Frost-covered trees and Glastonbury Tor. Hoar frost covering three willow (Salix sp.) trees in a field on a farm. St Michael's Tower can be seen on the summit of Glastonbury Tor in the background. Hoar frost results when heat is lost through radiation into the open sky on cold clear nights,causing objects to become colder than the surrounding air. This temperature difference causes the water in the warmer air to condense on the colder objects and then freeze into small ice crystals. Photographed in Somerset,England,UK,in December | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Shaw, Duncan |
Bildgröße: | 4288 px × 2848 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |