92 Accesses. Erratum: The methane cycle on Titan. An understanding of the source–sink cycle of methane is thus crucial to the evolutionary history of Titan and its atmosphere. The cycle of methane on Titan is often considered to be similar to Earth’s hydrological cycle, complete with surface evaporation, cloud formation, and precipitation, although on quite different seasonal and dynamical time scales. Metrics details. 0 Altmetric. However, unlike water on Earth, methane plays a critical role in maintaining Titan’s very atmosphere (of nitrogen). These depression seem to have exited in this form before being filled with dark material, and do not show clear evidence of erosion. Fifteen dark patches are in relatively steep-sided, rimmed, circular depressions, in contrast with other dark patches that exhibit no such topography at this scale. We further suggest that although photochemistry leads to the loss of methane from the atmosphere, conversion … 2008 . Mais malgré cela, Titan est un monde peu approprié à être visité du fait de l'absence totale d'oxygène dans l'atmosphère et de la température extrêmement basse. On the basis of morphology, the south pole clouds are convective and could be precipitating. The methane cycle on Titan. Ce cycle du méthane sur Titan ressemble en partie au cycle de l'eau sur Terre. Jonathan Lunine & Sushil Atreya Nature Geoscience volume 1, page 335 (2008)Cite this article. Titan is the only place in the solar system, other than Earth, that is known to have an active hydrologic cycle. 7 Citations. 1. Nature Geoscience. In this paper we propose that a complex photochemical–meteorological–hydrogeochemical cycle of methane operates on Titan. The methane-based hydrologic cycle on Saturn's largest moon, Titan, is an extreme analogue to Earth's water cycle. Despite Titan's cold temperatures (about 93.7 K at the equator), fluvial and atmospheric processes are active on this moon of Saturn, with methane playing a similar role to water on Earth. Scientists think methane is at the heart of a cycle at Titan that is somewhat similar to the role of water in Earth's hydrological cycle - causing rain, carving channels and evaporating from lakes. CH 4 rain is thermodynamically allowed anywhere in today’s Titan atmosphere. Titan is the only other place in the solar system besides Earth that has stable liquid on its surface. Some Titan GCMs suggest that seasonal clouds should form above 70 o latitude, though whether they will precipitating is unknown. Vol. Titan’s Methane Cycle. Le pôle Nord connaît beaucoup de précipitations - probablement de méthane ou d'éthane - en hiver.