Results 51 to 60 of about 1,023,827 (208)

Tidal Variability in the Lower Thermosphere: Relative Importance of ENSO, QBO, PJO, MJO, and Lyα

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 20, 28 October 2026.
Abstract Atmospheric tides in the lower thermosphere play an important role in regulating upper‐atmospheric conditions relevant to space weather. However, their spatial and temporal variability remains poorly understood, apart from seasonal variations. Previous studies have shown that tides can be influenced by meteorological and solar conditions. This
Yosuke Yamazaki, Huixin Liu, Kaoru Sato, Dai Koshin, Claudia Stolle   +4 more
wiley   +1 more source

Waldmeier law for sunspot cycles: Statistical significance and implications for dynamo

Solar-Terrestrial Physics
Waldmeier law for the relation between the rise phase duration and amplitude of solar cycles is an indicator for strength of nonlinearity in the solar dynamo.
Kitchatinov Leonid
doaj   +1 more source

Dynamic Evolution of a Storm‐Time “Super‐EPB” Event Over China on the Magnetically Disturbed Night of 01 December 2023

Space Weather, Volume 24, Issue 10, October 2026.
Abstract This paper investigates the dynamic evolution of a storm‐time “Super‐EPB” event over China on 1 December 2023 (Kp ≤ 7, SYM/H ≥ −130 nT) using multi‐instrument observations. Occurring near sunset as the IMF‐Bz abruptly turned southward, with auroral extension to midlatitudes, the “Super‐EPB” extended to 40°N with an apex height of ∼2,460 km ...
Longchang Sun, Jiyao Xu, Wei Yuan, Yajun Zhu, Maosheng He, Wenjie Sun, Guozhu Li, Jiaojiao Zhang, Hong Gao, Aibin Zhang, Weijun Liu, Guojun Wang   +11 more
wiley   +1 more source

Bayesian inference methods for the calibration of stochastic dynamo models

, 2019
In essentially all applied sciences, data-driven modeling heavily relies on a sound calibration of model parameters to measured data for understanding the underlying mechanisms that lead to observed features.
Albert, Carlo, Ulzega, Simone
core   +1 more source

Equatorial F‐Region Responses to the Main Phase of the 10 May 2024 Geomagnetic Storm Over the South American Sector: Observations and Model Simulations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study examines the equatorial ionospheric response over the South American sector during the onset of the extreme 2024 Mother's Day geomagnetic storm, which began at ∼17 UT on 10 May and reached the G5 level. Pronounced disturbances in ionospheric electrodynamics were observed under both daytime and nighttime conditions. Variations in the
A. M. Santos, J. R. Souza, I. S. Batista, M. Bravo, C. G. M. Brum, J. H. A. Sobral, S. S. Chen, R. Sá, L. C. A. Resende, J. Moro, P. R. Jauer, L. da Silva, D. Medeiros, P. A. B. Nogueira, E. A. Kherani, V. F. Andrioli, M. A. Abdu, G. S. Adeniran, R. de Jesus, A. A. Pimenta, G. Yang, F. A. de Souza   +21 more
wiley   +1 more source

Solar dynamo [PDF]

, 2013
No abstract available.
Kosovichev, A. G., Arlt, R., Bonanno, A., Brandenburg, A., Brun, A. S., Busse, F. H., Dikpati, M., Hara, H., Hill, F., Gilman, P. A., Kitiashvili, I. N., Kleeorin, N., Komm, R., Mansour, N. N., Miesch, M., Nordlund, A., Pevtsov, A. A., Pipin, V. V., Rempel, M., Rogachevskii, I., Ruediger, G., Stein, R. F., Sekii, T., Simitev, R., Stenflo, J. O., Thompson, M. J., Ulrich, R. K., Yokoi, N., Yokoyama, T., Wray, A. A., Zhao, J.   +30 more
openaire  

Characterizing the Solar Cycle Variability Using Nonlinear Time Series Analysis at Different Amounts of Dynamo Supercriticality: Solar Dynamo is Not Highly Supercritical

The Astronomical Journal
The solar dynamo is essentially a cyclic process in which the toroidal component of the magnetic field is converted into the poloidal one and vice versa.
Aparup Ghosh, Pawan Kumar, Amrita Prasad, Bidya Binay Karak   +3 more
doaj   +1 more source

Global Three‐Dimensional Simulation of Magnetospheric Dynamics During the Extreme Geomagnetic Storm of 10–11 May 2024

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study presents a high‐resolution three‐dimensional global magnetohydrodynamic (MHD) simulation of the historic geomagnetic storm of 10–11 May 2024, using observational data for the ACE solar wind input. This extreme event was characterized by intense solar wind dynamic pressure (∼50 nPa) and exceptionally strong interplanetary magnetic ...
Kyung Sun Park
wiley   +1 more source

The 11-Year Magnetic Solar Cycle: Chaos Control Due to Jupiter

, 2022
The observed magnetic field of the Sun is believed to originate from a “dynamo-effect” in its convective surface layer. However, there is no natural 11-year timescale in such models.
Hansson, Johan,
core   +1 more source

Coupled Thermosphere–Ionosphere–Plasmasphere Disturbances During the April 2023 Geomagnetic Storm: A Ground‐Based Multiparametric Study Across the American and European Sectors

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The April 2023 geomagnetic storm significantly impacted the thermosphere‐ionosphere system, particularly over South America and midlatitude regions. This study analyzes ground‐based geomagnetic and ionospheric data, alongside Swarm satellite measurements, to investigate the physical mechanisms driven by intense solar wind energy input ...
L. Perrone, M. Regi, G. Carnevale, C. Scotto, D. Sabbagh, A. Ippolito, A. Del Corpo, D. Sciarra, B. Heilig   +8 more
wiley   +1 more source