Typhoon No.20 was generated this year. How was this typhoon generated?
Typhoon is a special weather phenomenon. From the evolution of the earth to today, typhoons generated anywhere on the earth may develop into rainstorms and storm surges. This has a great impact on people's lives and property safety, so it is often called? Unstable and disastrous weather? . ?
Typhoon No.20 this year? Shana? Generate.
On the east side of the Philippines, the center of Typhoon Shana, which is generated by tropical depression, is located about 485 kilometers southeast of Eguanbi, Taiwan Province Province, with latitude 18.7 degrees north and longitude 124.0 degrees east. With the increase of high-pressure system, the convective activity is enhanced, thus forming strong convective weather and gradually forming a strong typhoon, with strong moving speed and intensity. ?
Formation process of tropical cyclone
Typhoon is a special weather phenomenon evolved from tropical cyclone. In tropical cyclones, it is usually possible to form stronger tropical storms. The formation process of tropical cyclones needs to be influenced by several main weather systems: tropical low pressure system, high pressure system and subtropical high pressure system. Among them, the low-pressure system is formed by the westward movement or eastward development of powerful water vapor clouds on the ocean, while the low-pressure system is a high-pressure system formed on the ocean and land.
Weather environment during the formation of typhoon
When the water vapor in the earth's ocean and atmosphere reaches a certain level, under the action of warm and humid airflow, cyclones will form on the sea surface near the ocean. The formation conditions of cyclones are very complicated, but they all exist in the atmosphere? Thermal convergence zone? The concept of. When the altitude is controlled by the high-pressure ridge, there is cold air near the high-pressure ridge to continuously transport heat, and the hot air rises faster than the cold air, resulting in convection between the surrounding air and the ground air. In the process of this mixed movement, vertical wind shear is produced because the jet downward at high altitude moves downward at vertical speed under the action of airflow. The vertical wind shear process will lead to the decrease of wind speed or the increase of updraft, which will lead to the increase of downdraft. In the downflow, there will also be updraft to bring clouds when sinking, and sometimes even a typhoon will be formed.