Results 51 to 60 of about 25,373 (175)

Quiet Time Ionosphere‐Thermosphere Predictability During Sudden Stratospheric Warmings in TIE‐GCM

Space Weather, Volume 24, Issue 11, November 2026.
Abstract We investigate the predictability of the ionosphere‐thermosphere (IT) region during sudden stratospheric warmings (SSWs) by using subseasonal hindcasts in the Community Earth System Model, version 2 with the Whole Atmosphere Community Climate Model (CESM2 [WACCM6]) to force the lower boundary of the TIE‐GCM.
B. C. Martinez, N. M. Pedatella, Xian Lu
wiley   +1 more source

Long‐Term Increase in Equatorial Rayleigh‐Taylor Instability: Synergistic Effects of Greenhouse Gas Cooling and Geomagnetic Field Secular Variation

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Equatorial plasma bubbles (EPBs) are ionospheric irregularities generated by Rayleigh–Taylor instability (RTI) that disrupt satellite communications. We quantify secular change of RTI growth rates and isolate underlying drivers using WACCM‐X simulations.
Liying Qian, Chih‐Ting Hsu, Wenbin Wang, Shun‐Rong Zhang, Joseph McInerney   +4 more
wiley   +1 more source

No-z Model for Magnetic Fields of Different Astrophysical Objects and Stability of the Solutions

Data, 2021
A wide range of astrophysical objects, such as the Sun, galaxies, stars, planets, accretion discs etc., have large-scale magnetic fields. Their generation is often based on the dynamo mechanism, which is connected with joint action of the alpha-effect ...
Evgeny Mikhailov, Daniela Boneva, Maria Pashentseva   +2 more
doaj   +1 more source

The Long‐Term Trend of the Equatorial Electrojet Over Indian Sector

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The upper‐atmosphere cooling trend is well documented, while the long‐term trend of the ionospheric electrodynamics remains poorly understood. Using two geomagnetic observation data sets over Indian sector, we analyze the long‐term trend of the monthly‐median equatorial electrojet (EEJ) in 1967–2015 after removing the solar activity and ...
Ruilong Zhang, Xu Zhou, Yuzhou Wang, Libo Liu, Yiding Chen, Huijun Le   +5 more
wiley   +1 more source

Triadic resonances in nonlinear simulations of a fluid flow in a precessing cylinder

New Journal of Physics, 2015
We present results from three-dimensional nonlinear hydrodynamic simulations of a precession driven flow in cylindrical geometry. The simulations are motivated by a dynamo experiment currently under development at Helmholtz-Zentrum Dresden-Rossendorf in ...
André Giesecke, Thomas Albrecht, Thomas Gundrum, Johann Herault, Frank Stefani   +4 more
doaj   +1 more source

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

Doppler images and the underlying dynamo [PDF]

, 2015
Context. The (Zeeman-)Doppler imaging studies of solar-type stars very often reveal large high-latitude spots. This also includes F stars that possess relatively shallow convection zones, indicating that the dynamo operating in these stars differs from ...
S. C. Marsden, M. Küker, Waite, I. A., I. V. Ilyin, Strassmeier, K. G., Jarvinen, S. P., T. Hackman, Kuker, M., I. A. Waite, Hackman, T., K. G. Strassmeier, Ilyin, I. V., S. P. Järvinen, Arlt, R., Marsden, S. C., Berdyugina, S. V., R. Arlt, S. V. Berdyugina   +17 more
core   +1 more source

Dynamo Dee

, 2021
Dynamo Dee ...

core   +1 more source

Rates of Geomagnetic Field Change During Excursions and Reversals

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract The Earth's magnetic field is characterized by complex changes, reflecting various geodynamo processes. Paleomagnetic studies have provided evidence of geomagnetic polarity reversals and excursions throughout Earth's history. We use data‐based paleomagnetic field models (LSMOD.2, GGFSS70, and GGFMB) and the axial dipole moment reconstruction ...
Sunaina Shinu, Ahmed Nasser Mahgoub, Monika Korte   +2 more
wiley   +1 more source

Thermal Conductivity of Iron at the Conditions of Small Planetary Cores

Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.
Abstract Planetary interiors cool and evolve over geologic time, and their thermal evolution depends on heat transport through their constituent layers. Here, the thermal conductivity of iron has been measured between 19 and 65 GPa and between 1700 and 2500 K in order to constrain its value at the conditions of small planetary cores.
Eric Edmund, Zachary M. Geballe, Attilio Rivoldini, Nicola Tosi, Stella Chariton, Vitali B. Prakapenka, Alexander F. Goncharov   +6 more
wiley   +1 more source