منابع مشابه
Radiocarbon on Titan
© Meteoritical Society, 2002. Printed in USA. 867 Prelude preprint MS#4690 Abstract–We explore the likely production and fate of 14C in the thick nitrogen atmosphere of Saturn's moon Titan and investigate the constraints that measurements of 14C might place on Titan's photochemical, atmospheric transport and surface-atmosphere interaction processes. Titan's atmosphere is thick enough that cosmi...
متن کاملHCN fluorescence on Titan
The HCN emission features near 3 μm recently detected by Geballe et al. (2003, Astrophys. J. 583, L39) are analyzed with a model for fluorescence of sunlight in the ν3 band of HCN. The emission spectrum is consistent with current knowledge of the atmospheric temperature profile and the HCN distribution inferred from millimeter-wave observations. The spectrum is insensitive to the abundance of H...
متن کاملCO2 on Titan
A sharp stratospheric emission feature at 667 cm -• in the Voyager infrared spectra of Titan is associated with the •'2 Q branch of CO2. A coupling of photochemical and radiative transfer theory yields an average mole fraction above the 110 mbar level of fco2 1.5 + 2.5 -9 = -o.8X 10 , with most of the uncertainty being due to imprecise knowledge of the vertical distribution. CO2 is found to be ...
متن کاملHydrocarbon lakes on Titan
The Huygens Probe detected dendritic drainage-like features, methane clouds and a high surface relative humidity (∼50%) on Titan in the vicinity of its landing site [Tomasko, M.G., and 39 colleagues, 2005. Nature 438, 765–778; Niemann, H.B., and 17 colleagues, 2005. Nature 438, 779–784], suggesting sources of methane that replenish this gas against photoand charged-particle chemical loss on sho...
متن کاملImpact craters on Titan
Five certain impact craters and 44 additional nearly certain and probable ones have been identified on the 22% of Titan’s surface imaged by Cassini’s high-resolution radar through December 2007. The certain craters have morphologies similar to impact craters on rocky planets, as well as two with radar bright, jagged rims. The less certain craters often appear to be eroded versions of the certai...
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ژورنال
عنوان ژورنال: Nature Geoscience
سال: 2018
ISSN: 1752-0894,1752-0908
DOI: 10.1038/s41561-018-0240-3