| Popis: |
Noctilucent clouds are the highest clouds on Earth, and are located in the coldest part of planet Earth, the high-latitude summertime mesopause region (80–90 km). Composed of water-ice particles, they are nucleated by meteoric smoke particles. This article discusses brief history since their discovery in 1885, occurrence patterns, the nature of the cold mesopause, methods of active and remote sounding, polar mesospheric summertime radar echoes, theory and modeling of mesospheric ice, and long-term changes of mesospheric ice clouds, possibly related to upper atmospheric climate change. |
