What's the difference between white clouds and dark clouds?

White clouds are white, easy to blow away, with low water content, thick clouds or cumulonimbus clouds.

Baiyun refers to the aggregation of water droplets or gas or ice crystal colloid that stays in the atmosphere. Clouds are the tangible result of the huge water cycle on the earth. Fish scale cloud refers to a large-scale cloud with regular large gaps between clouds. The appearance of this cloud means that the weather will clear up in two or three days.

Signs of clear skies in Wan Li in the park. The reason is that the cold air at high altitude sinks, breaking through the continuous clouds and forming fish scale clouds. When 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 clouds also rise (key words: clouds are suspended in a fluid with equal density.

) thus a continuous sunny day appears. This kind of cloud usually appears in autumn. There are also signs of crisp autumn. Clouds floating in the sky are made up of many tiny water droplets or ice crystals, some of which are mixed together. Sometimes it also includes

Some big raindrops, ice and snow particles, and the bottom of clouds do not touch the ground and have a certain thickness. More than ten kilometers from the ground, the closer to the ground, the higher the temperature and the denser the air; The higher the altitude, the lower the temperature and the thinner the air.

There are many kinds of dark clouds, such as layered clouds, isolated cumulus clouds and wave clouds. Thick layered clouds, or cumulonimbus clouds, the light from the sun and the moon is difficult to transmit, and the clouds look black; Slightly thinner layered clouds and wave clouds look gray, especially in wave clouds, and the edges of the clouds are even grayer.

Extended data:

Judging from the formation process of clouds, if they don't float from other places, then the dark clouds must come from white clouds. White clouds can not only come from other places, but also change from dark clouds, and can also be suddenly "created" on the background of clear skies in Wan Li. Summer surface water

The rapid evaporation under the scorching sun makes the air more and more humid. The temperature at high altitude is lower than the surface temperature, so water vapor first reaches saturation and supersaturation at high altitude. There will always be some dust in the sky, which will become the condensation center, making saturated steam and supersaturated steam condense into fine particles.

Fog drops, when the density is large enough, become white clouds visible to the naked eye. When the fog drops get bigger and bigger, the white clouds turn into dark clouds. The water drops in the dark clouds continue to get bigger and become raindrops; After the rain, the air humidity becomes smaller, the water vapor returns to unsaturated state, and the water droplets in the dark clouds

It began to evaporate, and the volume became smaller and smaller, which made the dark clouds become white clouds; The water droplets in the white clouds continue to evaporate. Once they all evaporate, the white clouds disappear and the sky reappears.