The Wave

15 December 2018 – I have not yet joined the Cloud Appreciation Society, but, more and more, I appreciate the clouds that form the final dimension in my city/mountains/sky view to the north.

Especially this morning.

I really did have to blink, wonder if my eyes were correctly processing what lay before them.

I have never seen clouds like this, I muttered to myself. What’s going on?

Asperitas (aka Undulatus Asperitas) is what’s going on, I learned on the evening news, and — according to the UK Met Office — it is indeed “a distinctive and relatively rare cloud formation.”

Everybody agrees the name makes sense: the clouds look like great undulating waves. There is less agreement on why or how they form. As the Met Office puts it, it is a subject of “much debate and confusion,” with one theory suggesting they form when “mammatus clouds descend into areas of sky where the wind direction changes with height, causing the wave-like movement.”

They are also the newest (2017) addition to The International Cloud Atlas, which is the bible of cloud classification, published by the World Meteorological Organization in Geneva.

Thank you, WMO, but the credit really goes to the CAS (Cloud Appreciation Society — but you know that by now, don’t you). It launched a campaign for recognition back in the mid-first decade of this century, and just never let up.

 

  • WALKING… & SEEING

    "Traveller, there is no path. Paths are made by walking" -- Antonio Machado (1875-1939)

    "The voyage of discovery is not in seeking new landscapes, but in having new eyes" -- Marcel Proust (1871-1922)

    "A city is a language, a repository of possibilities, and walking is the act of speaking that language, of selecting from those possibilities" -- Rebecca Solnit, "Wanderlust: A History of Walking"

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