1, Zhuge Lu is in Nanyang, and Ting Yun Pavilion is in Xishuzi. Liu Yuxi's Humble Room Inscription; I don't know where Ji Xiang Temple is, so I climbed several miles into the clouds and peaks. Wang Wei's Crossing Ji Xiang Temple
2, the birds fly high, and the lonely clouds go alone. Sitting alone in Jingting Mountain by Li Bo; The cliff rises abruptly from the face of the human face, and the qi rises with the rise of the horse's head. Li Bai's Send Friends to Shu; However, through these clouds, how can I know which corner of the mountain it is facing? . Jia Dao's absence notes.
3, the Spring Festival Evening is beautiful, the rocks are high and the clouds are white. Xie Lingyun's Account in Peng Li. On the west side of the river this night, there was not a cloud in the whole blue sky. Looking at Platinum's Nostalgia from Night Sleeping under Niuzhu Mountain.
Cloud contour
Cloud is a visible polymer floating in the air, which is condensed by water droplets or small ice crystals liquefied by water vapor in the atmosphere when it is cold. Clouds are the tangible result of the huge water cycle on the earth. The sun shines on the surface of the earth, and water evaporates to form water vapor. Once the water vapor is supersaturated, water molecules will gather around the dust (condensation nuclei) in the air.
The resulting water droplets or ice crystals scatter sunlight in all directions, thus forming the appearance of clouds. Moreover, clouds can form various shapes, and they are divided into many kinds because of their different heights and shapes in the sky.
strength grade
The intensity of clouds is measured by the number of clouds (the percentage of clouds in the sky, divided into total clouds and low clouds), which are divided into three grades: the sky is clear without clouds or scattered clouds, but the amount of clouds is less than the sky area110; There are four? 70% of the low-middle clouds are still 6? 10% of the high clouds are cloudy; More than 80% of the medium and low clouds are cloudy.
Classification of clouds
According to the height and shape characteristics of cloud bottom, it is preliminarily divided into ten genera of three high families: three families are high clouds (more than 4.5 kilometers) and medium clouds (2.5? 4.5 km), low cloud (0. 1? 2.5 km); The ten genera are Cirrus, cirrostratus, cirrocumulus, Stratocumulus, Altocumulus, Stratocumulus, nimbostratus, Cumulus and Cumulonimbus. On this basis, it is subdivided into 29 categories according to appearance characteristics, arrangement, transparency and evolution.