Cumulus congestus clouds over trees. Cumulus clouds often form at cold fronts where the advancing, cool air forces warm air upwards. They typically occur at under 2000 metres altitude. The congestus variety (also known as towering cumulus) can rise to great heights and can develop into cumulonimbus clouds (thunderheads). Photographed near noon, in spring, in southern Berkshire, UK. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / STEPHEN BURT |
Taille de l’image : | 5616 px × 3744 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |