Long term changes in Venus sulfur dioxide |
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Authors: | LW Esposito |
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Institution: | Laboratory for Atmospheric and Space Physics and Department of Astrophysical, Planetary and Atmospheric Sciences, University of Colorado, Boulder, CO 80309, U.S.A. |
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Abstract: | Pioneer Venus data from the first 5 years of operation show a decline by more than a factor of ten in SO2 at the cloud tops. A consistent decline has also recurred in the amount of sub-micron haze above the clouds. The correlation between these two observables is 0.8 over this period. A plausible explanation is injection of SO2 from episodic volcanism. The episodic behavior implies that steady state models of the Venus cloud chemistry and dynamics may be of limited use. |
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