You can muffle the drum, and you can loosen the strings of the lyre, but who shall command the skylark not to SING? Kahlil Gibran | Do you walk with your back to the sun seeing only shadows or do walk facing the sun?
‘Chiaroscuro’ is the technique developed by artists in the Renaissance – Leonardo da Vinci, Carravagio and Rembrandt in particular – that uses strong contrasts of light and dark tones to heighten the drama of a painting. Now where, we wonder, did they get that idea?
Cumulus and Cumulonimbus, spotted at sunset off the coast of Pagedongan, Banten, Indonesia by Nizma Arifin (Member 36,177).
The photos that appear on our Instagram account are those that are submitted on our Cloudspotter app, but because our followers on Instagram spot some great skies we would love to share these also! DM us your cloud photos and don't forget to mention where they were taken!
A rainbow spotted over Utah, US, by @carey_pierce#cloudappreciation#cloudspotting#instagram#clouds#cloud#rainbow
Noctilucent clouds, whose name means ‘night-shining’, are the most mysterious clouds. They were first recorded in 1885, when they were noticed following the eruption of Krakatoa, which sent vast quantities of ash into the atmosphere. They occur only in the summer months, which means that we are now in the season for spotting noctilucent clouds in the Northern Hemisphere. They are the highest clouds on Earth, forming up in the mesosphere at altitudes of around 50 miles / 85 km. The cloud’s ice crystals seem to form only in regions higher than 50° latitude, and they are believed to freeze around particles of dust that originated from meteors breaking up in the upper atmosphere. It still a mystery as to how enough moisture reaches this part of the atmosphere to produce the ice, since it is in fact extremely dry. One thing we know for sure is that they are a rare and magical sight for lucky cloudspotting night owls.
Noctilucent clouds spotted by Pablo Alvarez on a flight over Luxembourg.
21 1,07621 June, 2019
Lenticularis clouds can appear sometimes like a stack of plates. The striking arrangement of celestial crockery results, like all lenticularis clouds, from the airflow rising and dipping in standing waves in the lee of the peaks of mountains or hills. What makes it different from the individual discs of a more standard lenticularis cloud is the stratified nature of the flowing air. Alternating layers of moister and dryer air flow in unison. Where this invisible flow rises as a crest and cools, the moisture-laden layers produce more extensive cloud than the drier ones in between. The stack-of-plates form of lenticularis is known by the term ‘pile d’assiettes’, which is of course French for ‘your turn to wash the dishes’.
The pile d’assiettes form of Altocumulus lenticularis spotted over Mono Lake on the eastern side of the Sierras Nevada mountain range of California US by Robert Rosenbaum (Member 47,381).
3 1,36612 July, 2019
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