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Information × Registration Number 0224U031713, 0122U001560 , R & D reports Title Active processes and magnetic fields in the Sun, their impact on climate change popup.stage_title Head Lozytskyi Vsevolod Н., Доктор фізико-математичних наук Registration Date 06-06-2024 Organization Taras Shevchenko National University of Kyiv popup.description2 Based on the study of circular polarization in a wide spectral range of distances (±15 Å) relative to the center of the D3 He I helium line, new evidences have been found that extremely strong magnetic fields in the 105 G range can exist in solar flares. For the region of the seismic source of a large X17/2.4B solar flare, anomalous profiles of secondary peaks of the Stokes parameter V at large distances (up to 10 Å) from the D3 HeI line were detected, which probably indicate a combination of magnetic fields of the specified range with plasma descent with discrete velocities within 200-435 km/sec. According to data on solar activity in the previous 24 solar cycles, the forecast for the current 25th cycle has been refined. It is concluded that the amplitude of the smoothed sunspot numbers in the 25th cycle is expected to be within 150 ± 30 units, that is, this cycle will be slightly stronger than the previous 24th cycle, which had a maximum of 116 units in 2014. The maximum of the 25th cycle is most likely to be from November 2024 to January 2025, while the strongest geophysical effects may be 1-2 years later. An abnormally prolonged decline phase of the 25th cycle, about 10 years, may be a possible sign of the onset of the age minimum. An improved hydrodynamic model of the solar 11-year cycle, the basis of the model is the hypothesis of the emergence of global hydrodynamic plasma flows as a result of the loss of stability of the heterogeneous rotating layer of matter in the convective zone. When building the model, the radial distribution of the momentum of matter according to the data of the standard model of the Sun is taken into account. It is shown that the solutions found describe all global flows observed on the surface of the Sun: constant meridional circulation from the equator to the poles, torsional oscillations, and space-time variations of the meridional flow. Product Description popup.authors Yefimenko Volodymyr М. Ivanova Oleksandra V. Danylevskyi Vasyl O. Kaminskyi Serhii V. Kryvodubskyi Valerii N. Lozytska Nataliia Yo. Yakovkin Ivan I. popup.nrat_date 2024-06-06 Close