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Wind speeds in Venus's cloud layers

Wind speeds in Venus's cloud layers


Date: 18 September 2008
Satellite: Venus Express
Depicts: Wind speeds at three altitudes based on VIRTIS data
Copyright: A. Sánchez-Lavega et al. 2008

These two graphs show the averaged wind speeds in the southern hemisphere of Venus as a function of latitude for both the zonal winds, U (A, left) and meridional winds, V (B, right). The spatial and temporal averages of the wind speeds are derived from VIRTIS data recorded between April 2006 (arrival of Venus Express at Venus) and July 2007.

The three curves in each graph show the wind speed in three different altitude ranges in the cloud layers. These were derived by tracking the movement of cloud features at three different wavelengths:

Colour Lambda
(μm)
Altitudes
(km)
Atmospheric Region

Blue

0.38 62-70

Top of upper cloud layer

Purple

0.98 58-64

Base of upper cloud layer

Red

1.74 44-48

Lower cloud layer

Error bars for the 0.98 μm profile are not drawn for clarity but are similar to the other profiles.

Last Update: 1 September 2019
18-Oct-2021 23:41 UT

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