Mathematics – Logic
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990esasp.315..159l&link_type=abstract
In ESA, Formation of Stars and Planets, and the Evolution of the Solar System p 159-165 (SEE N91-18922 10-90)
Mathematics
Logic
1
Atmospheric Circulation, Atmospheric Composition, Planetary Surfaces, Stellar Evolution, Titan, Atmospheric Effects, Cassini Mission, Methane, Saturn (Planet), Saturn Atmosphere, Star Formation
Scientific paper
Present understanding of the surface and atmosphere of Saturn's moon Titan indicates that methane in the stratosphere is photolytically converted to higher hydrocarbons at a rate such that a kilometer deep layer of byproducts has accumulated over the age of the solar system. Many of these byproducts, stable as liquids under current conditions, may be part of a widespread, even global, hydrocarbon-methane-nitrogen ocean. The interaction of this ocean with the atmosphere, together with the progressive stratospheric destruction of methane, may have driven a climatic evolution over geologic time which has left its mark in the bedrock, ocean and atmosphere of this unique world. The current state of understanding of these processes is reviewed. The record of surface atmosphere evolution may be found in the ice crust morphology, composition of any surface oceans, and the atmospheric abundances of deuterated species. In each of these areas key observations will be made by instrument complement aboard the ESA/NASA Huygens probe and Cassini orbiter.
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