Typhoon in English
Typhoon in English: typhoon.
Typhoon is a type of tropical cyclone. A tropical cyclone is a low-pressure vortex that occurs on the tropical or subtropical ocean. It is a powerful and deep "tropical weather system". China divides tropical cyclones in the northwest Pacific into six levels based on the maximum average wind power (wind speed) near the bottom center. Those with wind speeds of level 12 or above near the center are collectively called typhoons.
Typhoons often bring violent winds, heavy rains and storm surges, which not only bring disasters to mankind, but also bring benefits to mankind. Typhoons bring abundant freshwater resources to mankind, which is of great significance for improving freshwater supply and ecological environment.
Typhoons also maintain a relative balance of heat and cold in various parts of the world; the climate in the equatorial region is hot. If typhoons had not dissipated the heat, the tropics would be hotter, the frigid zones would be colder, and the temperate zones would disappear from the earth. The word "typhoon" is said to have evolved from the Cantonese word "big wind", and another said to have evolved from the Hokkien word "wind platform".
According to the definition of the World Meteorological Organization, tropical cyclones with central winds generally reaching level 12 or above and wind speeds reaching 32.7 meters per second can be called typhoons (or hurricanes). When a tropical cyclone reaches tropical storm intensity, it is given a specific name. Names are provided by 14 countries and regions on the World Meteorological Organization's Typhoon Committee.
The following conditions need to be met for the formation of a typhoon:
1. There must be a broad atmosphere with high temperature and high humidity, and the sea temperature should be higher than the warm ocean surface of 26℃-27℃.
2. There must be an original vortex, so that in the early stages of the formation of a typhoon, the surrounding airflow will not flow directly into the center of the low vortex, causing it to quickly fill up and disappear.
3. In typhoon-generating areas, the difference in wind direction and speed between high and low altitudes is small.
4. With a large enough geostrophic deflection force, the earth's rotation acts as a typhoon structure, which is conducive to the generation of cyclonic vortices.