Morphology and dynamics of the upper cloud layer of Venus

Details Morphology and dynamics of the upper cloud layer of Venus Morphology and dynamics of the upper cloud layer of Venus

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007natur.450..633m&link_type=abstract

Nature, Volume 450, Issue 7170, pp. 633-636 (2007).

Computer Science

38

Scientific paper

Venus is completely covered by a thick cloud layer, of which the upper part is composed of sulphuric acid and some unknown aerosols. The cloud tops are in fast retrograde rotation (super-rotation), but the factors responsible for this super-rotation are unknown. Here we report observations of Venus with the Venus Monitoring Camera on board the Venus Express spacecraft. We investigate both global and small-scale properties of the clouds, their temporal and latitudinal variations, and derive wind velocities. The southern polar region is highly variable and can change dramatically on timescales as short as one day, perhaps arising from the injection of SO2 into the mesosphere. The convective cells in the vicinity of the subsolar point are much smaller than previously inferred, which we interpret as indicating that they are confined to the upper cloud layer, contrary to previous conclusions, but consistent with more recent study.

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