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Venus’s Southern Polar Vortex Reveals Precessing Circulation

Erard, S.; Drossart, P.; Piccioni, G. +5 more

Initial images of Venus’s south pole by the Venus Express mission have shown the presence of a bright, highly variable vortex, similar to that at the planet’s north pole. Using high-resolution infrared measurements of polar winds from the Venus Express Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) instrument, we show the vortex to hav…