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Title: Venus’s Southern Polar Vortex Reveals Precessing Circulation
Authors: Luz, David
Berry, David
Piccioni, Giuseppe
Drossart, Pierre
Politi, Romolo
Wilson, Colin
Erard, Stéphane
Nuccilli, Fabrizio
Keywords: Venus
Issue Date: Apr-2011
Publisher: Science
Citation: Science, 332, 577-580, 2011
Abstract: 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 have a constantly varying internal structure, with a center of rotation displaced from the geographic south pole by ~3 degrees of latitude and that drifts around the pole with a period of 5 to 10 Earth days. This is indicative of a non symmetric and varying precession of the polar atmospheric circulation with respect to the planetary axis.
Type: article
Appears in Collections:FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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