Results 51 to 60 of about 6,471 (197)

A Survey of Atmospheric Gravity Waves Observed by GOLD During Quiet to Moderate Solar and Geomagnetic Activity

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Atmospheric gravity waves (GWs) are believed to transport energy and momentum between different regions of the atmosphere. Historically, observations of these waves from both ground and space have been relatively abundant at altitudes up to the lower thermosphere, and somewhat less abundant in the upper thermosphere and F‐region ionosphere ...
Scott L. England, Shun‐Rong Zhang, Scott Evans, Richard W. Eastes   +3 more
wiley   +1 more source

Variability of Earth’s ionospheric outflow in response to the dynamic terrestrial exosphere

Frontiers in Astronomy and Space Sciences
The most abundant neutral constituent in the exospheric region (i.e., beyond ≈ 500 km altitude) is the atomic hydrogen (H); however, its density distributions predicted by physics-based models have been challenged by satellite-based observations of its ...
Mei-Yun Lin, Mei-Yun Lin, Gonzalo Cucho-Padin, Gonzalo Cucho-Padin, Pedro Oliveira, Alex Glocer, Enrique Rojas   +6 more
doaj   +1 more source

Eine atomistische Deutung der Brunt-Vaisälä-Periode

Meteorologische Zeitschrift, 1994
In einer kurzen Notiz wird eine atomistische Deutung der Brunt-Väisälä-Periode diskutiert. Es wird gezeigt, daß an der unteren Grenze der Exosphäre, wo per definitionem die mittlere freie Weglänge und die Skalenhöhe von gleicher Größenordnung sind, die ...
A. Muschinski
doaj   +1 more source

Theory for planetary exospheres: II. Radiation pressure effect on exospheric density profiles

Icarus, 2016
The planetary exospheres are poorly known in their outer parts, since the neutral densities are low compared with the instruments detection capabilities. The exospheric models are thus often the main source of information at such high altitudes. We present a new way to take into account analytically the additional effect of the radiation pressure on ...
Beth, A, Garnier, P, Toublanc, D, Dandouras, I, Mazelle, C   +4 more
openaire   +4 more sources

Determining the Magnetopause Location With SMILE‐SXI Using a Constrained Solar Wind Independent SWCX Model

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract The soft X‐ray imager (SXI) on the SMILE mission promises to revolutionize our understanding of the magnetopause by observing solar wind charge exchange emission from the magnetosheath on a global scale. The primary goal of this instrument is to infer the position and shape of the magnetopause from these images.
S. J. Wharton, J. A. Carter, S. Sembay, A. Paganini, V. Maddi, C. Pagani, Z. Clare, A. Samsonov   +7 more
wiley   +1 more source

An Estimate of the Importance of Electron-stimulated Desorption of Sodium at Mercury

The Planetary Science Journal
We revisit the importance of electron-stimulated Desorption (ESD) as a source of neutral sodium (Na) atoms and Na ^+ ions in Mercury’s exosphere and ionosphere.
Rosemary M. Killen, Jason L. McLain, Matthew H. Burger, Orenthal J. Tucker, Liam S. Morrissey, Ronald J. Vervack Jr.   +5 more
doaj   +1 more source

Mercury's Hollows: A Potential Signature of Sulfur Exosphere‐Subsurface Transport

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Bright geological formations called hollows were observed at Mercury and are mostly found in impact craters. While their composition is unknown, subsurface sulfur could be responsible for their formation. Mercury's porous surface favors the subsurface diffusion of returning exospheric atoms.
S. Verkercke, F. Leblanc, J.‐Y. Chaufray, M. S. Phillips, G. Munaretto, E. Caminiti, L. Morrissey   +6 more
wiley   +1 more source

Maps of Solar Wind Plasma Precipitation onto Mercury’s Surface: A Geographical Perspective

The Planetary Science Journal, 2023
Mercury is the closest planet to the Sun, possesses a weak intrinsic magnetic field, and has only a very tenuous atmosphere (exosphere). These three conditions result in a direct coupling between the plasma emitted from the Sun (namely, the solar wind ...
Federico Lavorenti, Elizabeth A. Jensen, Sae Aizawa, Francesco Califano, Mario D’Amore, Deborah Domingue, Pierre Henri, Simon Lindsay, Jim M. Raines, Daniel Wolf Savin   +9 more
doaj   +1 more source

Enhancement of Terrestrial Diffuse X-ray Emission Associated With Coronal Mass Ejection and Geomagnetic Storm

, 2011
We present an analysis of a Suzaku observation taken during the geomagnetic storm of 2005 August 23-24. We found time variation of diffuse soft X-ray emission when a coronal mass ejection hit Earth and caused a geomagnetic storm.
Ezoe, Yuichiro, Mitsuda, Kazuhisa, Miyoshi, Yoshizumi, Ohashi, Takaya, Oishi, Shihoko, Terada, Naoki, Yoshitake, Hiroshi   +6 more
core   +1 more source

Uranus' Long‐Term Thermospheric Cooling Is Unlikely to Be Primarily Driven by the Solar Wind

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Over the last 40 yrs, Uranus' thermospheric temperature has decreased by ∼8 K/yr. Here we show that this is less likely to be driven by solar wind kinetic power than previously thought. We determine that the solar wind kinetic power at Uranus has been increasing since the start of solar cycle 24 in 2009, while Uranus's thermospheric ...
Jamie M. Jasinski, Henrik Melin, James A. Sinclair, Sophia Zomerdijk‐Russell, Nick Achilleos, Carol Paty   +5 more
wiley   +1 more source