青藏高原东北部闪电M 变化多参量观测
刊物全称
物理学报
论文作者
武斌,张广庶,王彦辉,李亚珺,范祥鹏,余海,张荣
发表年度
2013
刊物类别
SCI
卷
62
期
189202
影响因子
1.027
通讯作者
Wu, B
请求全文
关键词
Qinghai-Tibet Plateau, M changes, MP changes, K changes
摘要
The M change characteristics in continuing current process of negative cloud-to-ground lightning discharge and artificially triggering lightning discharge are comparatively analyzed using the synchronous data of optical channel high-speed video camera pictures, electric field changes on ground and the peak very high frequency radiation. The results indicate that M process could be identified accurately from synchronous data of optical channel luminance and electric field changes on ground. There are lots of rapid changes of electric field (MP) prior to and during classic M change. And the M changes caused by lots of MP changes. There is mostly no difference in waveform characteristics between M changes and K changes and their generated physical mechanisms are similar. MP change is a rapid change of electric field corresponding to the rapid flow of charge caused by the breakdown process in the stage of continuous current process and accompanied with channel sudden brightening and high intensity radiation. Most of the M changes are unipolar, positive or negative and a few are irregular and last within 0.1 ms. Only M change in close lightning discharge exhibits a classic U-shaped structure because of its waveform mostly caused by static electric field, and its duration is about from 0.2 to 0.8 ms. MP and K changes are all caused by the breakdown. The difference between MP and K changes is that the electric charges flow into the original return stroke channel in the process of MP change, but not in the process of K change.
- 上一条: Rainwater content estimated using polarimetric radar parameters in the Heihe River Basin 2018-10-11
- 下一条: 闪电的分形特征研究及其在自动识别中的应用 2018-10-11
- 青藏高原东北部地区闪电特征初步分析 2018-10-11
- 青藏高原地表感热通量变化特征及其对气候变化的响应 2018-10-11
- 已毕业研究生 2018-10-06
- 多套土壤温湿度资料在青藏高原的适用性 2018-10-11
- 青藏高原深层土壤热通量的变化特征分析 2018-10-11