Starting from 1959, tropical cyclones (tropical storms and above) that occur in or enter the Pacific Ocean and the South China Sea north of the equator and west of the meridian of 180 degrees every year are numbered in China, and the maximum wind force near the center is more than or equal to 8 (17.2m/s), and they are arranged in order of occurrence.
When the cloud structure and circulation of tropical cyclones in offshore areas are clear, as long as the maximum average wind force near the center is above 7, it will also be numbered. The serial number consists of four digits, the first two digits indicate the year, and the last two digits are the serial numbers of tropical cyclones above storm level in that year.
For example, last year's 13 typhoon "Du Fu" was numbered 03 13, which represented the tropical cyclone 13 that occurred in 2003. Tropical depression and tropical disturbance are not numbered.
Tropical storm 9806 is the sixth tropical cyclone generated in the above-mentioned sea area from 65438 to 0998. When it develops into a strong tropical storm, it is called a strong tropical storm 9806, and when it continues to develop into a typhoon, it is called a typhoon 9806; when it decays into a tropical storm, it is also called a tropical storm 9806; When it decays into a tropical depression or degenerates into an extratropical cyclone, it stops numbering.
For example, Sang Mei was the eighth typhoon in 2006, so we called it Typhoon No.8. ..
The typhoon number in China is for domestic use only. When broadcasting typhoon forecast to foreign countries, the principle of division of labor determined by the World Meteorological Organization shall prevail, and the unified numbering of tropical cyclones in the northwest Pacific by the Japan Meteorological Agency shall prevail.
There is an intergovernmental international organization in the Asia-Pacific region: Typhoon Committee. In view of the confusion in naming tropical cyclones affecting the sea area in various countries and regions in the past, the International Typhoon Committee decided to adopt a unified new name for tropical cyclones in the western Pacific Ocean and the South China Sea from 2000 10, namely 65438+ 1.
There are 140 names in the nomenclature of tropical cyclones adopted by the International Typhoon Committee. Naming method consists of 14 names provided by members of typhoon organization, including animals, plants, astrology, place names, names, mythical figures and jewels.
The name comes from 14 typhoon organizations in Cambodia, China, North Korea, China, China, Hong Kong, China, Macau, Japan, Laos, Malaysia, Micronesia (Federated States of), the Philippines, South Korea, Thailand, the United States and Vietnam. The names are arranged in the order of naming tables and recycled.
Numbering purpose
Typhoon numbering refers to the numbering method of typhoons, and the typhoon numbering in China is only for domestic use. When broadcasting typhoon forecast to foreign countries, the principle of division of labor determined by the World Meteorological Organization shall prevail, and the unified numbering of tropical cyclones in the northwest Pacific by the Japan Meteorological Agency shall prevail.
The naming of typhoon consists of two parts: number and name. The number of typhoons is also the number of tropical cyclones. People want to number tropical cyclones, on the one hand, because a tropical cyclone often lasts for more than a week, and several tropical cyclones may appear in the ocean at the same time. With the serial number, there will be no confusion.
On the other hand, the naming, definition, classification method and determination of the center position of tropical cyclones are different in different countries and methods, even in the same country, they are not exactly the same among different meteorological stations, which often leads to various misunderstandings and confusion in use.