Why did most of the typhoons of 20 16 reach Japan?

The moving path of tropical cyclone is mainly influenced by the airflow around subtropical high (subtropical high), so the position and range of subtropical high basically determine the path of tropical cyclone, and its moving path can be roughly divided into:

Westward type

After the tropical cyclone formed in the waters east and west of the Philippines (namely the South China Sea), it moved westward and gradually moved slightly northward. Tropical cyclones generated at different latitudes pass through different areas. When the latitude is low, it will cross the Philippines into the South China Sea and finally land in China, Guangdong, Hainan or Viet Nam. At higher latitudes, it can pass through bashi channel, affect Taiwan Province Province, and then land in Guangdong and Fujian. In winter and spring, the subtropical high is southerly, so the typhoon latitude is low in165438+10-May, and its track will be southerly. Generally, it only enters the South China Sea south of 16 degrees north latitude, and finally lands in Vietnam, occasionally affecting Thailand and even entering the Bay of Bengal, such as Typhoon Lily 1325.

Northwest type

The path is close to the west type, but the northward component increases. The northwest typhoon can pass through Taiwan Province Province or bashi channel, and then land along the coast of China, Guangdong and Fujian. It is also possible to cross the Ryukyu Islands and land on the coast of China, Zhejiang and Jiangsu. Most typhoons along this route appear in July and August in midsummer every year, such as Typhoon Fett (1323).

Steering type

After the tropical cyclone formed in the east of the Philippines or near Guam, it first moved to the west-northwest direction, turned to the northwest near the north latitude 15 to 30 degrees, and finally turned to the north and northeast directions, forming a parabola. 165438+ 10 to May of the following year, most of the tropical cyclones turned north in the Pacific Ocean east of 130 degrees east longitude, and rarely landed in East Asia, mainly affecting the islands in the Pacific Ocean. Most tropical cyclones that turned in June and 10~ 1 1 also turned at sea. From July to August, tropical cyclones turn to the west by north, which may affect Taiwan Province Province, the East China Sea or Zhejiang and Jiangsu along the eastern coast of China, and then affect the Korean Peninsula and Japan, such as the super typhoon "Fansco" of 1327.

Vagal nerve type

Some tropical cyclones, such as Tebin/KOOC-0/2/KOOC-0/4, Typhoon Rosa/KOOC-0/329, Strong Typhoon Lion Mountain/KOOC-0/6/KOOC-0/0, etc., vortex or stagnate due to the unknown turning airflow or the influence of other weather systems.