title: Venus: further evidence of vortex circulation.
abstract: A space-time composite of polar stereographic ultraviolet images of Venus from Mariner 10 shows a remarkable circumpolar vortex. The vortex is characterized by a cloud which appears similar to dense terrestrial stratus having an albedo that is 50 percent higher. Spiral streaks converge into it from low latitudes, akin to the spiral bands of a hurricane. The bright visible polar cloud is not axisymmetric but has roughly an elliptical shape. The high brightness of the polar cloud suggests that it has a different origin from the rest of the Venus cloud cover.
authors.forename: V E
authors.initials: VE
authors.lastname: Suomi
authors.forename: S S
authors.initials: SS
authors.lastname: Limaye