Results 91 to 100 of about 725,463 (303)

Advective Fluxes in the Martian Regolith as a Mechanism Driving Methane and Other Trace Gas Emissions to the Atmosphere

Geophysical Research Letters, 2020
Advective fluxes influence methane and CO2 soil emissions into the atmosphere on Earth and may drive trace gas emissions in the Mars atmosphere. However, their relevance in the Martian regolith has not been evaluated to date.
D. Viúdez‐Moreiras, R. E. Arvidson, J. Gómez‐Elvira, C. Webster, C. E. Newman, P. Mahaffy, A. R. Vasavada   +6 more
doaj   +1 more source

Interactions of rare earth elements with living organisms and emerging biotechnical applications

PLANTS, PEOPLE, PLANET, Volume 7, Issue 5, Page 1251-1274, September 2025.
Rare earth elements (REEs) are critical resources required to achieve net‐zero carbon emission targets and energy security. However, rising demand for REEs coupled with significant extraction and processing challenges and geopolitical risks restricts access to REE resources.
Samantha A. McGaughey, Shagufta Iqbal, Annamaria De Rosa, Jessica A. Caley, Anna H. Kaksonen, Denys Villa‐Gomez, Caitlin S. Byrt   +6 more
wiley   +1 more source

Effect of the Net Charges Carried by Dust on Martian Atmospheric Temperature

Geophysical Research Letters, 2023
Dust particles suspended in the dusty Martian atmosphere are prone to being charged. In this paper, we investigate the effect of the net charges carried by dust particles on the radiative properties of Martian dust.
Xuebang Gao, Li Xie, Jùn Zhou
doaj   +1 more source

Testing the Fidelity of Paleopole Determinations From Multidirectionally Magnetized Lunar Crustal Anomaly Source Bodies

Journal of Geophysical Research: Planets, Volume 130, Issue 9, September 2025.
Abstract Inversions of satellite observations of the lunar crustal magnetic field do not consistently produce regional magnetization directions consistent with a selenocentric axial dipolar field. We modeled the thermal evolution of anomaly source bodies in the lunar crust and found that large features (impact melt sheets and ejecta deposits) cool ...
T. Chaffee, S. M. Tikoo, R. E. Maxwell, I. Garrick‐Bethell   +3 more
wiley   +1 more source

A First Look at Carbon and Oxygen Stable Isotope Measurements of Martian Atmospheric C02 by the Phoenix Lander [PDF]

, 2009
Precise stable isotope measurements of the CO2 in the martian atmosphere have the potential to provide important constraints for our understanding of the history of volatiles, the carbon cycle, current atmospheric processes, and the degree of water/rock ...
Boynton, W.V., Hamara, D., Hoffman, J.H., Ming, D.W., Niles, P.B.   +4 more
core   +1 more source

Impact inducted surface heating by planetesimals on early Mars

, 2014
We investigate the influence of impacts of large planetesimals and small planetary embryos on the early Martian surface on the hydrodynamic escape of an early steam atmosphere that is exposed to the high soft X-ray and EUV flux of the young Sun.
Dvorak, R., Erkaev, N. V., Güdel, M., Kislyakova, K. G., Lammer, H., Maindl, T. I., Odert, P., Pilat-Lohinger, E., Schäfer, C., Speith, R.   +9 more
core   +1 more source

Thermal Structure of the Martian Upper Atmosphere From MAVEN NGIMS

Journal of Geophysical Research: Planets, 2018
The Neutral Gas and Ion Mass Spectrometer (NGIMS) aboard the NASA Mars Atmosphere and Volatile EvolutioN (MAVEN) mission measures the structure and variability of the Martian upper atmosphere.
S. Stone, R. Yelle, M. Benna, M. Elrod, P. Mahaffy   +4 more
semanticscholar   +1 more source

Impact of Gravity Waves From Tropospheric and Non‐Tropospheric Sources on the Middle and Upper Atmosphere and Comparison With ICON/MIGHTI Winds

Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.
Abstract We study the dynamical and thermal roles of internal gravity waves generated in the troposphere and above using the Coupled Middle Atmosphere Thermosphere‐2 General Circulation Model. This model incorporates the whole atmosphere nonlinear spectral gravity wave parameterization and its extension to include non‐tropospheric sources. We conducted
Erdal Yiğit, Alexander S. Medvedev, Ayden L. S. Gann, Gary P. Klaassen, Douglas E. Rowland   +4 more
wiley   +1 more source

Morphology of the Excited Hydroxyl in the Martian Atmosphere: A Model Study—Where to Search for Airglow on Mars?

Remote Sensing
Monitoring excited hydroxyl (OH*) airglow is broadly used for characterizing the state and dynamics of the terrestrial atmosphere. Recently, the existence of excited hydroxyl was confirmed using satellite observations in the Martian atmosphere.
Dmitry S. Shaposhnikov, Mykhaylo Grygalashvyly, Alexander S. Medvedev, Gerd Reinhold Sonnemann, Paul Hartogh   +4 more
doaj   +1 more source

Very high elevation water ice clouds on Mars: Their morphology and temporal behavior [PDF]

Quantitative analysis of Viking images of the martian planetary limb has uncovered the existence and temporal behavior of water ice clouds that form between 50 and 90 km elevation.
Jaquin, Fred
core   +1 more source