风暴的可能解释。
At 12:16:22 UTC on 12 August 2010, a gigantic jet (GJ) was recorded over a thunderstorm near the Yellow Sea in China. The extremely low-frequency (ELF) magnetic field recorded at the Onagawa Observatory indicates that this GJ transferred positive charge from the thundercloud to the ionosphere (namely a +GJ event), which is the first observation of a +GJ reported in mainland China. The top altitude of this GJ was estimated to be about 89 km. The parent thunderstorm formed in a very moist environment (precipitable water of 75.4 mm) with moderate convective available potential energy (1294 J/kg) and lifted index (−3.19), and strong 0–6 km wind speed shear (16.3 m/s). The meteorological parameters are not much different from typical summer thunderstorms. The area of cloud top brightness temperature colder than −60 °C (altitudes above 14 km) increased significantly after 10:00 UTC and reached the maximum at 12:00 UTC (16 min before the GJ), suggesting the occurrence of the GJ was related to the strong vertical development of the thunderstorm. Around the time of the GJ, the south cell of the storm featured overshooting top as indicated by radar data. Additionally, the storm was dominated by negative cloud-to-ground (-CG) flashes with an increase in -CG flash rate around the time of the GJ occurrence, indicating the storm appeared to be of normal polarity (the main positive charge region located above the main negative charge region). The + GJ was probably produced by a normally electrified thunderstorm, and a possible explanation for this unexpected behavior and different lightning activity of GJ-producing storms were discussed.
登录
查看更多内容
DOI：
--
发表时间：
2011-12
期刊：
--
影响因子：
--
作者：
G. Lu;S. Cummer;W. Lyons;P. Krehbiel;Junfei Li;W. Beasley;W. Rison;R. Thomas;H. Edens;M. Stanley;D. MacGorman;O. V. D. Velde;M. Cohen;T. Lang;S. Rutledge
通讯作者：
G. Lu;S. Cummer;W. Lyons;P. Krehbiel;Junfei Li;W. Beasley;W. Rison;R. Thomas;H. Edens;M. Stanley;D. MacGorman;O. V. D. Velde;M. Cohen;T. Lang;S. Rutledge
影响因子：
64.8
作者：
Pasko, VP;Stanley, MA;Wood, TG
通讯作者：
Wood, TG
影响因子：
5.2
作者：
M. Stanley;P. Krehbiel;M. Brook;C. Moore;W. Rison;B. Abrahams
通讯作者：
M. Stanley;P. Krehbiel;M. Brook;C. Moore;W. Rison;B. Abrahams
影响因子：
4.6
作者：
Singh R;Maurya AK;Chanrion O;Neubert T;Cummer SA;Mlynarczyk J;Cohen MB;Siingh D;Kumar S
通讯作者：
Kumar S
影响因子：
5.5
作者：
C. Emersic;C. Saunders
通讯作者：
C. Emersic;C. Saunders