Types of lightning discharges that abruptly terminate enhanced fluxes of energetic radiation and particles observed at ground level
| Autor: | Vladimir A. Rakov, S. Soghomonyan, Y. Khanikyants, Ashot Chilingarian, E. A. Mareev, D. Pokhsraryan |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Atmospheric Science 010504 meteorology & atmospheric sciences Electron Radiation Atmospheric sciences 01 natural sciences Lightning Particle detector Acceleration Geophysics Altitude Space and Planetary Science Electric field 0103 physical sciences Earth and Planetary Sciences (miscellaneous) Wideband 010306 general physics 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geophysical Research: Atmospheres. 122:7582-7599 |
| ISSN: | 2169-8996 2169-897X |
| DOI: | 10.1002/2017jd026744 |
| Popis: | We present ground-based measurements of thunderstorm-related enhancements of fluxes of energetic radiation and particles that are abruptly terminated by lightning discharges. All measurements were performed at an altitude of 3200 m above sea level on Mt. Aragats (Armenia). Lightning signatures were recorded using a wideband electric field measuring system with a useful frequency bandwidth of 50 Hz to 12 MHz and network of five electric field mills, three of which were installed at the Aragats station, one at the Nor Amberd station (12.8 km from Aragats), and one at the Yerevan station (39 km from Aragats). We observed that the flux-enhancement termination was associated only with close (within 10 km or so of the particle detector) -CGs and normal-polarity ICs; that is, with lightning types which reduce the upward-directed electric field below the cloud and, hence, suppress the acceleration of electrons toward the ground. |
| Databáze: | OpenAIRE |
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