Speaking of typhoons, everyone should be familiar with them, such as the familiar typhoons "Parrot", "Mikra", "Hagupit", "Lekima", etc. Typhoons have strong destructive power, and some typhoons will cause great property losses and certain personal safety problems to the people after landing.
So what exactly is a typhoon, and why is it named? A typhoon is a type of tropical cyclone. Strictly speaking, it is a powerful tropical weather system. Most typhoons occur on tropical oceans. Typhoons may only occur when the ocean surface temperature is equal to or greater than 26.5 degrees Celsius.
In our country, tropical cyclones are divided into six levels based on wind speed. Only those with wind speed of level 12 or above can be called typhoons (some people will call typhoons "Grumpy Boy"). "). Typhoons are subdivided into three levels: super typhoons, severe typhoons and typhoons. The wind speeds are ≥16, 14~15, 12~13.
Typhoons were called hurricanes in ancient times, but they have different names in modern times. In fact, before 2000, there was no unified naming of typhoons around the world. Later, in order to facilitate recording and reporting, the World Meteorological Organization decided to use a unified method to name typhoons.
In 1997, the World Meteorological Organization held a symposium and decided to name typhoons with Asian characteristics for typhoons in the northwest Pacific and South China Sea. Relevant departments designated 14 member states and regions to provide 10 names each, totaling 140 names, to name the typhoon in sequence.
The generated typhoons will adopt the names in this sequence and then use them in a cycle. Therefore, there is a phenomenon that the same "name" of typhoon is used multiple times. Speaking of which, we have to mention one thing, that is, the names of some typhoons will be removed.
As for why it needs to be removed from the list, it is because the typhoon caused certain casualties or caused huge property losses to the people. It is considered unlucky, so it needs to be removed from the list. For example, the previous Typhoon Haiyan was eventually removed from the list because it caused heavy casualties and property losses. However, after delisting, new names will be added, such as "Haiyan", which was replaced by "White Deer", so the number of typhoon names will always remain at 140.
Typhoons are indeed very destructive and pose a certain threat to people's lives and property. But typhoons also have certain positive effects. Typhoons can bring some fresh water resources to humans, which can effectively alleviate water shortages around the world and benefit humans.