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Precipitation-induced surface brightenings seen on Titan by Cassini VIMS and ISS

Abstract : Observations from Cassini VIMS and ISS show localized but extensive surface brightenings in the wake of the 2010 September cloudburst. Four separate areas, all at similar latitude, show similar changes: Yalaing Terra, Hetpet Regio, Concordia Regio, and Adiri. Our analysis shows a general pattern to the time-sequence of surface changes: after the cloudburst the areas darken for months, then brighten for a year before reverting to their original spectrum. From the rapid reversion timescale we infer that the process driving the brightening owes to a fine-grained solidified surface layer. The specific chemical composition of such solid layer remains unknown. Evaporative cooling of wetted terrain may play a role in the generation of the layer, or it may result from a physical grain-sorting process.
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https://hal-univ-paris.archives-ouvertes.fr/hal-03657806
Contributor : Sébastien Rodriguez Connect in order to contact the contributor
Submitted on : Tuesday, May 3, 2022 - 12:53:55 PM
Last modification on : Friday, May 6, 2022 - 3:17:43 AM

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Jason Barnes, Bonnie Buratti, Elizabeth Turtle, Jacob Bow, Paul Dalba, et al.. Precipitation-induced surface brightenings seen on Titan by Cassini VIMS and ISS. Planetary Science, Springer, 2013, 2 (1), pp.1. ⟨10.1186/2191-2521-2-1⟩. ⟨hal-03657806⟩

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