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| Titel |
Venus' South Polar Vortex morphology and dynamics from VIRTIS measurements during the Venus Express mission |
| VerfasserIn |
Itziar Garate-Lopez, Ricardo Hueso, Agustín Sánchez-Lavega, Javier Peralta |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250045953
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| Zusammenfassung |
| The VIRTIS instrument onboard VEX observes Venus in two channels (visible and infrared)
obtaining spectra and multi-wavelength images of the planet. Here we present a study of
the variable morphology of the South Polar Vortex, both in the upper and lower
cloud levels, and a dynamical study based on measurements of the wind field in the
vortex retrieved from cloud tracking over an ample set of images and wavelengths
sensitive to different altitude levels. We present results from day-side images of
the vortex obtained at 380 nm and 980 nm, both sensitive to two altitude levels
within the upper cloud (66-70 km), night-side images in the near-infrared (1.74 μm)
sensitive to the lower cloud (48 km), and from thermal infrared (3 – 5 μm) images
sensitive to the cloud tops and able to study both the day and night-side of the planet.
We explore the different dynamics associated to the varying morphology of the
vortex.
Acknowledgements This work has been funded by Spanish MICIIN AYA2009-10701
with FEDER support and Grupos Gobierno Vasco IT-464-07. |
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