Results 31 to 40 of about 19,021 (226)

Long-term variability of CO2 and O in the Mars upper atmosphere from MRO radio science data [PDF]

, 2015
We estimate the annual variability of CO2 and O partial density using approximately 6years of Mars Reconnaissance Orbiter (MRO) radio science data from August 2006 to January 2012, which cover three full Martian years (from the northern hemisphere summer
Fricke, Susan K., Genova, Antonio, Goossens, Sander, Lemoine, Frank G., Mazarico, Erwan, Smith, David E., Zuber, Maria T.   +6 more
core   +1 more source

Impacts of Lower Thermospheric Atomic Oxygen on Thermospheric Dynamics and Composition Using the Global Ionosphere Thermosphere Model [PDF]

Journal of Geophysical Research: Space Physics, 2020
AbstractThe exchange of energy between the lower atmosphere and the ionosphere thermosphere system is not well understood. One of the parameters that is important in the lower thermosphere is atomic oxygen. It has recently been observed that atomic oxygen is higher in summer at ∼95 km.
Garima Malhotra, Aaron J. Ridley, Daniel R. Marsh, Chen Wu, Larry J. Paxton, Martin G. Mlynczak   +5 more
openaire   +2 more sources

Vertical damping of gravity waves evaluated from ACS-TGO solar occultation measurements on Mars

Frontiers in Astronomy and Space Sciences
Amplitudes of gravity waves generated in the lower and denser atmospheric layers grow exponentially with height as they propagate to the upper and thinner atmosphere, where they are reduced by various processes.
Ekaterina D. Starichenko, Alexander S. Medvedev, Denis A. Belyaev, Anna A. Fedorova, Alexander Trokhimovskiy, Paul Hartogh, Franck Montmessin, Oleg I. Korablev   +7 more
doaj   +1 more source

Recent progress on the retrieval and modeling of thermosphere mass density

地球与行星物理论评, 2023
The thermosphere is the atmospheric layer extending from about 90 km to nearly 1000 kilometers, which is an important interreaction area between the Sun and the Earth.
Jiuhou Lei, Ruoxi Li, Dexin Ren, Libin Weng, Haibing Ruan   +4 more
doaj   +1 more source

Center for geospace storms graduate student workshop

Frontiers in Astronomy and Space Sciences
The US National Aeronautics and Space Administration (NASA) DRIVE Center for Geospace Storms (CGS) hosted a workshop for graduate students conducting research in geospace science in November 2024.
Amy Keesee, Viacheslav G. Merkin, Michael Wiltberger, Stephen Hale, Eric Winter, Nikhil Rao   +5 more
doaj   +1 more source

The Upper Atmosphere of HD17156b

, 2008
HD17156b is a newly-found transiting extrasolar giant planet (EGP) that orbits its G-type host star in a highly eccentric orbit (e~0.67) with an orbital semi-major axis of 0.16 AU.
A. D. Aylward, Anicich, Auerbach, Banks, Baulch, Erkaev, Fischer, Fischer, Hummer, Hut, Irwin, Koskinen, Liang, Press, Ribas, S. Miller, Schneiter, Shkolnik, Storey, Sundstrom, T. T. Koskinen, Tian, Vidal-Madjar, Vidal-Madjar, Yan   +24 more
core   +1 more source

High-altitude gravity waves in the Martian thermosphere observed by MAVEN/NGIMS and modeled by a gravity wave scheme

, 2015
First high-altitude observations of gravity wave (GW)-induced CO$_2$ density perturbations in the Martian thermosphere retrieved from NASA's NGIMS instrument on board the MAVEN satellite are presented and interpreted using the extended GW ...
England, Scott L., Jakosky, Bruce M., Kuroda, Takeshi, Liu, Guiping, Mahaffy, Paul R., Medvedev, Alexander S., Yiğit, Erdal   +6 more
core   +1 more source

New thermosphere neutral mass density and crosswind datasets from CHAMP, GRACE, and GRACE-FO

Journal of Space Weather and Space Climate, 2023
We present new neutral mass density and crosswind observations for the CHAMP, GRACE, and GRACE-FO missions, filling the last gaps in our database of accelerometer-derived thermosphere observations.
Siemes Christian, Borries Claudia, Bruinsma Sean, Fernandez-Gomez Isabel, Hładczuk Natalia, den IJssel Josevan, Kodikara Timothy, Vielberg Kristin, Visser Pieter   +8 more
doaj   +1 more source

Upper atmospheres and ionospheres of planets and satellites

, 2017
The upper atmospheres of the planets and their satellites are more directly exposed to sunlight and solar wind particles than the surface or the deeper atmospheric layers.
A Bhardwaj, A García Muñoz, A Mahieux, A Pätzold, A Seiff, A Sánchez-Lavega, A-S Wong, AJ Coates, AJ Friedson, AJ Kliore, AJ Kliore, AN Volkov, BM Jakosky, BM Jakosky, CD Parkinson, CGA Smith, CGA Smith, D Grodent, D Snowden, D Snowden, DC Catling, DL Huestis, DM Hunten, DP Hinson, E Lellouch, F González-Galindo, F Herbert, FJ Crary, GF Lindal, GF Lindal, GF Lindal, GM Keating, GMP Schubert, H Feuchtgruber, H Lammer, HB Niemann, ICF Mueller-Wodarg, ICF Müller-Wodarg, ICF Müller-Wodarg, ICF Müller-Wodarg, J Cui, J O’Donoghue, J-E Wahlund, J. M. Grebowsky, JEP Connerney, JH Waite Jr, JI Moses, JI Moses, JL Bertaux, JL Fox, JL Fox, JL Fox, K Dennerl, KI Matcheva, KL Miller, L Ben-Jaffel, LA Young, LN Fletcher, M Fulchignoni, MC Liang, MF Vogt, MH Rees, MH Stevens, N Mangold, NM Schneider, P Drossart, P Lavvas, P Lavvas, P Lavvas, P Withers, P Withers, P Withers, RJ Vervack Jr, RK Choudhary, RR Meier, RT Clancy, RT Clancy, RV Yelle, RV Yelle, RV Yelle, RV Yelle, RV Yelle, RW Schunk, S Miller, S Miller, SG Edgington, SJ Bauer, SV Badman, SW Bougher, SW Bougher, T Koskinen, T Majeed, T Majeed, TD Robinson, TE Cravens, TG Slanger, TH Zurbuchen, TJ Stubbs, TK Greathouse, TL Zhang, TT Koskinen, TT Koskinen, TT Koskinen, V Vuitton, V Vuitton, V. Vuitton, VA Krasnopolsky, W Liu, YH Kim, YH Kim   +109 more
core   +1 more source

Development and Validation of the Whole Atmosphere Community Climate Model With Thermosphere and Ionosphere Extension (WACCM‐X 2.0)

Journal of Advances in Modeling Earth Systems, 2018
Key developments have been made to the NCAR Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension (WACCM‐X). Among them, the most important are the self‐consistent solution of global electrodynamics, and transport of O+ in ...
Han‐Li Liu, Charles G. Bardeen, Benjamin T. Foster, Peter Lauritzen, Jing Liu, Gang Lu, Daniel R. Marsh, Astrid Maute, Joseph M. McInerney, Nicholas M. Pedatella, Liying Qian, Arthur D. Richmond, Raymond G. Roble, Stanley C. Solomon, Francis M. Vitt, Wenbin Wang   +15 more
doaj   +1 more source