Marshmallow?brocoli?How is a "hot thunderstorm" formed

On the afternoon of June 21, friends in Wuhan discovered a cloud like marshmallow in the sky. Some friends exposed the photos to the circle of friends: "Today's clouds look delicious."

Huang Zhimin, an agricultural meteorological expert in Hubei Province, said that the marshmallow cannot be eaten, and there will be a "hot thunderstorm".

At around 20-21 on June 20, a mid-or large thunderstorm was reduced in Jingzhou City. The rainfall reached 14.0-31.6 mm in about 2 hours. It is a "hot thunderstorm".

How is "hot thunderstorm" formed?

Huang Zhimin said that the main reason is that the ground began to be heated after the sunrise, and continuously accelerated to the air radiation heat of the near -strata in the form of long wave radiation. Based on the height of the ground to the height of the ground, the temperature decreased (the temperature of the flow layer usually dropped by about 0.65 ° C every 100 meters). When this kind of warm and humid air is enriched to a certain degree, water vapor will be condensed into small water droplets in a certain air group to form a cloud layer. As the thermal power of the surface continues to rise, there will be cold and heavy cold air sinking above. Essence

After reaching hundreds of meters in the air, at a certain condensation height, the first thing that is formed is a light -like cloud -like cloud. As the air rising rising movement enhances, the vigorous development of the ceiling is strong. Its broccoli -shaped Genting began to be ice crystal, and the original clear edge contour also began to become blurred in some parts and dark at the bottom.

When this cloud reaches a height of thousands of meters, it forms a rainy cloud with existing water droplets, excessive cooling water droplets and ice crystal structures. When the small water droplets in the accumulated rain clouds continued to collide and merge into a larger small water droplet, they began to land, and the hot air rising from the ground continued to rush up. After rubbing between the two, the charges were brought with.

Huang Zhimin said that the rising airflow belt positive charge, and the drop of water droplets with a negative charge. Over time, a large number of positive charge accumulated on the top of the Yiyun Cloud, but the bottom accumulated a lot of negative charge. The ground also brought a positive charge due to the induction of the negative charge at the bottom of the rain cloud. The water droplets in the clouds increased until the rising air could not hold it, and it fell directly from the clouds. The charge in the air also discharged from time to time, accompanied by a thunderous thunder. This "hot thunderstorm" mostly happened in the summer afternoon and evening.

Based on the "hot thunderstorm" in summer, not only the precipitation is sudden, the rain is heavy, and the precipitation is concentrated. Sometimes it will be accompanied by a strong wind. The agricultural should pay attention to the prevention of waterlogging; The crops are upside down; thunder and lightning will also endanger the safety of people and related facilities, especially farmers who work in Tianye to strengthen prevention. (Science and Technology Daily)

- END -