Japan will have multiple typhoons approaching or even landing in summer and autumn every year, creating disasters in various parts of Japan. This time, the uncle is coming to popularize the characteristics of typhoons in Japan, the easy-to-came regions and time, and the impacts caused by typhoons, as well as several entertainments that can still relieve worries and boredom when encountering typhoons. Whether it is tourists who are going to travel to Japan in the future, or those who are already in Japan, they are very useful. In order to be able to remain calm when encountering situations in Japan, you might as well remember more knowledge!
The predecessor of the typhoon is called a tropical depression in meteorologically. A tropical depression with an average maximum wind speed exceeding more than 17 meters per second in the Northwest Pacific or the South China Sea within 10 minutes is called a typhoon. Internationally, the tropical depression with an average wind speed of more than 33 meters per second within one minute is called Typhoon, and other countries have some different names for tropical depressions. It is called cyclones in the Indian Ocean and the South Pacific Ocean, and the Eastern Pacific Ocean and Atlantic Ocean, which are 180 degrees east longitude north of the equator are called hurricanes.
The generation of typhoons is most easily affected by the temperature of sea water. As long as the water vapor evaporates and rises from the warm sea surface, it will form convection choleraimbus cloud . If the surrounding air becomes warm due to the heat during the formation of choleraimbus clouds, the range of choleraimbus clouds will become even larger and eventually form a tropical low pressure. In other words, tropical depressions are easily generated in warm areas throughout the year. According to data from the Japan Meteorological Agency, there were an average of about 26.4 typhoons in each year between 1951 and 2009, of which 11.5 typhoons will approach and 2.9 will land on Japan's territory during the year.
Because the generation of typhoons is closely related to the temperature, the warmest July to October in the northern hemisphere is the time when the number of typhoons is the most generated. Usually, typhoons generated in low latitudes in late spring will move westward, that is, Philippines . In summer, typhoons will also generate in areas with relatively high latitudes, moving northward around the Pacific high pressure, and the chances of moving towards Japan will also increase.
Typhoon moves according to the flow of the wind rather than moving forward on its own, so the direction of travel and route will be changed due to the air pressure position around Japanese archipelago . The typhoon that can most affect the approaching to Japan is Ogasawara air mass on the west side of the Pacific high pressure. Because the typhoon will move around the Ogasawara air mass, the typhoon that has not yet developed in June may be westward, and most of them will not approach Japan and move towards the Philippines.
However, from July to August, since the Ogasawara air mass will cover most parts of Japan, the typhoon will advance along the edge of the Ogasawara air mass, that is, close to Kyushu and Okinawa, and may also pass through the Japanese archipelago. In October, the Ogasawara air mass will shrink and the typhoon will travel northward from the sea next to Japan. Because the entrainment energy of typhoons is very large, they naturally cause many natural disasters, including heavy rain, storm, mad dog waves, floods, soil and rock flows and other disasters. Even in urban areas, it may cause disasters due to storms and peeling of exterior walls of buildings.
2018 Typhoon No. 21 "Swallow" hit Japan. The strong winds with a maximum wind speed of more than 4 meters and strong rain caused great disasters in Western Japan. This caused various disasters to the social life in Kansai area. The following are some examples. During the two days when the typhoon was most severe, 659 domestic and foreign flights from two large airlines were grounded, affecting more than 64,000 passengers. Kansai Airport Because the contact bridge was crashed by an oil tanker, three thousand airport passengers were trapped at the airport overnight, and the runway of Kansai Airport was also blocked for five days due to flooding. Due to the large number of heavy rainstorms and storms carried by the typhoon, the entertainment facilities of Universal Studios were unable to operate, and Universal Studios was forced to close for two days.
Typhoons usually carry a lot of heavy rain and strong storms. If people are outside, there may be danger of being damaged by things blown by the wind, rivers are flooded, roads are flooded, buildings are trapped and unable to move, etc. Therefore, it is best to try not to go out. In addition, the tram will be delayed or stopped due to storms. Once you go out, you may be unable to return to your accommodation due to traffic difficulties. Therefore, if the typhoon is approaching, you should pay more attention to traffic information.
In summer, due to the high seawater temperature, it is also the most frequent season for typhoons. It will also be affected by the influence of Double Taiwan, Pacific High Pressure, Westerly Wind Zone , etc., making the route difficult to predict, such as slow travel speed or predicting that it will go north but suddenly head south, which is quite elusive. The typhoons in autumn will be affected by the westerly winds, and the speed of traveling faster than the summer typhoons. If they encounter the hot summer heat, the sea temperature will still be warm even in autumn, making the typhoon stronger. The added impact of the autumn rain front will make the typhoon more violent.
Japan has the most typhoons every year, especially in autumn, the typhoon speed is slow, the rain is strong, so you should pay more attention. In recent years, with the abnormal global climate of , seawater has gradually heated up, making the scale of typhoons increasingly tend to increase, and response measures in severe disasters have to be considered. So before visiting Japan, we must first confirm the meteorological information and anticipate disaster prevention measures, shelter actions, etc. to reduce the sorrow and troubles of people panic in other places.
