In the original Letter, owing to a typesetting error, an author name from the ACS Science Team was incorrect: the surname of author Cathy Quantin-Nataf was misspelled ‘Quantin-Nata’. In addition, authors Ehouarn Millour and Roland Young were inadvertently missing from the ACS Science Team list. They are associated with Laboratoire de Météorologie Dynamique (LMD), CNRS Jussieu, Paris, France. Furthermore, the surname of Armin Kleinböhl was mispelled as Kleinbohl. Finally, the details for the Jet Propulsion Laboratory affiliation have been corrected. The original Letter has been corrected online.