Results 111 to 120 of about 10,563 (231)

Nonlinear Gyrokinetic Simulation of the Magnetosphere‐Ionosphere Feedback Coupling

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract A nonlinear gyrokinetic simulation is applied to the magnetosphere‐ionosphere (M‐I) coupling system to investigate spontaneous growth of auroral structures and electron acceleration self‐consistently. Perturbations of electron density, potential and field‐aligned current in the auroral ionosphere develop through the feedback instability ...
T.‐H. Watanabe, K. Fujita, S. Maeyama
wiley   +1 more source

Modeling the broadband persistent emission of magnetars

, 2010
In this paper, we discuss our first attempts to model the broadband persistent emission of magnetars within a self consistent, physical scenario. We present the predictions of a synthetic model that we calculated with a new Monte Carlo 3-D radiative code.
Nobili, Luciano, Rea, Nanda, Turolla, Roberto, Zane, Silvia   +3 more
core   +1 more source

Coupled Space Weathering: Nanophase Iron Formation by Micrometeoroid Impact and Solar Wind Sputtering

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Understanding the interplay between micrometeoroid impacts and solar wind irradiation is crucial for interpreting lunar surface evolution. Using reactive molecular dynamics simulations and surface binding energy (SBE) analyses, this study investigates the coupled effects of these two dominant space weathering processes on lunar regolith ...
Ziyu Huang, Masatoshi Hirabayashi
wiley   +1 more source

Quantifying adiabatic motion in the outer radiation belt and ring current with invariant matching

Frontiers in Astronomy and Space Sciences
Adiabatic motion is a fundamental reversible process for geomagnetically trapped particle populations, including particles comprising the ring current and radiation belts.
D. E. da Silva, S. R. Elkington, X. Li, M. K. Hudson   +3 more
doaj   +1 more source

Quasi‐Trapped Zebra Stripes: Radial Transport Driven by Dual‐Pulse Electric Fields

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Energetic electron spectra in Earth's inner radiation belt often exhibit regular stripe‐like features, known as “zebra stripes,” which are typically attributed to the drift motion of stably‐trapped electrons disturbed by electric field perturbations.
Ziyang Wang, Ying Liu, Qiugang Zong, Yixin Sun, Hong Zou, Yuguang Ye   +5 more
wiley   +1 more source

Galactic cosmic rays on extrasolar Earth-like planets I. Cosmic ray flux

, 2015
(abridged abstract) Theoretical arguments indicate that close-in terrestial exoplanets may have weak magnetic fields, especially in the case of planets more massive than Earth (super-Earths).
Atri, D., Grenfell, J. L., Grießmeier, J. -M., Stadelmann, A., Tabataba-Vakili, F.   +4 more
core   +6 more sources

Revealing the Mechanisms of Heat Extremes Using an AI Enabled Diagnostic Framework

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Heat extremes have become a major health hazard around the world. Understanding their mechanisms remains a major challenge because the physical drivers interact in a nonlinear way. Here we introduce a globally perturbed reforecast framework driven by the Neural general circulation model (NeuralGCM).
Longzhen Xiang, Ya Wang, Robin T. Clark, Kai Yang, Gang Huang, Xichen Li, Pengfei Lin, Kaiming Hu, Weichen Tao, Xia Qu   +9 more
wiley   +1 more source

A new model for the substorm growth phase [PDF]

, 2014
Thesis (Ph.D.) University of Alaska Fairbanks, 2014.The physics of geomagnetic substorms has been under debate for a long time. In particular, the formation of a thin current sheet (CS) is a central unresolved problem because it provides the magnetotail ...
Hsieh, Min-Shiu, 謝旻秀
core  

A Physics‐Informed Neural Network Approach to the Gannon Storm

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Extreme geomagnetic storms, such as the May 2024 Gannon event, pose significant risks to technological infrastructure, requiring robust forecasting models. Here, we apply Physics‐Informed Neural Networks (PINNs) to the Burton equation to model the storm's ring current dynamics by studying the temporal evolution of the SuperMAG SMR index during
M. Lacal, E. Camporeale, M. Piersanti, G. Consolini   +3 more
wiley   +1 more source

Processes in auroral oval and outer electron radiation belt

Earth, Planets and Space, 2018
We have analyzed the role of auroral processes in the formation of the outer radiation belt, considering that the main part of the auroral oval maps to the outer part of the ring current, instead of the plasma sheet as is commonly postulated.
Elizaveta E. Antonova, Marina V. Stepanova, Pablo S. Moya, Victor A. Pinto, Vadim V. Vovchenko, Ilya L. Ovchinnikov, Nikita V. Sotnikov   +6 more
doaj   +1 more source