Results 81 to 90 of about 22,479 (200)

A New Orthogonal Geomagnetic Coordinate System: The Generalized Eccentric Dipole

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The study of near‐Earth plasma environment relies heavily on accurate geomagnetic coordinate systems, mainly because the plasma motion is controlled by the E×B $\boldsymbol{E}\times \boldsymbol{B}$ drift and thus is constrained by the structure of the magnetic field.
Antoine Resseguier, Pierre‐Louis Blelly, Aurélie Marchaudon   +2 more
wiley   +1 more source

Imprint of the Quasi‐Biennial Oscillation on the Ionosphere and Thermosphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The Quasi‐Biennial Oscillation (QBO) is a dominant mode of stratospheric variability and is known to modulate the variability of the ionosphere‐thermosphere (IT) system. However, the extent of its influence on the ionosphere‐thermosphere system remains uncertain due to weak signals and confounding with similar periodicities in solar flux.
D. Singh, L. P. Goncharenko, S. R. Zhang
wiley   +1 more source

Understanding solar cycle variability

, 2017
The level of solar magnetic activity, as exemplified by the number of sunspots and by energetic events in the corona, varies on a wide range of time scales. Most prominent is the 11-year solar cycle, which is significantly modulated on longer time scales.
Cameron, Robert, Schüssler, Manfred
core   +1 more source

Magnetic Field Induced by Convective Flow in Ganymede's Subsurface Ocean

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract It has been suggested that the convective flows in Ganymede's subsurface ocean can generate a magnetic field that is strong enough to be measured by future space missions. Here, we investigate this hypothesis by developing a numerical model of Ganymede's magnetic field induced by the motion of salt water in its interior.
L. Šachl, J. Kvorka, O. Čadek, J. Velímský   +3 more
wiley   +1 more source

Magnetic Fields in the Solar Convection Zone

Living Reviews in Solar Physics, 2009
Active regions on the solar surface are generally thought to originate from a strong toroidal magnetic field generated by a deep seated solar dynamo mechanism operating at the base of the solar convection zone.
Yuhong Fan
doaj  

Does the butterfly diagram indicate asolar flux-transport dynamo?

, 2004
We address the question whether the properties of the observed latitude-time diagram of sunspot occurence (the butterfly diagram) provide evidence for the operation of a flux-transport dynamo, which explains the migration of the sunspot zones and the ...
D. Schmitt, Ferriz-Mas, Ferriz-Mas, Haber, Hathaway, Hoyng, M. Schüssler, Ossendrijver, Schmitt, Schmitt, Schüssler, Solanki   +11 more
core   +1 more source

Climatology of Plasma Irregularities Using ROTI Index From 2008 to 2023 in East West Asia

Space Weather, Volume 24, Issue 4, April 2026.
Abstract This study investigates characteristics of ionospheric irregularities over the East–West Asian equatorial region using the Rate of TEC Index (ROTI) derived from Global Navigation Satellite System (GNSS) measurements. Data from four stations (GUAM, PIMO, CUSV, and IISC) were analyzed for 2008–2023, covering solar cycle (SC) 24 and the ascending
Pandit Drabindra, Fleury Rolland, Amory‐Mazaudier Christine   +2 more
wiley   +1 more source

Dynamo Confinement of a Radiatively Spreading Solar Tachocline Revealed by Self-consistent Global Simulations

The Astrophysical Journal Letters
The helioseismically observed solar tachocline is a thin internal boundary layer of shear that separates the rigidly rotating solar radiative zone from the differentially rotating convective zone and is believed to play a central role in the 22-yr solar ...
Loren I. Matilsky, Lydia Korre, Nicholas H. Brummell   +2 more
doaj   +1 more source

Quasi-biennial oscillations and Rieger-type periodicities in a Babcock–Leighton solar dynamo

Astronomy & Astrophysics
Context. The Sun’s magnetic field exhibits the 11 year solar cycle as well as shorter periodicities, popularly known as the quasi-biennial oscillations (QBOs) and Rieger-type periods.
Kumar Pawan, Ravindra Belur, Chowdhury Partha, Karak Bidya Binay   +3 more
doaj   +1 more source

Numerical simulations of quiet Sun magnetic fields seeded by Biermann battery

, 2017
The magnetic fields of the quiet Sun cover at any time more than 90\% of its surface and their magnetic energy budget is crucial to explain the thermal structure of the solar atmosphere. One of the possible origins of these fields is due to the action of
Collados, M., de Vicente, A., Khomenko, E., Vitas, N.   +3 more
core   +1 more source