Pileus and cumulus congestus clouds, seen from an aircraft over Malaysia. Pileus clouds occasionally form above rapidly growing convective clouds, and result from the rapid lifting of a layer of moist air around the edge of the main convective cloud. The smooth texture contrasts with the lumpy, cauliflower-like surface of the cumulus tower. 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 in the late afternoon in May, at an altitude of around 12, 000 metres over the coastline near Penang, Malaysia. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / STEPHEN BURT |
Bildgröße: | 5120 px × 6827 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |