Forgive, please, the late, overhasty and not especially informative nature of this post, but I wished to get something up for Earth Day before the opportunity passed. As usual, consider yourself invited to report on your own Earth Day activities in the comments section.
Here in SE Utah, Earth Day opened gorgeously. Warm and blue. To the south, only a few drawn clouds showing, thin as weeds that snow flattened. Around the Abajos to the north rise those striking cloud formations that always provoke my wonder. Can’t remember what they’re called, but I think of them as the “jellyfish formations,” because to my eye they resemble man-of-war jellyfish: small, top-heavy clouds trailing long, wispy tentacles of vapor that appear to dangle into lower reaches of the atmosphere. As I’ve sought to understand those cloud structures, I’ve read what’s actually happening is that the tentacles are water vapor rising out of unstable air, seeking a more settled region of the atmosphere. Once the vapor finds that more stable region it forms a cumulus cloud, which may in turn provide the seed of a cumulonimbus cloud, a thunderhead. Continue reading “Earth Day 2009 (Field Notes #4)”