Results 61 to 70 of about 1,980 (216)

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

Thermal Escape of Atomic Hydrogen on Mars: A Comprehensive View With a General Circulation Model

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Mars loses water mainly through the photodissociation of water vapor, followed by the thermal escape of light hydrogen atoms. Observations have revealed large seasonal variations in hydrogen concentration in the upper thermosphere, peaking during southern summers and intensifying during dust storms.
Alexander S. Medvedev, Ngan H. D. Trinh
wiley   +1 more source

Large‐Scale Magnetosheath Jets Formed by Shock‐Discontinuity Interactions: A Three‐Dimensional Global Hybrid Simulation

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Magnetosheath high‐speed jets with enhanced dynamic pressure are common in Earth's magnetosheath and can impinge on the magnetopause, driving pronounced boundary deformation. Recent observations indicate that shock–discontinuity interactions (SDIs) can generate magnetosheath jets, but the formation mechanism is still unclear.
Jin Guo, San Lu, Quanming Lu, Yufei Zhou, Boyi Wang, Tianran Sun, Yihong Guo, Zhongwei Yang, Shimou Wang, Junyi Ren, Jiuqi Ma, Chao Shen, Xinliang Gao, Rongsheng Wang   +13 more
wiley   +1 more source

Soft X‐Ray Emission From Saturn's Magnetosheath II: Solar Wind Driving

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Saturn's magnetosphere is dominated by Enceladus‐sourced neutrals, which spread throughout the system into the magnetosheath. The neutrals can charge exchange with highly charged solar wind ions, causing soft X‐ray emission (<2 ${< } 2$ keV) upon de‐excitation of the ion.
D. Naylor, L. C. Ray, P. C. Rogan, W. R. Dunn, H. T. Smith   +4 more
wiley   +1 more source

Mercury's sodium exosphere [PDF]

, 2016
In this dissertation I examine the properties and origins of the most energetic component of Mercury's atmosphere and how it couples to the planet's magnetosphere and space environment.
Schmidt, Carl
core  

Constraining Electron‐Impact Ionization of O2 Through UV Aurora Observations at Ganymede

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract While photoionization rates of Ganymede's O2 ${\mathrm{O}}_{2}$ dominated atmosphere are well constrained, the contribution of electron‐impact ionization is rather uncertain. Previous quantitative estimates have relied on assumptions about densities and energy distributions of precipitating electrons, or on rare spacecraft measurements that ...
Stefan Duling, Joachim Saur, Darrell Strobel, Philippa Molyneux, Jamey R. Szalay, Thomas K. Greathouse   +5 more
wiley   +1 more source

Mercury's exosphere origins and relations to its magnetosphere and surface

, 2007
Mariner 10, the only spacecraft that ever passed close to Mercury, revealed several unexpected characteristics: an intrinsic magnetosphere, the highest mean density of any Solar System terrestrial planet and a very thin non-collisional atmosphere ...
Potter, A. E., Delcourt, Dominique, C., Mendillo, M., Yan, Nicolas, Leblanc, François, Sprague, A. L., Luhmann, J. G., Chassefière, Eric, Cremonese, Gabriele, Killen, R. M., Kallio, E., Jambon, Albert, Johnson, R. E., Hunten, D. M.   +13 more
core   +1 more source

Balancing Earth's Deep Carbon Cycle

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract The deep carbon cycle of the Earth remains poorly understood in spite of its importance to the evolution of our planet. Here we consider estimated carbon fluxes for plume‐related volcanism from the lower mantle as an independent constraint on the deep carbon cycle, avoiding uncertainties regarding high pressure mineralogy.
Sogen Kitamura, Shintaro Kadoya, John W. Hernlund, Takashi Nakagawa   +3 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

The hydrogen Lyman α line shape in the exospheres of terrestrial objects in the solar system

Frontiers in Astronomy and Space Sciences
The exospheres of all objects are mostly made of atomic hydrogen. Because the Sun is bright in Lyman α, the properties of the H atoms in the exospheres of certain terrestrial solar system objects can be studied by analyzing the resonantly scattered solar
Dolon Bhattacharyya, Edward M. B. Thiemann, Janet Machol, Janet Machol, Gonzalo Cucho-Padin, Gonzalo Cucho-Padin, Sabyasachi Chatterjee, Walter Harris, Edwin Mierkiewicz   +8 more
doaj   +1 more source