red750 Posted September 2, 2018 Share Posted September 2, 2018 Couldn't find an appropriate forum, so here will have to do. I received these images among a number of others on various subjects. No explanation or details. [ATTACH]37058[/ATTACH] [ATTACH]37055[/ATTACH] [ATTACH]37056[/ATTACH] [ATTACH]37057[/ATTACH] Link to comment Share on other sites More sharing options...
old man emu Posted September 2, 2018 Share Posted September 2, 2018 What a beautiful thin a cirrus cloud is (top left). Ice crystals in cirrus clouds mostly form by condensing on seed particles rather than freezing straight from the water vapour. It also seems that cirrus are fussy – not just any particle will do. The majority of crystals, 61 per cent on average, form around two types of seed that account for less than 1 per cent of the particles found at the altitudes where cirrus form. These are the fine mineral dust from sources such as deserts, and tiny specks of metals including lead, zinc, tin, copper and silver. Very few cirrus ice crystals condense around the sulphates and soot that are more abundant at that altitude and are common seeds for clouds at lower elevations. The water vapour is more likely to stick to and freeze on minerals and metals than the sulphates and carbon particles that are also floating around. This could be because their crystalline structures are full of small cracks where ice crystals form easily. Beautiful as they are in macro-form, and full of metal in micro-form, cirrus clouds have a sinister side. Cirrus clouds trap heat, so they play a role in global warming. Link to comment Share on other sites More sharing options...
Soleair Posted September 2, 2018 Share Posted September 2, 2018 The second picture is of 'mammatus' or 'mammatocumulus' clouds. These usually hang from cumulonimbus clouds, as seen in the pic you show. And yes, they are named from the Latin after their similarity to a pendulous breast :) Bruce Link to comment Share on other sites More sharing options...
Soleair Posted September 2, 2018 Share Posted September 2, 2018 The third pic I can only assume is the face of God, as touched by those who dance on laughter-silvered wings (sorry Mr Magee. . .) Link to comment Share on other sites More sharing options...
old man emu Posted September 2, 2018 Share Posted September 2, 2018 The third pic I can only assume is the face of God, I bet that scared the Hell out of the Southern Baptists of the Bible Belt. Link to comment Share on other sites More sharing options...
Steve L Posted September 2, 2018 Share Posted September 2, 2018 heres a couple about 60ks east of Ayres Rock on the 5th Nov 17 [ATTACH]37067[/ATTACH] [ATTACH]37066[/ATTACH] Link to comment Share on other sites More sharing options...
xair1159 Posted September 3, 2018 Share Posted September 3, 2018 Have a look at The Cloud Appreciation Society website. Link to comment Share on other sites More sharing options...
red750 Posted September 16, 2018 Author Share Posted September 16, 2018 Asperatus clouds over New Zealand. [ATTACH]37121[/ATTACH] Link to comment Share on other sites More sharing options...
red750 Posted December 9, 2018 Author Share Posted December 9, 2018 The sky at 9:15 tonight. Looking south, not west. [ATTACH]37681[/ATTACH] Link to comment Share on other sites More sharing options...
Akromaster Posted December 10, 2018 Share Posted December 10, 2018 Saw santa on the horizon on Sunday. [ATTACH]37682[/ATTACH] Link to comment Share on other sites More sharing options...
old man emu Posted December 11, 2018 Share Posted December 11, 2018 Hope his airways clearance was in order. Link to comment Share on other sites More sharing options...
red750 Posted March 28, 2019 Author Share Posted March 28, 2019 Some more stunning cloud and related photos. [ATTACH]38487[/ATTACH] [ATTACH]38488[/ATTACH] [ATTACH]38489[/ATTACH] [ATTACH]38490[/ATTACH] [ATTACH]38491[/ATTACH] Link to comment Share on other sites More sharing options...
eightyknots Posted March 29, 2019 Share Posted March 29, 2019 Some more stunning cloud and related photos. [ATTACH]38968[/ATTACH] [ATTACH]38969[/ATTACH] [ATTACH]38970[/ATTACH] [ATTACH]38971[/ATTACH] [ATTACH]38972[/ATTACH] Stunning!! Link to comment Share on other sites More sharing options...
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