Results 61 to 70 of about 19,021 (226)

First Quantitative Results on the Response of Green and Red Line Dayglow Emissions to Solar Flares of Different Magnitudes

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Flares originate from the impulsive release of magnetic energy in the solar atmosphere. The rise in X‐ray flux enhances ionization/electron content in the upper atmosphere, modifying the photochemical and dynamical processes that govern the ionosphere‐thermosphere behavior.
Komal, Duggirala Pallamraju
wiley   +1 more source

New perspectives on thermosphere tides: 2. Penetration to the upper thermosphere [PDF]

Earth, Planets and Space, 2014
In this paper, we present new multi-year and 72-day mean seasonal-latitudinal tidal structures in exospheric temperature derived from joint analysis of CHAMP and GRACE accelerometer measurements. These results include diurnal tides DE3, DE2, D0, and DW2 and semidiurnal tides S0, SE1, SE2, SE3, SW4, and SW6.
Forbes, J., Zhang, X., Bruinsma, S.
openaire   +2 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

Towards a global model of the martian atmosphere [PDF]

, 2003
In an effort to continuously improve the capabilities of the Martian atmospheric predictions at LMD, the GCM has been extended into thermospheric heights thus creating the first model to self-consistently couple the lower and upper regions of the ...
Angelats i Coll, M., Forget, F., González-Galindo, F., Hourdin, F., Lewis, S.R., López-Valverde, M.A., Read, P.L., Wanherdrick, Y.   +7 more
core  

Magnetopause Boundary Layers in Low Mach CME‐Driven Storm Environment

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Magnetopause boundary layers (BLs) play an important role mediating plasma and energy exchange between the solar wind/magnetosheath and Earth's magnetosphere. Energy exchange across the magnetopause is enhanced during storms, yet little work has been done investigating BLs during storms.
Rachel C. Rice, Li‐Jen Chen, Tai Phan, Brandon L. Burkholder, Stephen A. Fuselier, Roman Gomez, Cristian P. Ferradas, Jason M. H. Beedle, Megha Pandya   +8 more
wiley   +1 more source

The Impact of Polar Vortex Strength on the Longitudinal Structure of the Noontime Mid-Latitude Ionosphere and Thermosphere

Remote Sensing
Ground-based ionospheric, CHAMP/STAR, and GOCE satellite neutral density ρ observations under deep solar minimum conditions were used to find whether there is a dependence of longitudinal variations on polar vortex strength. Ionospheric stations at fixed-
Loredana Perrone, Andrey Mikhailov
doaj   +1 more source

Gravity waves in the middle atmosphere: Recent progress and needed studies [PDF]

, 1986
The recent recognition of the important role played by gravity waves in the large-scale circulation and thermal structure of the mesosphere and lower thermosphere has stimulated considerable research on their properties and their middle atmosphere ...
Fritts, D. C.
core   +1 more source

An event study to provide validation of TING and CMIT geomagnetic middle-latitude electron densities at the F2 peak [PDF]

, 2008
[1] The coupled thermosphere-ionosphere magnetosphere (CMIT) model and the Thermosphere Ionosphere Nested Grid (TING) model have been run to simulate the 15 May 1997 interplanetary coronal mass ejection\u27s (ICME) effects on the Earth\u27s ionosphere ...
Burns, A. G., Killeen, T. L., Landivar, J. E., Lopez, R. E., Soloman, S. C., Spence, Harlan E., Wang, W., Wiltberger, M.   +7 more
core   +2 more sources

Can the International Reference Ionosphere Model Predict Long‐Term Trends in the Ionosphere?

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract The International Reference Ionosphere (IRI) model can partially reproduce ionospheric long‐term trends (LTTs), although not intentionally, provided that an appropriate effective ionospheric index is used. We evaluate how model predictions driven by a solar activity proxy (R12) and by an effective ionospheric proxy (IG12) can reproduce the ...
A. Pignalberi, M. Pietrella, T. Alberti, M. Pezzopane   +3 more
wiley   +1 more source

Exploring the Long-Term Relationship Between Thermospheric ∑O/N₂ and Solar EUV Flux

Remote Sensing
Column O/N2 ratio (∑O/N2), a physical quantity representing thermospheric disturbances, is influenced by solar extreme ultraviolet radiation flux (QEUV) changes.
Hao Li, Cunying Xiao, Kuan Li, Zewei Wang, Xiaoqi Wu, Yang Yu, Luo Xiao   +6 more
doaj   +1 more source