Results 41 to 50 of about 225 (104)

Diurnal variations in global Joule heating morphology and magnitude due to neutral winds. [PDF]

, 2018
In the polar ionosphere, variations in Joule heating are significantly controlled by changes in plasma convection, such as that brought about by changes in the interplanetary magnetic field.
Ahn, Aikio, Baker, Baker, Baron, Baumjohann, Cai, Chisham, Clúa de Gonzalez, Codrescu, Cowley, Crooker, Crowley, Deng, Deng, Deng, Deng, Dhadly, Dickinson, Drob, Dungey, Fuller-Rowell, Förster, Hapgood, Hardy, Hardy, Huang, Kamide, Killeen, Knipp, Kosch, Kosch, Kosch, Laundal, Liu, Lu, Lu, Lühr, Matsuo, McHarg, Pettigrew, Richmond, Rishbeth, Robinson, Ruohoniemi, Ruohoniemi, Ruohoniemi, Sakanoi, Shepherd, Thayer, Thayer, Thayer, Thébault, Titheridge, Tsuda, Tsurutani, Vickrey, Wallis, Weimer   +58 more
core   +2 more sources

Simultaneous Observations of Quasi‐Orthogonal Nighttime MSTIDs at Conjugate African‐European Midlatitude Stations on 4 October 2018

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract Two quasi‐orthogonal nighttime medium‐scale traveling ionospheric disturbances (MSTIDs) were observed by conjugate midlatitude all‐sky imagers in Sutherland (32.4° ${}^{\circ}$S, 20.8° ${}^{\circ}$E; magnetic latitude: ∼ ${\sim} $−40.9° ${}^{\circ}$) and Asiago (45.87° ${}^{\circ}$N, 11.53° ${}^{\circ}$E; magnetic latitude: ∼40.3° ${\sim} 40.3{
Zama T. Katamzi‐Joseph, Carlos Martinis, Jonathan J. Makela, Yuichi Otsuka, John Bosco Habarulema, Alicreance Hiyadutuje, Shai Toledano, Mark B. Moldwin, Jeffrey Baumgardner   +8 more
wiley   +1 more source

Thermospheric wind variations observed by a Fabry–Perot interferometer at Tromsø, Norway, at substorm onsets [PDF]

, 2019
Energy input from the magnetosphere during substorms can strongly affect the high-latitude thermosphere. The ionospheric current caused by thermospheric wind variations may also provide a feedback to the magnetosphere.
Otsuka, Yuichi, Oyama, Shin‑ichiro, Shiokawa, Kazuo, Xu, Heqiucen   +3 more
core   +1 more source

Characteristics of Atmospheric Gravity Waves and Medium Scale Traveling Ionospheric Disturbances Derived From EISCAT Measurements

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract This study investigates the characteristics of medium scale traveling ionospheric disturbances (MSTIDs) relative amplitudes (δNe/Ne $\delta Ne/Ne$) in the ionospheric E to lower F regions, using the EISCAT VHF radar data measured from 41 daytime runs in years 2008–2024 carried out mostly between 7−13 $7-13$ UT.
Samson T. Moges, Thomas Ulich, Alexander Kozlovsky, Ruslan O. Sherstyukov, Sari Lasanen, Habtamu Tesfaw   +5 more
wiley   +1 more source

An investigation of traveling ionospheric disturbances (TIDs) in the SANAE HF radar data [PDF]

, 2022
This thesis aims to study the characteristics of traveling ionospheric disturbances (TIDs) as identified in the radar data of the South African National Antarctic Expedition (SANAE) Super Dual Auroral Radar Network (SuperDARN) radar located in Antarctica.
Atilaw, Tsige Yared
core   +2 more sources

Characteristics of Large‐Scale Traveling Ionospheric Disturbances During the 10 May 2024 Geomagnetic Storm

Space Weather, Volume 23, Issue 10, October 2025.
Abstract Based on the total electron content (TEC) observation in the Asian‐Australian and American sectors, this paper investigates the characteristics and hemispheric asymmetry of large‐scale traveling ionospheric disturbances (LSTIDs) during the 10 May 2024 superstorm. We found that the amplitudes and meridional phase velocities of LSTIDs in the two
Tingwei Han, Huijun Le, Yuyan Yang, Wenbo Li, Wenjie Sun, Han Ma, Yijia Zhou, Bowei Liu, Rongjin Du, Libo Liu, Yiding Chen, Ruilong Zhang   +11 more
wiley   +1 more source

Exploring Two‐Dimensional and Three‐Dimensional Propagation of Large‐Scale Traveling Ionospheric Disturbances During the May 2024 Geomagnetic Storm Main Phase

Space Weather, Volume 23, Issue 10, October 2025.
Abstract During the main phase of the May 2024 super geomagnetic storm, we investigated large‐scale traveling ionospheric disturbances (LSTID) using data from densely distributed global GNSS receivers. From both two‐dimensional and three‐dimensional (3D) perspectives, we analyzed LSTID propagation characteristics over North America, European, and ...
Ting Zhang, Yunbin Yuan, Xingliang Huo, Min Li, Kaixin Wang   +4 more
wiley   +1 more source

Unique Signatures of Meridional Wind Variations on the Electron Density Distribution Over the Dip Equator

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract We investigate unusual daytime enhancement and undulations observed in Vertical Total Electron Content (VTEC) during the extreme G5 geomagnetic storm on 11 May 2024 over the dip equatorial station Trivandrum, India using a physics‐based ionospheric model.
Arya Ashok, K. M. Ambili, R. K. Choudhary, Gang Lu   +3 more
wiley   +1 more source

Modelo empírico das componentes dos ventos neutros termosféricos no setor americano baseado em dados do satélite UARS-WINDII para períodos geomagneticamente calmos [PDF]

, 2020
Thermospheric Neutral Winds (TNW) play a crucial role in the dynamics of the ionosphere by acting directly on the plasma drift. The TNW are the main maintenance mechanism of the nocturnal ionosphere.
Asevedo Júnior, Wivaldo Dantas de
core  

An Ionospheric Disturbed Index Based on ROTI

Space Weather, Volume 23, Issue 6, June 2025.
Abstract The ionosphere has significant impacts on wireless communication, satellite navigation, and space weather. Based on hundreds of global GNSS observation stations, we calculate the rate of TEC index (ROTI). Through the analysis of ROTI, we establish a global ionospheric disturbed index (IDI) to directly characterize ionospheric disturbances ...
Cheng Wang, Xiaoxue Min, Hong Hu
wiley   +1 more source