Results 61 to 70 of about 1,036 (175)
Constraining the outer boundary condition for the Babcock-Leighton dynamo models
Astronomy & AstrophysicsContext. The evolution of the Sun’s large-scale surface magnetic field is well captured by surface flux transport models, which can therefore provide a natural constraint on the outer boundary condition (BC) of Babcock–Leighton (BL) dynamo models.
Luo Yukun +4 more
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Atmospheric Tides Imprint a Wavenumber‐4 Structure in Topside Ionospheric ELF Wave Intensity
Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.Abstract Atmospheric tides produce a well known pronounced longitudinal wavenumber‐4 (WN‐4) structure in the ionosphere, but their influence on electromagnetic‐wave propagation through the ionosphere remains poorly constrained. Here we use DEMETER satellite measurements to show that the extremely low frequency (ELF) electric field in the low‐latitude ...
Li Liao +4 more
wiley +1 more source
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 +6 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
Quasi-biennial oscillations and Rieger-type periodicities in a Babcock–Leighton solar dynamo
Astronomy & AstrophysicsContext. 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 +3 more
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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 +8 more
wiley +1 more source
The Astrophysical Journal LettersThe 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 +2 more
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A Synchronized Two-Dimensional α-Ω Model of the Solar Dynamo. [PDF]
Sol Phys, 2023 Klevs M, Stefani F, Jouve L.
europepmc +1 more source
Frontiers in Astronomy and Space Sciences, 2018 We present a three-dimensional numerical model for the generation and evolution of the magnetic field in the solar convection zone, in which sunspots are produced and contribute to the cyclic reversal of the large-scale magnetic field. We then assess the
Rohit Kumar +3 more
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Investigating Variations in Solar Differential Rotation by Helioseismology
The Astrophysical JournalHelioseismic signatures of dynamo waves have recently been discovered in variations of the solar differential rotation, offering valuable insights into the type of dynamo mechanism operating in the solar convection zone. To characterize these variations,
Krishnendu Mandal +3 more
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