What is the reason for the sultry weather in typhoons?
The air pressure in the center of the typhoon is low, while the air pressure in the surrounding areas is relatively high. The two form a pressure difference, and the airflow flows from low pressure to high pressure. Downdrafts prevail in the high pressure area, and the weather is clear. And because the water vapor is sucked away by the typhoon, it causes sultry weather.
Typhoon (English: 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". Our country divides tropical cyclones in the South China Sea and the northwest Pacific into six levels based on the maximum average wind force (wind speed) near the bottom center. Those with wind speeds of level 12 or above near the center are collectively called typhoons.
Broadly speaking, the word "typhoon" is not a tropical cyclone intensity. Tropical cyclones (including tropical storms, severe tropical storms and typhoons defined by the World Meteorological Organization) with a central sustained wind speed of 17.2 meters per second or above are all called typhoons. Informally, "typhoon" even refers to the tropical cyclone itself. When a tropical cyclone in the northwest Pacific reaches tropical storm intensity, it is given a name. Names are provided by 14 countries and regions on the World Meteorological Organization's Typhoon Committee. ?
According to statistics from the U.S. Navy’s Joint Typhoon Warning Center, the number of typhoons in the Northwest Pacific and South China Sea from 1959 to 2004 is related to the month. There are an average of 26.5 typhoons per year, with the most typhoons occurring in The month is August in the Gregorian calendar, followed by July and September.
In July 2020, there were no typhoons in the northwest Pacific and the South China Sea. This was the first time China had an "empty typhoon" in July since 1949.
At 10:00 on April 30, 2021, after consultations between the China Meteorological Administration, the Macao Geophysical and Meteorological Bureau, the Hong Kong Observatory and the Taiwan Meteorological Department, the 53rd session of the ESCAP/WMO Typhoon Committee was officially announced. The six new typhoon names passed by the meeting resolution are "Yinxing", "Koto", "Ragasa", "Nongfa", and "Nokaen" and 'Bamboo Grass (Co-may)'.