&#What happened to the earthquake cloud in Shijiazhuang yesterday? Experts in the first time to dispel rumors is scale cloud, not a precursor before the earthquake, so do not blindly spread rumors. This kind of cloud, which is arranged in order and has a shape similar to fish scale, is called transparent cumulus cloud, which is an atmospheric phenomenon.
The translucent cumulus (altocumulus translucidus), a fish scale like cloud, is a kind of cloud that appears when the strong cold air comes, indicating that the weather conditions are not stable in the near future.
Transparent altocumulus clouds are thin and white. They are usually arranged in one or two directions. There are obvious gaps between the clouds. Even if there is no gap, the edge of the clouds is bright.
Causes of formation
Scale cloud refers to a large range of clouds with regular gaps between them. The appearance of such clouds is a sign that the weather will clear up and there will be a clear sky for two or three days. The reason is that the cold air sinking in the sky broke through the continuous clouds, thus forming the scale cloud. When the cold air sinks to the ground and is heated, the water in the air evaporates, the relative humidity decreases, the air pressure increases, and the cloud layer also rises (key words: the cloud layer is suspended in the fluid of equal density), resulting in continuous sunny days. Such clouds usually appear in autumn. It's also about to show signs of cool autumn.
Clouds floating in the sky are composed of many small water drops or ice crystals, some of which are mixed together. Sometimes it also contains some large raindrops, ice and snow particles. The bottom of the cloud does not touch the ground and has a certain thickness.
From the ground up more than ten kilometers, the closer to the ground, the higher the temperature, the denser the air; the higher the air, the lower the temperature, the thinner the air.
On the other hand, the water surface of rivers, lakes and seas, as well as the water content of soil, animals and plants, evaporates into water vapor in the air at any time. When water vapor enters the atmosphere, it will form clouds and rain, or condense into frost dew, and then return to the ground, infiltrate into the soil or flow into rivers, lakes and oceans. Later, it evaporates (sublimates) and condenses (condenses) again. It goes round and round. When water vapor enters the lower atmosphere from the evaporation surface, the temperature here is high and there is a lot of water vapor. If these hot and humid air is lifted up, the temperature will gradually decrease. At a certain height, the water vapor in the air will reach saturation. If the air continues to be lifted, excess water vapor will be released. If the temperature is higher than 0 ℃, the excess water vapor will condense into small water droplets; if the temperature is lower than 0 ℃, the excess water vapor will condense into small ice crystals. When these small water droplets and ice crystals gradually increase and reach the level that human eyes can recognize, they are clouds.
main features
Scale clouds generally refer to light transmitting and highly cumulus clouds. Generally speaking, before the cold air comes, the clouds gradually thicken and distribute in layers. When the thick clouds' squeeze 'each other, they will appear scale like clouds. According to meteorologists, the scale cloud will become a rain cloud when it accumulates to a certain extent. The weather proverb vividly says: 'fish scale sky, not rain also wind bumps'.
The characteristics of transparent altocumulus are that the clouds are at a relatively high altitude, the clouds are thin and white, and they are usually arranged in one or two directions orderly. There are obvious gaps between the clouds, even if there is no gap, the edges of the clouds are bright, and the positions of the sun and the moon can be distinguished.
It is wavy cloud with clear outline, usually in the shape of flat circle, tile, fish scale, or water wavy dense cloud strip. In groups, in rows and in waves. Most clouds have an apparent width angle of 1-5 degrees. Sometimes it can appear at two or more heights. Thin clouds are white, thick clouds are dark gray. On thin cumulus clouds, there are often irises around the sun and the moon, or rings of red on the outside and blue on the inside.