How powerful is the ocean typhoon?

People sometimes find a strong cyclone that looks like a mushroom on the surface of the tropical ocean. Its diameter is usually more than several hundred kilometers, and the height of the cloud is more than 9 kilometers. This is a typhoon. The surge, rainstorm and storm surge brought by it have caused great damage to ships and coastal facilities at sea.

Typhoons can be divided into typhoon eye area, typhoon vortex area and typhoon peripheral area. The typhoon eye area is the central part of the typhoon, and it is a relatively quiet hollow tubular area with cloudy or cloudless weather, with a diameter of 10 ~ 60km, extremely low air pressure and little change, surrounded by high cloud walls. The sea conditions here are very bad, and there are often pyramid waves that are extremely harmful to ships. Typhoon vortex area is an annular area with the highest wind speed around the eye of typhoon, where the tall and wide cloud wall is tens of kilometers wide and the radius is about 100 kilometers. Strong winds of 40 m/s to 60 m/s are common in this area, and there have been strong winds above 100 m/s, and the periphery of the typhoon is a windy area on the edge of the typhoon. The weather in this area is chaotic and ups and downs, with heavy and small rainfall, falling and stopping. The wind gradually increased to the center of the typhoon, and the air pressure decreased.

1On September 26th, 935, the 4th Fleet of the Japanese Navy was suddenly attacked by a typhoon when it was marching off the coast of Sanlu. However, despite the heavy wind and waves, it went on as planned. At that time, the maximum wind speed in the typhoon center was 40m/s, and the maximum wave height was above 14m. The fleet crossed the typhoon and entered the typhoon eye. As a result, 38 warships were attacked by strong winds and waves, the destroyers "Chuxue" and "Xiyu" were intercepted by the waist, the bridge of "Wang Yue" was broken, all the mine ships that entered the dangerous semicircle were wiped out, and more than 5,000 tons of 14 large ships were also damaged to varying degrees, resulting in a large number of casualties and extremely heavy losses.

Central Japan and kanto region were hit by a typhoon on September 26th. 1958. The torrential rain brought by the typhoon caused the embankment of Izu Kanye River to burst, and the northern plain of Izu became a piece of Wang Yang, and 5000 people died immediately. The coastlines of Nagoya and Shikoku were flooded, and 5000 people were swept away by the flood again. This typhoon from Izu Bay not only made people know the terrible typhoon, but also tasted the tsunami.

1there was also a typhoon on September 26, 954, which transited from Japan and then turned back to attack Hokkaido. The huge wind and waves turned the 8,000-ton Qingdao-Guangzhou combined transport ship "Dongye Maru" upside down, and 1300 people were buried at the bottom of the sea. "Dongye Maru" is not an ordinary ship, but a high-quality ship that makes the crew proud, and the loading and unloading facilities on board are also very advanced. At that time, there were not only the "Dongye Maru" on the sea of Hakodate, but also many cargo ships in Han Qing overturned and sank in an instant.

1970 165438 10 The typhoon that occurred in Bangladesh in October was the most serious typhoon disaster in modern times. This typhoon, which develops strongly in the Bay of Bengal, has a central pressure as low as 940 hectopascals and a maximum wind speed of 120 knots (62 m/s). It landed in Khathia near Chittagong on the night of1October113, and violently attacked the Bangladeshi coast. Strong winds, heavy rains and big tides have swallowed up countless islands, fishing villages and farms. Because those two days happened to be the 14th and 15th of the 10th lunar month, they caught up with the astronomical tide. Coupled with the storm surge, the highest tide level exceeded 6m, and the huge waves swept away many people who were still sleeping. In a short time, more than 300,000 people were killed and tens of millions were displaced. The entire densely populated Ganges Delta instantly turned into a terrible hell on earth. The huge economic losses it has suffered are incalculable.