Hoar frost. Hoar frost-covered silver birch trees (Betula pendula),seen from the forest floor. Hoar frost is formed when moist air above the ground cools rapidly to below freezing point. Needle- like deposits of ice crystals are formed on cold surfaces such as tree branches when water vapour or condensation (dew) freezes. Photographed in the Northumberland National Park,England | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Fraser, Simon |
Taille de l’image : | 4153 px × 3387 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |