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HCN ice in Titan's high-altitude southern polar cloud

Maltagliati, Luca; Vinatier, Sandrine; de Kok, Remco J. +2 more

Titan's middle atmosphere is currently experiencing a rapid change of season after northern spring arrived in 2009 (refs 1, 2). A large cloud was observed for the first time above Titan's southern pole in May 2012, at an altitude of 300 kilometres. A temperature maximum was previously observed there, and condensation was not expected for any of Ti…