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Abstract: We report the observation of a cloud system on Titan that remained localizednear 40S latitude and 60W longitude for at least 34 hours. Ground-basedobservations obtained with the SINFONI imaging spectrograph at the Very LargeTelescope over 4 consecutive nights recorded the lifetime and altitude of theunresolved cloud system. Concomitant measurements made by Cassini-VIMS over 3hours resolved changes in the altitude and opacity of individual regions withinthe system during this time. Clouds are measured from 13 to 37 km altitude withoptical depths per pixel ranging from $\tau$=0.13 to 7. Short timescale risetimes are consistent with previous measurements of the evolution ofmid-latitude clouds; however the long timescale localization of the cloudstructure is unexplained. We speculate about the role of meso-scale circulationin relation to cloud formation.



Author: Máté Ádámkovics, Jason W. Barnes, Markus Hartung, Imke de Pater

Source: https://arxiv.org/



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