Results 71 to 80 of about 11,342 (218)

Photodissociation of CO in the thermosphere of Venus

Geophysical Research Letters, 1989
Recent investigations of CO photoabsorption demonstrate that photodissociation longward of the ionization threshold at 88.5 nm occurs primarily through line absorptions rather than continuous processes. We have constructed high resolution photoabsorption cross sections for CO at rotational temperatures near 250 K from the improved data on dissociating ...
J. L. Fox, J. H. Black
openaire   +4 more sources

Long‐Lived Equatorial Plasma Bubbles Persisting Into the Afternoon Over the Pacific Sector During the Recovery Phase of the April 2023 Geomagnetic Storm

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Equatorial plasma bubbles (EPBs) are typically nighttime ionospheric irregularities, and their persistence into daytime sectors remains insufficiently understood. Here, we investigate long‐lived EPB‐related plasma depletion structures over the Pacific sector during the recovery phase of the 23–25 April 2023 geomagnetic storm using Formosa ...
Hailun Ye, Wen Yi, Jianfei Wu, Bingkun Yu, Penghao Tian, Xianghui Xue, Yajun Zhu, Jianyuan Wang, Jianyong Lu, Jian Li, Chong Wang, Tingdi Chen, Xiankang Dou   +12 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

The Impacts of Zonal and Meridional Winds on the Observed Occurrence Rate of Equatorial Plasma Bubbles

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Post‐sunset equatorial plasma bubble (EPB) formation is believe to be influenced by factors including thermospheric neutral winds. This study characterizes pre‐sunset neutral winds observed by ICON on EPB occurrences observed by GOLD over the east Atlantic.
V. J. Adkins, S. L. England, A. W. Stephan   +2 more
wiley   +1 more source

Gravity Wave Energy Baselines (∼30–110 km) Established From Lidar Observations at McMurdo (77.84°S, 166.67°E), Antarctica: Energy Dissipation and Constituent Diffusion

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Lidar observations above McMurdo, Antarctica from 2011 to 2024 are used to characterize gravity wave (GWs) potential energies (Ep ${E}_{p}$) in the mesosphere and lower thermosphere (MLT). Alongside characterizations in the middle atmosphere (30–70 km), the GW baselines show dissipation at all altitudes from 30 to 110 km.
Jackson Jandreau, Xinzhao Chu, Yingfei Chen, Chester S. Gardner   +3 more
wiley   +1 more source

2005 August 24 TIEGCM-Weimer thermosphere-ionosphere results

, 2021
Results for the thermosphere-ionosphere from the Thermosphere-Ionosphere Electrodynamic General Circulation Model (TIEGCM) for 2005 August 24 geomagnetic ...
Pham, Kevin
core   +1 more source

Long‐Term Trends in the Ionospheric Equivalent Slab Thickness as a Proxy of Climate Change in the Ionosphere

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Global warming warms the lower atmosphere, but cools and contracts the upper atmosphere. These changes also affect the ionosphere, altering the vertical distribution of plasma through changes in the plasma scale height. Here, we use ionospheric equivalent slab thickness (τ) multidecadal time series, derived through observations from co‐located
A. Pignalberi, T. Alberti
wiley   +1 more source

The stability of short-period extrasolar giant planets [PDF]

, 2008
A three-dimensional coupled thermosphere-ionosphere model for extrasolar giant planets (EXOTIM) has been developed. This is the first such model reported in the literature.
Koskinen, T.T.
core  

Thermospheric mass density derived in near real time from space debris

Journal of Space Weather and Space Climate
Near-Earth space is becoming increasingly congested. A rapid increase in the number of orbiting objects around Earth underscores the need for accurate tracking and prediction of space objects.
Johlander Andreas, Papadogiannakis Seméli, Rasmusson Ola   +2 more
doaj   +1 more source

Structure, Propagation and Variability of the 5‐Day Rossby‐Haurwitz Wave

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 15, 16 August 2026.
Abstract The 5‐day wave is the gravest free Rossby mode predicted by the Laplace shallow water equations, with a latitudinally symmetric, zonal wavenumber one theoretical structure in geopotential extending from pole to pole. It propagates westward along the equator at about 98 m s−1 ${\mathrm{s}}^{-1}$ and was first observed in surface pressure data ...
G. N. Kiladis, R. A. Madden
wiley   +1 more source