Cumulus congestus cloud. Cumulus clouds typically occur under 2000 metres altitude. They form from water vapour in rising columns of air which condenses as it cools. Cumulus clouds often form at cold fronts where the advancing, cool air forces warm air upwards. The congestus variety (also known as towering cumulus) can rise to great heights and can develop into cumulonimbus clouds (thunderheads). Photographed on a late afternoon in April over Berkshire, UK. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Stephen Burt |
Taille de l’image : | 5368 px × 3579 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |