Results 31 to 40 of about 570 (182)

Deep learning model of hiss waves in the plasmasphere and plumes and their effects on radiation belt electrons

Frontiers in Astronomy and Space Sciences, 2023
Hiss waves play an important role in removing energetic electrons from Earth’s radiation belts by precipitating them into the upper atmosphere. Compared to plasmaspheric hiss that has been studied extensively, the evolution and effects of plume hiss are ...
Sheng Huang, Wen Li, Qianli Ma, Qianli Ma, Xiao-Chen Shen, Luisa Capannolo, Miroslav Hanzelka, Miroslav Hanzelka, Xiangning Chu, Donglai Ma, Jacob Bortnik, Simon Wing   +11 more
doaj   +1 more source

Internal source of plasmaspheric hiss on Earth

地球与行星物理论评, 2022
Plasmasphere is an upward extension of the ionosphere at low and middle latitudes along the closed magnetic field lines rooted in the Earth, where the trapped whistler-mode waves in the frequency range from tens to thousands of Hertz are named as ...
Zhenpeng Su, Nigang Liu, Zhaoguo He, Zhiyong Wu   +3 more
doaj   +1 more source

SAMI3 Simulations of a Persistent Plasmasphere Plume

Geophysical Research Letters, 2018
The Naval Research Laboratory Sami3 is Also a Model of the Ionosphere (SAMI3) ionosphere/plasmasphere code is used to examine the physics of a long‐lived plasmasphere plume. The May 1994 storm is simulated.
J. Krall, J. D. Huba, J. E. Borovsky
doaj   +1 more source

A new climatological electron density model for supporting space weather services

Journal of Space Weather and Space Climate, 2022
The ionosphere is the ionized part of the Earth’s atmosphere, ranging from about 60 km up to several Earth radii, whereas the upper part above about 1000 km height up to the plasmapause is usually called the plasmasphere.
Hoque Mohammed Mainul, Jakowski Norbert, Prol Fabricio S.   +2 more
doaj   +1 more source

Proposal for an ionosphere/plasmasphere monitoring system

Annales Geophysicae, 1994
Abstract. A space-based satellite system suited for long-term monitoring of the Earth's ionosphere/plasmasphere systems is proposed. The monitoring system consists of a network of radio beacon satellites capable of measuring the ionospheric and plasmaspheric electron content on a continuous base with high time resolution.
Jakowski, N., Bettac, H.-D.
openaire   +8 more sources

Origins of plasmaspheric hiss [PDF]

Journal of Geophysical Research: Space Physics, 2006
Plasmaspheric hiss is an electromagnetic wave emission responsible for electron loss from the radiation belts, particularly in the slot region (2 < L < 3). There are two leading theories for the origin of plasmaspheric hiss: in situ amplification of wave turbulence in space and lightning‐generated whistlers.
Meredith, Nigel P., Horne, Richard B., Clilverd, Mark A., Horsfall, David, Thorne, Richard M., Anderson, Roger R.   +5 more
openaire   +2 more sources

Oxygen Ion Percentage Inferred From the Cutoff Frequencies of Ionospheric ELF Hiss Emissions

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract The lower cutoff frequency of hiss emissions observed in the ionosphere is controlled by local plasma composition and density. This study identifies 6,340 ionospheric hiss wave events based on observations from the China Seismo‐Electromagnetic Satellite (CSES‐01) from 1 August 2018 to 31 July 2020.
Bin He, Wenlong Liu, Jiangzhao Ai, Dianjun Zhang, Zeren Zhima, Theodore E. Sarris, Li Zeng, Zhao Zhang, Dapeng Liu   +8 more
wiley   +1 more source

Generation of plasmaspheric undulations [PDF]

Geophysical Research Letters, 2008
We have modeled the plasmaspheric plume region using the Comprehensive Ring Current model (CRCM) and the Dynamical Global Core Plasma model (DGCPM), for an event that exhibited substantial undulations or ripples as observed by the IMAGE EUV imager during 17 April 2002. We drove the simulated electric field using the Weimer cross polar cap potential. We
N. Buzulukova, M.‐C. Fok, T. E. Moore, D. M. Ober   +3 more
openaire   +1 more source

Long‐Term Trends in the Ionospheric Equivalent Slab Thickness as a Proxy of Climate Change in the Ionosphere

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Global warming warms the lower atmosphere, but cools and contracts the upper atmosphere. These changes also affect the ionosphere, altering the vertical distribution of plasma through changes in the plasma scale height. Here, we use ionospheric equivalent slab thickness (τ) multidecadal time series, derived through observations from co‐located
A. Pignalberi, T. Alberti
wiley   +1 more source

Ensemble modeling of long-term radiation belt dynamics: accounting for variability in radial diffusion

Frontiers in Astronomy and Space Sciences
This study presents ensemble modeling of outer radiation belt dynamics observed by Van Allen Probes throughout 2017 using DREAM3D simulations.
Sang-Yun Lee, Sang-Yun Lee, Weichao Tu, Gregory S. Cunningham, Gregory S. Cunningham, Misa M. Cowee   +5 more
doaj   +1 more source