Search academic texts

Information × Registration Number 0225U004092, (0125U003103) , R & D reports Title Study of Climate Changes in the Lower Ionosphere and Global Thunderstorm Activity Based on ELF and VLF Radio Diagnostics at the Akademik Vernadsky Station and at Spatially Distributed Observation Sites popup.stage_title Дослідження кліматичних змін нижньої іоносфери та глобальної грозової активності за даними ННЧ і ДНЧ радіо діагностики на станції «Академік Вернадський» і у просторово рознесених пунктах спостережень Head Koloskov Oleksandr V., Доктор фізико-математичних наук Registration Date 07-11-2025 Organization Radio Astronomical Institute of the National Academy of Sciences of Ukraine popup.description1 Study of global thunderstorm activity, retrieval of parameters of powerful lightning discharges and the lower ionosphere, as well as investigation of the characteristics of natural electromagnetic fields in the ELF and VLF ranges, based on the processing and analysis of radio diagnostic data obtained at the Ukrainian Antarctic Station “Akademik Vernadsky” and other spatially distributed observation sites. popup.description2 The project's goal is to investigate global thunderstorm activity, retrieve parameters of powerful lightning discharges and the lower ionosphere, and study natural electromagnetic fields in the ELF and VLF ranges. This is based on processing and analyzing radio diagnostic data from the Ukrainian Antarctic Station (UAS) "Akademik Vernadsky" and other spatially distributed sites. We analyzed the interannual, seasonal, and diurnal variations of lower ionosphere parameters and global thunderstorm activity using synchronous observations from the Northern and Southern Hemispheres. A Schumann Resonance (SR) parameter databank was created from UAS measurements (2024–2025) and used to update existing data banks concerning SR variations over the 11-year solar activity cycle. A data bank of radiation characteristics from worldwide power grids and the UAS's ELF electromagnetic environment was established and analyzed. Diurnal, seasonal, and interannual SR parameter variations at the UAS were described and compared with analogous Arctic observations. A methodology was developed for analyzing long-term global changes in thunderstorm activity and lower ionosphere state, and corresponding assessments were performed. The optimal equipment configuration for recording SR signals, ELF bursts, power grid radiation, and the UAS electromagnetic environment was determined by comparing data from induction coil magnetometers (Lemi-112A, Lemi-112E, and Lemi-120). Furthermore, the hardware-software system structure and methodology for recording ELF signals at an autonomous remote station outside Galindez Island, synchronized with the UAS, were formalized, and the methods for processing and analyzing ELF observation data were improved. Product Description popup.authors Galina V. Litvinenko Andrii O. Sopin Volodymyr M. Lisachenko Serhii B. Kashcheiev Liudmyla D. Tokarska Alisa O. Shvets Tamara A. Soina popup.nrat_date 2025-11-07 Close