A mystery of sulfur clouds of Venus may be solved by new computer model - Space.com

Scientists using new computational methods have come up with a new insight into the potential workings of the complex atmosphere of Venus.

A team of scientists now suggest, following the use of sophisticated computational modeling, a new pathway for creating disulfur — an allotrope of sulfur consisting of two sulfur atoms — within the clouds of Venus.

Disulfur leads to the formation of other sulfur allotropes and, subsequently, cyclic, or ring-structured, molecules of eight sulfur atoms within the Venusian atmosphere.

The team proposes that sulfur dioxide (SO2), broken down by sunlight to form sulfur monoxide (SO) and disulfur monoxide (S2O), provides a much faster pathway to forming disulfur than the combining of separate sulfur atoms.

Using computational methods is very useful in this context, as working with chemicals and compounds found in the Venusian atmosphere, including sulfur, chlorine and oxygen can be difficult and sometimes dangerous.

“For the first time, we are using computational chemistry techniques to determine which reactions are most important, rather than waiting for laboratory measurements to be done or using highly inaccurate estimates of the rate of unstudied reactions,” James Lyons, Planetary Science Institute senior scientist and an author of the paper, said in a press statement (opens in new tab)!

While there is no consensus yet on the identity of the absorber, it's thought very likely that sulfur chemistry is involved.

Triatomic and tetratomic allotropes of sulfur, the latter also forming from disulfur, have been proposed to be the mysterious UV absorber.

The team, also involving scientists from Universitat de València and the Institute of Physical Chemistry Rocasolano in Madrid, Spain, and the University of Pennsylvania, claim computational models, or "ab initio chemistry," used to determine possible reactions could also open the door to using the approach to learn more about the complex chemistry of Venus. .