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Re: New Paper about Selectivity of Cretaceous-Paleogene Extinctions

> Would ground-level O3 concentrations have been just as high
> in mountainous areas? It's hard to 
> believe that no non-avian dinosaurs lived at any decent
> altitude. 
> That's all assuming that the atomic mass of O3 was great
> enough for it to settle downwards 
> towards sea level. CO2 concentrations apparently vary with
> altitude during colder months, but are 
> relatively uniform during the warmer months.

Haven't read the new paper, but it seems they're discussing the amount of O3 
that was distributed across (most of) the globe during the first week or few 
weeks post-impact. At least the abstract discusses acute, not chronical 
toxicity of O3.



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