...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Global occurrence rate of elves and ionospheric heating due to cloud-to-ground lightning
【24h】

Global occurrence rate of elves and ionospheric heating due to cloud-to-ground lightning

机译：全球发生的精灵和电离层由于地闪电加热

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present ground-based observations of elves made using an optical free-running photometer along with VLF/LF observations of the lightning electromagnetic pulse (EMP) magnetic field. We use these experimental observations to investigate the properties of the lightning return stroke that control the production of optical elve emissions. Two summers of data containing observations of over 600 elves along with the LF magnetic field of the associated lightning are analyzed. By training a classifier on features of the EMP ground wave, we find that we are able to accurately predict whether or not a stroke produced an elve. We find that the peak current of the causative discharge predicts elve production with 90% accuracy. Further, we find that the production probability of elves as a function of peak current fits a linear regression, with a 50% elve probability for peak currents of 88 kA. We use this finding along with global data from the GLD360 lightning geolocation network to extrapolate the global elve production rate; we show that ～0.8% of all cloud-to-ground lightning discharges produce elves. Finally, using GLD360 data and a numerical model of the lightning EMP, we estimate the total amount of ionospheric heating due to lightning, amounting to approximately 2 MW of continuous power dissipated globally in the lower ionosphere.
机译：我们提出地面观测的精灵使用光学不同步的光度计甚低频/低频观测的闪电电磁脉冲(EMP)磁场。使用这些实验观察研究闪电的属性控制生产的回击光精灵排放。包含观测超过600个精灵的低频磁场有关分析了闪电。在地面电磁脉冲波的特性,我们发现我们能够准确地预测是否中风了精灵。当前的诱发放电预测精灵生产有90%的准确度。生产概率的精灵峰值电流符合线性的函数回归,精灵概率峰值50%88 kA的电流。全球GLD360闪电定位数据网络推断全球精灵生产率;闪电放电产生的精灵。使用GLD360数据的数值模型闪电电磁脉冲,我们估计的总量电离层加热由于闪电,占大约2兆瓦的持续力量全球低电离层消散。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号