When is the typhoon season in Japan? Which month has the most typhoons in Japan?

Tourism is most worried about natural disasters, such as earthquakes and typhoons. As we all know, Japan is a country with frequent typhoons. Everyone must pay more attention to typhoons before going out, and pay more attention when planning to travel.

Japanese typhoon

The typhoon season in Japan is generally in summer and autumn from June to 65438+10, and September in autumn is the high incidence season.

Because of the relatively high latitude in Japan, in winter and spring, typhoons have been transformed into extratropical cyclones and merged into the westerlies before reaching Japan, so typhoons that landed relatively intensively and affected Japan generally appeared in June-10, and the subtropical high moved northward in June, so typhoons had room for activities. It was early summer, and there were many examples of typhoons affecting Japan in the past. September-10 is in autumn, the subtropical high is weakened, and the typhoon tends to go northward after its formation, which will also have an impact on Japan.

September is the typhoon season in Japan. At this time, typhoons often hit the coastal areas of Okinawa, Kyushu and Shikoku, bringing strong winds and rainy weather to Japan as a whole. The most destructive and severe storm in Japanese history also occurred in September.

For example, Typhoon Dayou on September 2 1, 1945, Typhoon Tochizaki on September 2 17, 16, Typhoon Ise Bay on September 26, 1959 (Typhoon 59 15 Among them, Typhoon Muroto, Typhoon Tochizaki and Typhoon Ise Bay are even called "Showa Three Typhoons", which have caused extremely serious disasters.

Why do typhoons like to go to Japan?

Typhoon source refers to the sea areas where typhoons often occur, and global typhoons mainly occur in 8 sea areas. In the northern hemisphere, there are five sea areas: the western and eastern North Pacific, the western North Atlantic, the Bay of Bengal and the Arabian Sea, while in the southern hemisphere, there are three sea areas: the western South Pacific, the western and eastern South Indian Ocean. From the regional distribution map of the number of typhoons and their percentage in the total number of typhoons in the world, it can be seen that there are 62 typhoons on average every year in the world, and there are many more typhoons in the western ocean than in the eastern ocean. Among them, the northwest Pacific is the most (accounting for more than 36%), while typhoons have not been found in the South Atlantic and Southeast Pacific. Typhoon sources in the northwest Pacific are divided into three relatively concentrated areas: the ocean east of the Philippines, the ocean near Guam and the central South China Sea. The typhoon formed in the South China Sea has a great influence on the south of China.

Most typhoons occur at 5 ~ 20 latitudes, especially at 10 ~ 20, accounting for 65% of the total. However, only 65,438+03% typhoons occur at higher latitudes outside 20, and there are few typhoons within 5 near the equator, but there are occasional typhoons. For example, Fujian Meteorological Observatory found that there were three typhoons in the northwest Pacific Ocean south of 5° n in recent two years. According to the analysis of satellite data in recent ten years, the disturbed clouds that developed into typhoons can be found a few days ago, so the initial position of the disturbance is actually eastward than the previously found position. For example, in the North Atlantic, it used to be thought that most of the initial disturbances that developed into typhoons originated in the middle of the ocean, while some people thought that two-thirds of typhoon disturbances originated from the African continent every year according to cloud image analysis. These disturbances usually appear in the form of inverted V-shaped or vortex clouds. They moved westward along the easterly airflow and developed into typhoons when they reached the central North Atlantic and the Caribbean. The initial disturbance position of typhoons in the northwest Pacific and South China Sea is also eastward than that previously found. The harm of typhoon

The destructive power of typhoons is mainly caused by strong winds, heavy rains and storm surges.

1. Strong typhoon is a huge energy pool, and its wind speed is above 17m/s, even above 60m/s ... According to the measurement, when the wind reaches 12, the wind pressure per square meter on the plane perpendicular to the wind direction can reach 230kg.

2. Rainstorm typhoon is a strong precipitation system. When the typhoon lands, the rainstorm center can drop 100-300mm a day, or even reach 500-800mm. The floods caused by typhoons and rainstorms are the most dangerous disasters. Typhoon rainstorm is strong, flood occurs frequently, spreads widely, and is fierce and destructive.

3. Storm Surge The so-called storm surge means that when the typhoon moves to the land, due to the typhoon's strong wind and low air pressure, the sea water accumulates strongly in the direction of the coast, the tide level rises sharply, and water waves are overwhelming to the coast. The storm surge of a strong typhoon can raise the coastal water level by 5-6 meters. Storm surge meets astronomical high tide level, resulting in high-frequency tide level, which leads to tidal overflow, seawall burst, washed away houses and various building facilities, flooded towns and farmland, and caused a large number of casualties and property losses. Storm surge will also cause coastal erosion and land salinization caused by seawater intrusion.