[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Large Impacts and Ozone Depletion
A recent article on the New Scientist website briefly reported that small
volcanic eruptions can cause short-term ozone depletion. The study showed
that nitric acid and water vapour in large concentrations can energise
volcanic chlorine so that it reacts with ozone.
It got me wondering: what sort of impact (pun intended) would a large bolide
strike have on ozone depletion? Especially one that landed in the sea -
would impact conditions liberate chlorine from sea water (and send it high
enough to react with the ozone layer)? Or would resulting dust clouds
effectively block out any additional cosmic rays that might find their way
through depleted ozone?
GIS / Archaeologist http://heretichides.soffiles.com
Melbourne, Australia http://www.geocities.com/dannsdinosaurs