Results 41 to 50 of about 22,416 (198)

Reversals of the solar dipole [PDF]

, 2012
During a solar magnetic field reversal the magnetic dipole moment does not vanish, but migrates between poles, in contradiction to the predictions of mean-field dynamo theory. We try to explain this as a consequence of magnetic fluctuations.
Kitchatinov, Leonid L., Moss, David, Sokoloff, Dmitri   +2 more
core   +1 more source

Multimode Representation of the Magnetic Field for the Analysis of the Nonlinear Behavior of Solar Activity as a Driver of Space Weather

Mathematics, 2022
Estimating and predicting space weather is important to the space industry and space missions. The driver of space weather, especially near the Earth, is solar activity, the study of which is an important task.
Elena Popova, Anatoli I. Popov, Roald Sagdeev   +2 more
doaj   +1 more source

Reversals of the solar magnetic dipole in the light of observational data and simple dynamo models

, 2014
Observations show that the photospheric solar magnetic dipole usually does not vanish during the reversal of the solar magnetic field, which occurs in each solar cycle. In contrast, mean-field solar dynamo models predict that the dipole field does become
Hoeksema, J. T., Moss, D., Pipin, V. V., Sokoloff, D. D.   +3 more
core   +1 more source

Light Stability of Laser‐Assisted Glass Encapsulated Perovskite Solar Cells under Different Atmospheres

Advanced Energy Materials, EarlyView.
This study presents a laser‐assisted glass‐frit encapsulation method for perovskite solar cells, comparing air‐, nitrogen‐, and CO2‐filled cavities. Results show that excluding oxygen and moisture significantly improves stability under illumination. The findings reveal the critical role of trapped gases in degradation, providing a pathway to durable ...
Marta Pereira, Jorge Martins, Rúben Madureira, Dzmitry Ivanou, Seyedali Emami, Adélio Mendes   +5 more
wiley   +1 more source

Helioseismic Properties of Dynamo Waves in the Variation of Solar Differential Rotation

The Astrophysical Journal
Solar differential rotation exhibits a prominent feature: its cyclic variations over the solar cycle, referred to as zonal flows or torsional oscillations, are observed throughout the convection zone.
Krishnendu Mandal, Alexander G. Kosovichev, Valery V. Pipin   +2 more
doaj   +1 more source

Modelling variability of solar activity cycles

, 2018
Context. Solar activity cycles vary in amplitude and duration. The variations can be at least partly explained by fluctuations in dynamo parameters. Aims.
Kitchatinov, L. L., Mordvinov, A. V., Nepomnyashchikh, A. A.   +2 more
core   +1 more source

Universal Time Influence on Stormtime Magnetosphere Ionosphere Coupling

AGU Advances, Volume 7, Issue 2, April 2026.
Abstract The offset between Earth's magnetic and rotational axes introduces a diurnal dependence in the high‐latitude EUV exposure of the northern hemisphere (NH) and southern hemisphere (SH). This variation raises the question: Does the Universal Time (UT) of geomagnetic storm onset impact its geospace consequences?
Kalpesh Ghag, William Lotko, Kevin Pham, Dong Lin, Viacheslav Merkin, Anil Raghav, Michael Wiltberger   +6 more
wiley   +1 more source

Observing and modeling the poloidal and toroidal fields of the solar dynamo

, 2017
Context. The solar dynamo consists of a process that converts poloidal field to toroidal field followed by a process which creates new poloidal field from the toroidal field. Aims.
Cameron, R. H., Duvall Jr., T. L, Schunker, H., Schüssler, M.   +3 more
core   +1 more source

Global Impacts of Ultra‐Low‐Frequency Waves: 1. Thermospheric Responses and Traveling Atmospheric Disturbances

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Ultra‐low‐frequency (ULF) waves cause local Thermosphere‐Ionosphere (T‐I) perturbations, but their impacts on the global T‐I system including the generation of Traveling Atmospheric Disturbances (TADs) have never been evaluated. The mechanisms responsible for the TAD generation and propagation, whether through dynamic or thermal process, are ...
Haonan Wu, Wenbin Wang, Xueling Shi, Dong Lin, Michael D. Hartinger, Joseph B. H. Baker, Shibaji Chakraborty   +6 more
wiley   +1 more source

The Origin of Solar Activity in the Tachocline

, 2007
Solar active regions, produced by the emergence of tubes of strong magnetic field in the photosphere, are restricted to within 35 degrees of the solar equator.
Dikpati M., D’Silva S., Kristen Menou, Kyle P. Parfrey, Schussler M., Spiegel E. A., Spruit H. C., Tayler R. J.   +7 more
core   +2 more sources