Results 31 to 40 of about 178 (93)
Initial evaluation of the hourly winds from WACCM-NEDAS data assimilation using multiple datasets
Earth and Planetary PhysicsCharacterizing hourly wind variability in the mesosphere and lower thermosphere (MLT) remains challenging because direct observations are sparse and observational constraints on gridded products weaken rapidly toward the mesopause.
DiNi Gong +7 more
doaj +1 more source
A Reduced Dimensional Emulator for Forecasting Equatorial Spread F
Space Weather, Volume 24, Issue 6, June 2026.Abstract A machine learning emulator has been developed to efficiently reproduce electron densities from a three‐dimensional, data‐driven, regional simulation of postsunset ionospheric irregularities associated with equatorial spread F (ESF). The simulation has previously been shown to produce accurate ESF conditions observed at the Jicamarca Radio ...
A. Kirchman, D. L. Hysell, S. Palacios
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract The vertical shear of horizontal neutral winds plays an important role in forming dense metallic layers in the E region. Previous studies suggest that metal ion layers may inhibit equatorial plasma bubble (EPB) development by enhancing E‐region Pedersen conductivity.
Minjing Li +3 more
wiley +1 more source
On the Formation of the E Region Layers at Low Altitudes—Theory
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract An analysis of E region ion layer formation is presented, including the effects of a non‐dipole geomagnetic field and gravity on vertical ion drifts, with a particular focus on E region layers at lower altitudes (ELLAs). For nonzero magnetic declination, meridional winds can have an effect similar to those of zonal winds.
E. Nossa +3 more
wiley +1 more source
SAMI3 data in netCDF format (2019-Apr-14)
, 2023 SAMI3 (Sami3 is Also a Model of the Ionosphere) is a seamless, three-dimensional, physics-based model of the ionosphere (Huba et al, 2008). It is based on SAMI2, a two-dimensional model of the ionosphere (Huba et al., 2000).
Huba, Joseph +2 more
core +1 more source
Space Weather, Volume 24, Issue 5, May 2026.Abstract This study evaluates 17 ionospheric models' performance over the Continental United States (CONUS) during the 2024 Mother's Day geomagnetic storm, using ground‐based GNSS Total Electron Content (TEC) and single‐frequency (SF) precise Single Point Positioning (SPP) technique. The storm produced significant positive storm effects during its main
Min‐Yang Chou +15 more
wiley +1 more source
Multi‐Decadal Trends in the Low Latitude foF2 Driven by Secular Magnetic Variations
Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract Long‐term ionospheric trends have been widely studied, but their origin and magnitude remain subjects of debate. This study quantifies the linear trend in the F2‐region critical frequency (foF2) and its local time dependence using observations from eight low‐latitude ionosonde stations.
D. Singh +4 more
wiley +1 more source
SAMI3 data in netCDF format (2019-Mar-27)
, 2023 SAMI3 (Sami3 is Also a Model of the Ionosphere) is a seamless, three-dimensional, physics-based model of the ionosphere (Huba et al, 2008). It is based on SAMI2, a two-dimensional model of the ionosphere (Huba et al., 2000).
Huba, Joseph +2 more
core +1 more source
Space Weather, Volume 24, Issue 4, April 2026.Abstract Storm‐time equatorial plasma bubble (EPB) dynamics play a critical role in space weather impacts on communication and navigation systems, yet the mechanisms governing their formation and evolution under storm conditions remain poorly understood.
Shasha Zou +6 more
wiley +1 more source
SAMI3 data in netCDF format (2019-Mar-02)
, 2023 SAMI3 (Sami3 is Also a Model of the Ionosphere) is a seamless, three-dimensional, physics-based model of the ionosphere (Huba et al, 2008). It is based on SAMI2, a two-dimensional model of the ionosphere (Huba et al., 2000).
Huba, Joseph +2 more
core +1 more source