Results 1 to 10 of about 722,187 (326)
Meteoric Metal Chemistry in the Martian Atmosphere. [PDF]
J Geophys Res Planets, 2018 AbstractRecent measurements by the Imaging Ultraviolet Spectrograph (IUVS) instrument on NASA's Mars Atmosphere and Volatile EvolutioN mission show that a persistent layer of Mg+ ions occurs around 90 km in the Martian atmosphere but that neutral Mg atoms are not detectable.
Plane JMC +5 more
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Stability of the Martian Atmosphere [PDF]
Science, 1972 A detailed chemical dynamic model is presented for a moist martian atmosphere. Recombination of carbon dioxide is catalyzed by trace amounts of water. The abundances of carbon monoxide and molecular oxygen should vary in response to changes in atmospheric water and atmospheric mixing.
Michael B. McElroy, T. M. Donahue
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Impact sculpting of the early martian atmosphere. [PDF]
Sci AdvIntense bombardment of solar system planets in the immediate aftermath of protoplanetary disk dissipation has played a key role in their atmospheric evolution. During this epoch, energetic collisions will have removed substantial masses of gas from rocky planet atmospheres.
Shorttle O +6 more
europepmc +7 more sources
A mesoscale model for the Martian atmosphere [PDF]
Journal of Geophysical Research: Planets, 2002 The Pennsylvania State University/National Center for Atmosphere Research Mesoscale Model Version 5 (MM5) has been converted for use on Mars. Modifications are based on schemes implemented in the Geophysical Fluid Dynamics Laboratory Mars General Circulation Model (GCM).
A. D. Toigo, M. I. Richardson
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The value of returning a sample of the Martian atmosphere. [PDF]
Proc Natl Acad Sci U S AThe elemental and isotopic abundances of major species in the Martian atmosphere have been determined, but analyses often lack sufficient precision, and those of minor and trace species are frequently not well known. Many important questions about the evolution and current state of Mars require the kind of knowledge that can be gained from analysis of ...
Swindle TD +3 more
europepmc +4 more sources
Observation of pressure variations in the Martian atmosphere [PDF]
Geophysical Research Letters, 2003 Pressure waves in the Martian atmosphere could so far be observed only in the presence of clouds. Thanks to the Mars Global Surveyor/Mars Orbiter Laser Altimeter (MGS/MOLA), a direct observation is now possible, with the method presented here. Many more events are thus potentially observable. We compare altimetry measurements from MGS/MOLA and spectral
A. Gendrin +3 more
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Of Martian atmospheres, oceans, and fossils
Icarus, 1990 Abstract Based on the absence of extensive cratering on the northern Martian plains, it is suggested that these plains were the sites of ancient oceans, 2 to 3.5 Gyr ago, with a calculatable water depth of (≥) 0.7 km. Also it appears possible to interpret the crater density counts for Chryse and the highlands as implying that Mars had a fairly dense ...
H. L. Helfer
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Stable carbon isotope evolution of formaldehyde on early Mars [PDF]
Scientific ReportsOrganic matter in the Martian sediments may provide a key to understanding the prebiotic chemistry and habitability of early Mars. The Curiosity rover has measured highly variable and 13C-depleted carbon isotopic values in early Martian organic matter ...
Shungo Koyama +8 more
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Structure of the Martian Upper Atmosphere.
The Astrophysical Journal, 1965 Jean L'Ecuyer +2 more
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Clouds in the Martian Atmosphere [PDF]
, 2021 Although resembling an extremely dry desert, planet Mars hosts clouds in its atmosphere. Every day somewhere on the planet a part of the tiny amount of water vapor held by the atmosphere can condense as ice crystals to form mainly cirrus-type clouds. The existence of water ice clouds has been known for a long time and they have been studied for decades,
Määttänen, Anni, Montmessin, Franck
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