منابع مشابه
Sputtering and heating of Titan's upper atmosphere.
Titan is an important endpoint for understanding atmospheric evolution. Prior to Cassini's arrival at Saturn, modelling based on Voyager data indicated that the hydrogen escape rate was large (1-3x1028amus-1), but the escape rates for carbon and nitrogen species were relatively small (5x1026amus-1) and dominated by atmospheric sputtering. Recent analysis of the structure of Titan's thermosphere...
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Magnetic waves are a relevant component in the dynamics of the solar atmosphere. Their significance has increased because of their potential as a remote diagnostic tool and their presumed contribution to plasma heating processes. We discuss our current understanding of coronal heating by magnetic waves, based on recent observational evidence and theoretical advances. The discussion starts with ...
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Surfur-bearing molecules have been found at the surface of Mars by the Viking lander, the Spirit and Opportunity rovers, and the OMEGA infrared spectrometer aboard Mars Express. However, no gaseous sulfur-bearing species have ever been detected in the Martian atmosphere. We search for SO2 signatures in the thermal spectrum of Mars at 7.4 μm using the Texas Echelon Cross Echelle Spectrograph (TE...
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Since the first in situ observations of the Martian atmosphere were made by the twin Viking landers, we have learned considerably more about its composition, dynamics and variability. Not only did the new data on global atmospheric densities generate opportunities to understand the atmospheric composition of early Mars and supply constraints at the upper limit of General Circulation Models, it ...
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Water has had a major impact on the martian surface and climate, and understanding the history of water is a major scientific goal of NASA's Mars Exploration Program. While there is ample and increasing evidence that the ancient Mars had copious amounts of water on its surface, there is no general understanding of how much of that water remains sequestered in the martian crust today, and how mu...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Planets
سال: 2013
ISSN: 2169-9097
DOI: 10.1002/jgre.20164