Electric field at mounting peak during thunderstorms and gamma ray glows

0504203 - ÚFA 2020 DE eng A - Abstrakt
Chum, Jaroslav - Kudela, K. - Langer, R. - Baše, Jiří - Kollárik, M. - Strhársky, I.
Electric field at mounting peak during thunderstorms and gamma ray glows.
Geophysical Research Abstracts. Vol. 21. Göttingen: European Geosciences Union, 2019. EGU2019-3275.
[EGU General Assembly 2019. 07.04.2019-12.04.2019, Vienna]
Institucionální podpora: RVO:68378289
Klíčová slova: thunderstorm * lightning * gamma ray glows
Obor OECD: Meteorology and atmospheric sciences
https://meetingorganizer.copernicus.org/EGU2019/EGU2019-3275.pdf

We show an analysis of simultaneous measurement of potential gradient (PG) at rocky mountain peak (Lomnicky peak, 2634 m, Slovak Republic) and on its slope (observatory of Skalnate Pleso at the altitude of 1780 m), and measurement of secondary cosmic rays – gamma ray glows by the detector system SEVAN (Space Environmental Viewing and Analysis Network) located on Lomnicky peak. Results of observations for summer seasons in 2017 and 2018 are presented. It is shown that a necessary condition for gamma ray glows to occur is a large value of PG at Lomnický peak and/or at Skalnate Pleso. If nearby lightning occurs, gamma ray glow is terminated. It was found that there is much larger probability of gamma ray glow – enhancement of secondary cosmic rays during large negative PG rather than during large positive PG. The PG at Lomnicky peak and PG at Skalnate Pleso are not always well correlated on small time scales. Significant enhancements of gamma ray glows are usually observed when large PG is measured both at Lomnicky peak and at Skalnate Pleso. In general, better correlation between gamma ray glows and high values of PG is for Lomnicky peak, however, examples when PG at Skalnate Pleso plays an important role can also be found.
Trvalý link: http://hdl.handle.net/11104/0295885