Altitude x Amplitude Relations on Negative Leaders Produced by Lightning Data Acquired by LOFAR
Abstract
Lightning generates both positive and negative leaders, which behave differently both in time and spatial development. Such negative leaders are a cascade of generated pulses, electromagnetic radiation emission sources which are detected by specific radio arrays such as the Low-Frequency Array (LOFAR). It's antennas operate over the 30-80 MHz and 120-240 MHz bands, optimal for detecting such negative sources. This data is treated at ASTRON facilities and made available through online databases. Using a set of algorithms, we are able to treat this data in order to map the temporal and spatial position of such pulses, as well as gather other useful data such as their amplitude. We also perform a brief efficiency analysis of the used mapping algorithm, by comparing it to such lightning raw data to guarantee data reliability. Previously mapped data from a 2017 lightning contains useful information that indicated specific behaviors of such pulses' amplitudes, such as a power-law distribution and a possible altitude x amplitude relation which are carefully investigated. These are hereby examined and compared to two lightning flashes from 2018 to ensure such phenomena is ordinary of negative leaders, and it may have no dependent of specific conditions.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2020
- Bibcode:
- 2020AGUFMAE0010007M
- Keywords:
-
- 3304 Atmospheric electricity;
- ATMOSPHERIC PROCESSES