Results 91 to 100 of about 91,577 (233)

Direct Radiation Belt Injections and Their Auroral Counterparts

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract We present a case study of a moderate geomagnetic storm, which exhibits an abrupt relativistic enhancement in the heart of the radiation belt accompanied by low‐latitude purple auroral emission. The relativistic enhancement occurs on a timescale of tens of minutes and reaches MeV energies deep within the inner magnetosphere. The enhancement is
K. A. Sorathia, M. Shumko, J. Liang, H. Arnold, G. Sinha, V. G. Merkin, A. Sciola, A. Michael, D. Lin, S. Bao, Y. Pan, J. Garretson, D. Turner, A. Y. Ukhorskiy   +13 more
wiley   +1 more source

Extra Zebra Stripes Observed by Macao Science Satellite‐1 in the Inner Radiation Belt

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract Zebra stripes, characterized by periodic banded structures in the energy‐L shell spectra of energetic electrons in the Earth's inner radiation belt, are understood to result from the azimuthal drift of electrons perturbed by prompt electric field perturbations.
Ziyang Wang, Ying Liu, Qiugang Zong, Yixin Sun, Hong Zou, Yuguang Ye, Xuzhi Zhou   +6 more
wiley   +1 more source

SIMULATION OF RANDOM ERRORS IN IONOSPHERIC PARAMETERS ESTIMATION OBTAINED BY MEANS OF INCOHERENT SCATTERING

Вестник Северо-Кавказского федерального университета, 2022
Algorithm of estimation of random errors in the obtained temperature and ion composition of ionospheric plasma is presented in the paper. The results of simulation based on the developed algorithm are analyzed.
Aleksandr Viktorovich Bogomaz
doaj  

Whistler Chorus Amplification in the Magnetosphere: The Nonlinear Free‐Electron Laser Model and the Ginzburg‐Landau Equation

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract We present a novel nonlinear model for whistler‐mode chorus amplification based on the free‐electron laser (FEL) mechanism. First, we derive the nonlinear collective variable equations for the whistler‐electron interaction. Consistent with in situ satellite observations, these equations predict that a small seed wave can undergo exponential ...
Brandon Bonham, Amitava Bhattacharjee
wiley   +1 more source

Pacific‐to‐Arctic Oceanic Nitrate Fluxes: First Bering Strait Overwinter Nitrate Time‐Series (2022–2023) Show Winter Replenishment and Suggest Decadal Flux Increase

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract The first overwinter (September 2022–July 2023) biogeochemical (nitrate, dissolved oxygen, fluorescence, and turbidity) mooring time‐series from the Bering Strait indicate late summer secondary productivity/ammonification, very minor oxygen consumption in winter, and a spring bloom triggered by sea‐ice retreat.
R. A. Woodgate, C. Peralta‐Ferriz, L. Jensen   +2 more
wiley   +1 more source

Magnetic Field and Plasma Asymmetries Between the Martian Quasi‐Perpendicular and Quasi‐Parallel Magnetosheaths

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract The Martian magnetosheath acts as a conduit for mass and energy transfer between the upstream solar wind and its induced magnetosphere. However, our understanding of its global properties remains limited. Using 9 years of data from NASA's Mars Atmosphere and Volatile EvolutioN mission, we performed a quantitative statistical analysis to ...
Abigail Tadlock, Chuanfei Dong, Chi Zhang, Markus Fränz, Hongyang Zhou, Jiawei Gao   +5 more
wiley   +1 more source

Statistical Analysis of Multiple Bow Shock Crossings at Mars

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract We conduct a statistical analysis of multiple bow shock (BS) crossings at Mars. Data from the magnetometer (MAG) and Solar Wind Ion Analyzer (SWIA) onboard the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft from its first 2 years in orbit is used to identify flapping events.
Niklas J. T. Edberg, David J. Andrews, Long Cheng, Konstantin Kim, Katerina Stergiopoulou, Mark Lester, Cyril Simon Wedlund, Jasper S. Halekas, Shannon M. Curry   +8 more
wiley   +1 more source

“Oxygen starvation” of the atmosphere

Solar-Terrestrial Physics
Since the discovery of the phenomenon of abnormal cooling and sinking of the middle and upper atmosphere in 1993–1998, two concepts have developed which explain its origin by man-made processes.
Givishvili Givi, Leshchenko Liudmila
doaj   +1 more source

Toward Real‐Time Assessment of Infrasound Event Detection Capability Using Deep Learning‐Based Transmission Loss Estimation

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 19, 16 October 2025.
Abstract Accurate modeling of infrasound transmission loss is crucial for assessing the performance of the International Monitoring System, which monitors compliance with the Comprehensive Nuclear‐Test‐Ban Treaty by detecting atmospheric explosions. This modeling supports the design and maintenance of the operating monitoring network.
A. Janela Cameijo, A. Le Pichon, Y. Sklab, S. Arib, Q. Brissaud, S. P. Näsholm, C. Listowski, S. Aknine   +7 more
wiley   +1 more source

Properties of Ion Upflows in the Low‐Altitude Polar Ionosphere During CIR‐ and CME‐ Driven Magnetic Storms Based on Long‐Term EISCAT Observations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract We have investigated the effects of Corotating Interaction Region‐ (CIR‐) and Coronal Mass Ejection‐ (CME‐) driven magnetic storms on the characteristics and mechanisms of ion upflow in the low‐altitude ionosphere (250–350 km). Our analysis was based on observations from the European Incoherent Scatter (EISCAT) radars at Tromsø (ILAT = ∼66 ...
M. Takada, K. Seki, Y. Ogawa, K. Keika
wiley   +1 more source