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Atmospheric structure and dynamics as the cause of ultraviolet markings in the clouds of Venus

Drossart, Pierre; Piccioni, Giuseppe; Markiewicz, Wojciech J. +4 more

When seen in ultraviolet light, Venus has contrast features that arise from the non-uniform distribution of unknown absorbers within the sulphuric acid clouds and seem to trace dynamical activity in the middle atmosphere. It has long been unclear whether the global pattern arises from differences in cloud top altitude (which was earlier estimated …