SO and SO2 In The Venus Mesosphere: Observations Of Extreme And Rapid Variation

Details SO and SO2 In The Venus Mesosphere: Observations Of Extreme And Rapid Variation SO and SO2 In The Venus Mesosphere: Observations Of Extreme And Rapid Variation

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.4508s&link_type=abstract

American Astronomical Society, DPS meeting #39, #45.08; Bulletin of the American Astronomical Society, Vol. 39, p.503

Astronomy and Astrophysics

Astronomy

2

Scientific paper

Measurements of SO2 and SO in the Venus middle atmosphere (70-100 km) reveal extreme, and rapid, global variability of each molecule. Sub-mm (346 GHz) spectroscopic observations since 2004 (made with JCMT - the James Clerk Maxwell Telescope, Mauna Kea, Hawaii) indicate [SO]<<[SO2] in June 2004, [SO]>>[SO2] in Jan2007, and the total [SOx]=[SO]+[SO2] also varies strongly. In Jan2007, global SO tripled in only 6 days. SO and SO2 mixing ratios are much larger at 85-100 km than at 70-85 km. Initial measurements at higher spatial resolution indicate variability can be spatial as well as temporal. SO and SO2 measurements add to the growing body of data depicting the Venus above-cloud atmosphere as a complex and dynamic region. We discuss SOx variability in context of variability found in studies of wind and CO [see talk by Clancy], and of water [Sandor & Clancy. Icarus 177. p129. 2005.]
[We acknowledge the U.S. National Science Foundation for their funding of this project.]

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