Results 71 to 80 of about 782 (172)

The role of cold oxygen ions in the EMIC wave growth

Journal of Geophysical Research: Space Physics
Abstract Electromagnetic ion cyclotron (EMIC) waves, driven by ring current ion temperature anisotropy in the Earth's magnetosphere, play a key role in accelerating and precipitating relativistic electrons in the radiation belts. Their excitation and saturation are significantly affected by the surrounding cold plasma.
Shujie Gu, Misa Cowee, Xiangrong Fu, Lunjin Chen, Xu Liu, Vania Jordanova   +5 more
openaire   +5 more sources

On the Role of Electron Precipitation in Excess Radiation Doses Measured at Aviation Altitudes

Space Weather, Volume 24, Issue 6, June 2026.
Abstract Radiation from space in the form of galactic cosmic rays (GCRs) generates a persistent background of ionizing radiation in Earth's atmosphere. The dose rate of ionizing radiation due to GCRs increases from sea level to aviation altitudes.
Julia Luna Claxton, Robert Marshall
wiley   +1 more source

Two‐Dimensional Hybrid Simulation of the Second‐Harmonic Generation of EMIC Waves in the Inner Magnetosphere

Geophysical Research Letters
Two‐dimensional (2‐D) hybrid model is developed to investigate the second harmonic (SH) generation of electromagnetic ion cyclotron (EMIC) waves. Applying the singular value decomposition method to simulated fields, we show that the SH exhibits wave ...
Zuxiang Xue, Zhigang Yuan, Xiongdong Yu, Dan Deng   +3 more
doaj   +1 more source

Study of temperature anisotropy and kappa distribution impacts on EMIC waves in multi-species magnetized plasma [PDF]

Annales Geophysicae
This research investigates the impact of temperature anisotropy on electromagnetic ion cyclotron (EMIC) waves in a multi-ion magneto-plasma environment composed of H+, He+, and O+ ions, with a particular emphasis on the role of the kappa distribution ...
R. Bhaisaniya, G. Ahirwar
doaj   +1 more source

Development of Next‐Generation Flood Inundation Maps: A Case Study in Kaohsiung City, Taiwan

Journal of Flood Risk Management, Volume 19, Issue 2, June 2026.
ABSTRACT Flood inundation mapping has become a critical reference for flood risk management, particularly for determining insurance premiums and formulating mitigation strategies in rapidly urbanizing areas with high population density. With recent advancements in mapping technologies and high computing capacity, high‐resolution spatiotemporal datasets
Chih‐Hung Hsu, Jiun‐Huei Jang, Che‐Hao Chang, Wei‐Lin Lee, Chia‐Chen Chien, Po‐Hsien Chung   +5 more
wiley   +1 more source

Analysis of Chorus Wave Power on Burst‐Mode Timescales During the Van Allen Probes Era

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Interactions between whistler‐mode chorus waves and electrons are a key driver of dynamics in Earth's radiation belts. These global dynamics are often described using Fokker‐Planck diffusion models. Whilst, in many cases, such models effectively describe the large scale changes within the region, they often rely upon spatially and temporally ...
R. Black, O. Allanson, N. P. Meredith, A. Hillier, D. P. Hartley   +4 more
wiley   +1 more source

Validation of VERB‐3D Simulation Results in Response to the COSPAR ISWAT Challenge

Space Weather, Volume 24, Issue 5, May 2026.
Abstract In response to the first long‐term simulation challenge issued by the COSPAR International Space Weather Action Team (ISWAT) G3‐04 team (“Internal Charging Effects and the Relevant Space Environment”), we evaluate the performance of the Versatile Electron Radiation Belt‐3D model by simulating the radiation belt electron dynamics for the entire
Xingzhi Lyu, Dedong Wang, Miroslav Hanzelka, Shangchun Teng, Alexander Y. Drozdov, Angelica Castillo, Yuri Y. Shprits   +6 more
wiley   +1 more source

A Fully Connected Neural Network for Fast Estimation of Quasi‐Linear Diffusion Coefficients

Space Weather, Volume 24, Issue 5, May 2026.
Abstract Wave–particle interactions are a fundamental driver of electron radiation belt dynamics. Quantifying their effects through quasi‐linear theory requires diffusion coefficients, but their direct evaluation involves nested integrations and is computationally expensive, limiting their use in real‐time applications.
Mengli Tan, Yifan Wu, Zeyu An, Peng Peng, Xin Tao   +4 more
wiley   +1 more source

Magnetospheric multiscale observations of electromagnetic ion cyclotron waves associated with cold ion heating in the Earth’s magnetosphere

AIP Advances
Electromagnetic ion cyclotron (EMIC) waves play a significant role in shaping the dynamics of Earth’s magnetosphere. On September 13, 2015, EMIC wave activity within the proton band was detected in the inner magnetosphere through observations made by the
A. A. Abid, K. Qamar, Nisar Ahmad, A. Waheed, M. S. Hussain, M. N. S. Qureshi, Amin Esmaeili, B. M. Alotaibi, Ommair Ishaque, Xiaojie Li, Guang-Rui Yao, Yan-Fang Ji   +11 more
doaj   +1 more source

EMIC wave spatial and coherence scales as determined from multipoint Van Allen Probe measurements

Geophysical Research Letters, 2016
Electromagnetic ion cyclotron (EMIC) waves can provide a strong source of energetic electron pitch angle scattering. These waves are often quite localized, thus their spatial extent can have a large effect on their overall scattering efficiency.
L. W. Blum, O. Agapitov, J. W. Bonnell, C. Kletzing, J. Wygant   +4 more
doaj   +1 more source