Results 41 to 50 of about 7,987 (248)
Neutral Wind Dynamics in High‐Latitude Regions During the 17 March 2013 Storm
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract Neutral winds play a critical role in transporting mass, momentum, and energy throughout the upper atmosphere. During geomagnetic storms, momentum is transferred to the thermosphere primarily through ion–neutral collisions, along with other forces. This study investigates high‐latitude neutral wind dynamics during the 17 March 2013 storm using
A. Alhothali +2 more
wiley +1 more source
Reduced Order Probabilistic Emulation for Physics‐Based Thermosphere Models
Space Weather, 2023 The geospace environment is volatile and highly driven. Space weather has effects on Earth's magnetosphere that cause a dynamic and enigmatic response in the thermosphere, particularly on the evolution of neutral mass density.
Richard J. Licata, Piyush M. Mehta
doaj +1 more source
Impact of the lower thermospheric winter‐to‐summer residual circulation on thermospheric composition [PDF]
Geophysical Research Letters, 2017 AbstractGravity wave forcing near the mesopause drives a summer‐to‐winter residual circulation in the mesosphere and a reversed, lower thermospheric winter‐to‐summer residual circulation. We conducted modeling studies to investigate how this lower thermospheric residual circulation impacts thermospheric composition (O/N2).
Liying Qian, Jia Yue
openaire +1 more source
Discovering the extent of terrestrial atmospheres: Mapping hydrogen and atomic oxygen in the thermosphere and exosphere [PDF]
, 2023 Clayton Cantrall, L. J. Paxton
openalex +1 more source
Earth and Space Science, Volume 13, Issue 8, August 2026.Abstract This study presents the migrating and nonmigrating thermospheric neutral mass density tides from the Gravity Recovery And Climate Experiment Follow‐On (GRACE‐FO) observations under solar minimum conditions (year 2020). The observed densities are first mapped to a reference altitude of 500 km using an empirical model (NRLMSIS 2.0) to remove the
Mukta Neogi, Jens Oberheide
wiley +1 more source
What to Do When the F10.7 Goes Out?
Space Weather, 2023 The solar radio flux at 10.7 cm, known as F10.7, is a critical operational space weather index. However, without a clear backup, any interruption to the service can result in substantial errors in model outputs.
Sean Elvidge +3 more
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract Solar eclipses offer natural experiments to isolate the photochemical response of mesospheric ozone to solar radiation. Using the WACCM‐X model, we performed mechanism‐oriented sensitivity experiments for the 14 December 2020 eclipse to quantify the tertiary‐ozone‐maximum‐like (TOM‐like) response.
T. Yang +5 more
wiley +1 more source
Atmospheric and Ionospheric Responses to Hunga‐Tonga Volcano Eruption Simulated by WACCM‐X
Geophysical Research Letters, 2023 High‐resolution Whole Atmosphere Community Climate Model with thermosphere/ionosphere extension is used to simulate the responses to the Hunga‐Tonga volcano eruption on 15 January 2022.
H.‐L. Liu +4 more
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract The present study reports on the variability of the post‐midnight ionosphere over the low‐latitude sector during the recovery phases of the May and October 2024 storms. Multi‐instrument observations, comprising global navigation satellite system total electron content (TEC), F‐layer peak height, electron density profiles, and column O/N2 ...
Rahul Rathi +5 more
wiley +1 more source
On the importance of middle-atmosphere observations on ionospheric dynamics using WACCM-X and SAMI3 [PDF]
Annales GeophysicaeRecent advances in atmospheric observations and modeling have enabled the investigation of thermosphere–ionosphere interactions as a whole-atmosphere problem.
F. Sassi +6 more
doaj +1 more source