(Open thread)
(August 2017)
Meteorology:theguardian
theguardian
Global warming is shifting Earth's clouds, study shows
Climate Central: The warming of the planet over the past few decades has shifted a key band of clouds poleward and increased the heights of clouds tops
"mysterious streak of purple light spotted by aurora watchers adds to a growing list of upper atmospheric phenomena. Previously spotted electrical effects have been called elves, sprites and gnomes; the newcomer has the less fairytale name of Steve."
theguardian.
Recipe unearthed for mystery clouds
‘Cotton wool’ clouds above sub-tropical shores unmasked as formations caused by humidity variations high in the sky
The weather forecast had predicted a cloudless day, but when Ilan Koren, an atmospheric scientist, looked up he saw small “cotton wool” clouds dotted across the bright blue sky over Israel.
“Mystery” clouds like these are common on hot sunny days along humid sub-tropical shores, like those along the Mediterranean. Yet classical physics suggests these clouds shouldn’t exist. Now scientists think they might have finally solved the puzzle of how mystery clouds are made theguardian.com
Some cloud types:
Cumulonimbus, from the Latin cumulus and nimbus, is a dense towering vertical cloud associated with thunderstorms and atmospheric instability, forming from water vapor carried by powerful upward air currents.Wikipedia
Nimbostratus is a stratiform genus formerly classified as "Family C" low-level, but now considered by the World Meteorological Organization to be a middle- or multi-level stratus type. Wikipedia
Altostratus is a middle altitude cloud genus belonging to the stratiform physical category characterized by a generally uniform gray to bluish-green and sheet or layer. It is lighter in color than nimbostratus and darker than high cirrostratus. Wikipedia
Cirrus is a genus of atmospheric cloud generally characterized by thin, wispy strands, giving the type its name from the Latin word cirrus, meaning a ringlet or curling lock of hair. Wikipedia
A stratocumulus cloud belongs to a genus-type of clouds characterized by large dark, rounded masses, usually in groups, lines, or waves, the individual elements being larger than those in altocumulus, ... Wikipedia
Cumulus Cumulo- means "heap" or "pile" in Latin. Cumulus clouds are often described as "puffy", "cotton-like" or "fluffy" in appearance, and have flat bases. Wikipedia
The clouds are closely related to undulatus clouds.[3]Although they appear dark and storm-like, they almost always dissipate without a storm forming.[4] The ominous-looking clouds have been particularly common in the Plains states of the United States, often during the morning or midday hours following convective thunderstorm activity..wikipedia
NEWER TYPES:
Mammatus (mamma[1] or mammatocumulus), meaning "mammary cloud", is a cellular pattern of pouches hanging underneath the base of a cloud, typically cumulonimbusrainclouds, although they may be attached to other classes of parent clouds.wikipedia.
Asperitas (formerly known as Undulatus asperatus) is a cloud formation first popularized and proposed as a type of cloud in 2009 by Gavin Pretor-Pinney of the Cloud Appreciation Society. Added to the International Cloud Atlas as a supplementary feature in March of 2017wikipedia.
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More:
Weird, Rare Clouds and the Physics Behind Them
List of cloud types:
wikipedia.
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