The naming table * * * has a total of 140 names, which are provided by the Asia-Pacific region 14 member countries and regions of the World Meteorological Organization, including Cambodia, China, North Korea, China, Hong Kong, Japan, Laos, Macau, China, China, Malaysia, Micronesia, the Philippines, South Korea, Thailand, the United States and Vietnam. Each country or region provides 65,438+00 names.
These 65,438+040 names are divided into 65,438+00 groups, and 65,438+04 names in each group are arranged in alphabetical order according to the English names of member countries, which are recycled in turn, that is, the tropical cyclone nomenclature table of the Northwest Pacific Ocean and the South China Sea. At the same time, the original number of tropical cyclones remains unchanged.
Formation conditions of typhoon
The formation of typhoon requires the following conditions: the sea surface water temperature is above 26.5℃; Initial disturbance of a positive vorticity; The shear of ambient wind in the vertical direction is very small; Low pressure or cloud disturbance is at least several latitudes from the equator. Because people don't fully understand the formation of typhoons now, the above list is only a necessary condition for the formation of typhoons.
The initial stage of typhoon is tropical depression, and it usually takes about 2 days from the initial low-pressure circulation to the maximum average wind force near the center, only three or four days for the slow one and only a few hours for the fast one. In the development stage, the typhoon continuously absorbs energy until the central air pressure reaches the lowest value and the wind speed reaches the maximum value. After the typhoon landed, under the joint influence of ground friction and insufficient energy supply, it will quickly weaken the death.
Refer to the above? Baidu Encyclopedia-Typhoon