Characterization of Venus' cloud top dynamics using ground-based Doppler velocimetry

Details Characterization of Venus' cloud top dynamics using ground-based Doppler velocimetry Characterization of Venus' cloud top dynamics using ground-based Doppler velocimetry

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..517m&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.517

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Scientific paper

The most relevant aspect of the general circulation of the atmosphere of Venus is its retrograde superrotation. A full characterization of the zonal winds is crucial to understand this motion and the mechanisms that create and maintain it. Here we present results of Doppler velocimetry of Venus made with the UVES (Ultraviolet and Visual Echelle Spectrograph) instrument at ESO's Very Large Telescope, based on high-resolution spectra of visible solar Fraunhofer lines. This method allowed us to simultaneously characterize spatial and temporal variations of the zonal wind in the dayside. The winds retrieved in each observation show an average magnitude consistent with other space and ground-base observations, but with a significant variability in local time (longitude) and in latitude.

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