Friday, March 17, 2006

Pendulous condensates:

No, it's not the subject line from junk mail, but an obscure reference to an atmospheric condition.

A friend sent me this link to a set of spectacular photographs of mammatus clouds - which are the best I have seen.

Within the same week, I read this news release from the Geological Society of America, talking about a new form of ash plume over an Ecuadorean volcano. Although the article does not explicitly say it, they are describing volcanic mammatus.

I would bet there are some slight differences in the dominant wavelengths because of density differences between regular cloud and an ash-steam mix, but the "hundreds of meters" wavelength looks about right for the Nebraska photos.

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