Results 31 to 40 of about 3,487 (215)

SIMULATION STUDY OF HEMISPHERIC PHASE-ASYMMETRY IN THE SOLAR CYCLE [PDF]

, 2017
Observations of the Sun suggest that solar activities systematically create north–south hemispheric asymmetries. For instance, the hemisphere in which sunspot activity is more active tends to switch after the early half of each solar cycle.
Kusano, K., Shukuya, D.
core   +1 more source

The Drag of Ionosphere Plasma Drifts on Thermospheric Zonal Winds During the 10–12 May 2024 Superstorm

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The observations from GRACE‐FO and DMSP satellites are utilized to analyze the ion‐neutral interaction near dusk during the 10–12 May 2024 super‐storm. The horizontal plasma convection dragged the anti‐sunward wind in the polar cap and sunward winds around the auroral and subauroral regions during whole storm times.
Ruilong Zhang, Libo Liu, Wenbo Li, Rongjin Du, Yuzhou Wang, Yiding Chen, Huijun Le   +6 more
wiley   +1 more source

An update of Leighton’s solar dynamo model [PDF]

Astronomy & Astrophysics, 2017
A&A ...
Cameron, R., Schüssler, M.
openaire   +3 more sources

On energetics and inertial-range scaling laws of two-dimensional magnetohydrodynamic turbulence

, 2012
L. Blackbourn was supported by an EPSRC post-graduate studentship.We study two-dimensional magnetohydrodynamic turbulence, with an emphasis on its energetics and inertial range scaling laws.
Tran, Chuong Van, Blackbourn, Luke Austen Kazimierz   +1 more
core   +1 more source

Transition from axi- to nonaxisymmetric dynamo modes in spherical convection models of solar-like stars [PDF]

, 2018
Context. Both dynamo theory and observations of stellar large-scale magnetic fields suggest a change from nearly axisymmetric configurations at solar rotation rates to nonaxisymmetric configurations for rapid rotation. Aims.
Cole-Kodikara, E., J. J. Lehtinen, Brandenburg, Axel,, Olspert, N., Lehtinen, J. J.,, Viviani, Mariangela, Lehtinen, Jyri J., Lehtinen, J. J., Warnecke, J., M. Viviani, Käpylä, P. J., Viviani, M.,, Käpylä, M., Warnecke, J.,, Käpylä, Petri J.,, Olspert, Nigul, Cole-Kodikara, E. M., Kaepylae, P. J.,, Lehtinen, J., M. J. Käpylä, Cole-Kodikara, Elizabeth M., Käpylä, Maarit J., Brandenburg, A., Cole-Kodikara, E. M.,, A. Brandenburg, Viviani, M., Olspert, N.,, E. M. Cole-Kodikara, Käpylä, P., Käpylä, P. J.,, Brandenburg, Axel, P. J. Käpylä, Käpylä, Petri J., Warnecke, Jörn, Käpylä, M. J., J. Warnecke, N. Olspert   +36 more
core   +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

Physics‐Informed Neural Networks for Modeling the Martian Induced Magnetosphere

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Understanding the magnetic field environment around Mars and its response to upstream solar wind conditions provide key insights into the processes driving atmospheric ion escape. To date, global models of Martian induced magnetosphere have been exclusively physics‐based, relying on computationally intensive simulations. For the first time, we
Jiawei Gao, Chuanfei Dong, Chi Zhang, Yilan Qin, Simin Shekarpaz, Xinmin Li, Liang Wang, Hongyang Zhou, Abigail Tadlock   +8 more
wiley   +1 more source

Rotational dependence of turbulent transport coefficients in global convective dynamo simulations of solar-like stars

, 2020
| openaire: EC/H2020/818665/EU//UniSDynContext. For moderate and slow rotation, the magnetic activity of solar-like stars is observed to strongly depend on rotation, while for rapid rotation, only a very weak or no dependency is detected.
M. J. Käpylä, Käpylä, M., Warnecke, J., Käpylä, M. J., J. Warnecke   +4 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

Gravity Wave Activity in the Stratosphere and Mesosphere During Hurricane Sam

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Multi‐instrument observations of gravity wave (GW) activity during Hurricane Sam (2021) were made using AIRS (Atmospheric Infrared Sounder) satellite data, ERA5 reanalysis, and TIMED/SABER temperature profiles. Two GW extraction methods, vertical high‐pass filtering and empirical mode decomposition, were applied to quantify wave‐induced ...
Ayden L. S. Gann, Erdal Yiğit
wiley   +1 more source