Results 61 to 70 of about 2,360 (197)

Comparison of travelling ionospheric disturbance measurements with thermosphere/ionosphere model results [PDF]

Annales Geophysicae, 2003
Abstract. Comparisons of modeled and measured responses of the ionosphere to the passage of atmospheric gravity waves are made for data recorded by an ionosonde located at Almaty (76°55' E, 43°15' N) from June 2000 until May 2001. Temporal variations of the altitude (hmF) and electron content (NmF) of the F-layer peak are used for comparisons.
Ashkaliev, Ya. F., Gordienko, G. I., Jacobi, Ch., Litvinov, Yu. G., Vodyannikov, V. V., Yakovets, A. F.   +5 more
openaire   +4 more sources

Impact of Non‐Classical Gravity‐Wave Dynamics on Middle‐Atmosphere Mean Flow and Solar Tides

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 8, 28 April 2026.
Abstract Conventional gravity‐wave (GW) parameterizations neglect three aspects of GW dynamics. Instead of momentum and entropy fluxes they use Eliassen‐Palm fluxes, thereby neglecting the possibility that resolved flow are not in geostrophic and hydrostatic balance.
T. Kühner, G. S. Völker, U. Achatz
wiley   +1 more source

Traveling Ionospheric Disturbances and Ionospheric Perturbations Associated With Solar Flares in September 2017 [PDF]

Journal of Geophysical Research: Space Physics, 2019
AbstractSolar flares provide strong impulsive radiation and energy injection to the sunlit upper atmosphere. The impact on the ionosphere is immense in spatial scale, and therefore, it is not immediately evident if dramatically elevated neutral heating can lead to excitation of acoustic gravity waves.
Shun‐Rong Zhang, Anthea J. Coster, Philip J. Erickson, Larisa P. Goncharenko, William Rideout, Juha Vierinen   +5 more
openaire   +3 more sources

Do Eclipse‐Induced Thermospheric TADs Originate From Above or Below?

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Solar eclipses generate significant wave activity in the Earth's upper atmosphere. The source region of eclipse‐induced Traveling Atmospheric Disturbances (TADs) in the upper thermosphere—particularly the relative contributions of gravity waves from the thermosphere itself versus the lower atmosphere—remains unknown. Using the Whole Atmosphere
Yu Jiao, Jing Liu, Shuhan Li, Joseph M. McInerney, Jianyong Li, Yuyan Yang   +5 more
wiley   +1 more source

Travelling ionospheric disturbances detection: A statistical study of detrending techniques, induced period error and near real-time observables

Journal of Space Weather and Space Climate
Due to advances in remote sensing of the Earth’s Ionosphere through Total Electron Content (TEC) estimates by Global Navigation Satellite System (GNSS) receivers, it is possible to detect and characterize Travelling Ionospheric Disturbances (TIDs) in ...
Guerra Marco, Cesaroni Claudio, Ravanelli Michela, Spogli Luca   +3 more
doaj   +1 more source

The ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse [PDF]

Annales Geophysicae, 2009
We investigate the ionospheric behavior in conjugate hemispheres during the 3 October 2005 solar eclipse, on the basis of observations of electron temperature (Te) from the Defense Meteorological Satellites Program (DMSP) spacecraft, F2 layer critical
H. Le, H. Le, L. Liu, X. Yue, W. Wan
doaj   +1 more source

Wave‐Based Quantification of Ion Composition in the Earth's Magnetosphere‐Ionosphere‐Coupling Region

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Ion composition critically determines the basic kinetic characteristics of plasma and affects energy transmission of the magnetosphere. However, it exhibits significant variations with altitude, latitude, local time, longitude, and also with geomagnetic and solar activity.
Zhijie Qin, Hui Zhu, Zhihai Ouyang, Huicong Chen, Zhenghao She   +4 more
wiley   +1 more source

Statistics of travelling ionospheric disturbances observed using the LOFAR radio telescope

Journal of Space Weather and Space Climate
A climatology of Travelling Ionospheric Disturbances (TIDs) observed using the LOw Frequency ARray (LOFAR) has been created based on 2723 h of astronomical observations.
Boyde Ben, Wood Alan G., Dorrian Gareth, de Gasperin Francesco, Mevius Maaijke   +4 more
doaj   +1 more source

Some aspects of large-scale travelling ionospheric disturbances which originate at conjugate locations in auroral zones, cross the equator and sometimes encircle the earth [PDF]

Annales Geophysicae, 2011
The occurrence of large-scale travelling ionospheric disturbances (LS-TIDs) has been examined. Initially some literature on their generation is considered.
G. G. Bowman, I. K. Mortimer
doaj   +1 more source

Sudden Ionospheric Disturbances Generated by Solar Flares—Not so Sudden?

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract It is known that solar flares generate instantaneous ionization enhancement, referred to as sudden ionospheric disturbance (SID), that occurs simultaneously across the entire dayside. In this work, we use high‐rate 1‐s data of total electron content (TEC) to analyse ionospheric response to 13 solar flares that occurred in 2003–2023.
B. Maletckii, E. Astafyeva, N. M. Pedatella, L. Qian   +3 more
wiley   +1 more source