Figure 1.

Candidate features to moist convection in Uranus: (a) A plume-like feature observed by Voyager 2 in 1986 in Uranus’ Southern Hemisphere [54,56]. The arrow signals the direction of rotation and the inset shows details from [54]; (b) The Berg feature observed in 2007 (arrow) [57] with details in the inset; (c) The active northern band with multiple spots observed in 2004 [58,59]; (d) Bright spot observed in 2005 [58]; (e) The brightest spot in Uranus as observed in 2014 [60] with the elongated cloud system with insets showing details; (f ) Cloud cluster in the North Pole observed in 2012 with details shown in the inset [61]. North is up in all the images. (a–d) Colour composite images based in visible to near-infrared wavelengths below 1 μm with bright features in wide methane absorption bands. Panel (e) from images in band H (1.6 μm) with insets using a combination of near-infrared images in bands H (blue), a CH4S filter ($1.53-1.66\hspace{0.17em}\text{μ}\text{m}$, green) and K’ (2.2 μm, red), being the latter the most sensitive to high clouds. Panel (f ) shows observations in band H. (Online version in colour.)