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|Title: ||Venus’s Southern Polar Vortex Reveals Precessing Circulation|
|Authors: ||Luz, David|
|Issue Date: ||Apr-2011|
|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.|
|Appears in Collections:||FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
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