What is Typhoon? How are typhoons formed? What is its path?

The others upstairs answered. Only the movement path was not answered. The normal movement is along the periphery of the subtropical high; Move northwest. Of course, there are also abnormal east-fold and west-fold paths, serpentine paths, etc., and no one can judge the specific paths, so we need to continue to study.

The typhoon's shifting path is from southeast to northwest.

On the graticule map, the graticule is used to determine the direction, the latitude line indicates the east-west direction, and the meridian line indicates the north-south direction. A network of intertwined warp and weft threads is called a graticule, which can be used to determine the location of any point on the earth's surface.

On the graticule, the degree of the meridian is called longitude, if the longitude of the two adjacent meridians increases to the east, it is the east longitude, which is represented by the symbol e, and if the longitude of the two adjacent meridians increases to the west, it is the west longitude, which is represented by the symbol w; The degree of latitude is called latitude, if the latitude of the adjacent two parallels increases to the north, it is the north latitude, which is represented by the symbol n, and if the latitude of the adjacent two parallels increases to the south, it is the south latitude, which is represented by the symbol s.

Typhoon structure

A typhoon is a deep system of depression with a very low central pressure, with significant convergence towards the center in the lower layers and major outward divergence in the top. If you cut the typhoon horizontally, you can see that there are three distinct areas, from the center to the outward: the typhoon eye area, the cloud wall area, and the spiral rain belt area.

Typhoon Eye Zone: Very peculiar, where the wind is very small, the weather is clear, and the average diameter is 40 kilometers, and the seafarers who are present in it humorously call the typhoon eye a "paradise" for typhoons.

Cloud wall area: The cloud wall area around the eye of the typhoon is dozens of kilometers wide and more than ten kilometers high, also known as the eyewall. Here the cloud walls are towering, the wind is howling, the rain is pouring down, the sea is churning, and the weather is at its worst.

The path of a typhoon is mainly affected by the atmospheric environment.

The dynamics that determine the movement of a typhoon can be divided into two types: internal and external. The internal forces of a typhoon are mainly caused by the geostrophic deflection forces associated with the rotation, air flow convergence and upward motion of the typhoon itself. The magnitude of the typhoon's internal force is directly proportional to the radius of the typhoon, the convergence and upward motion of the air in the vortex, and the magnitude of the tangential wind, and inversely proportional to the latitude where the typhoon center is located.

Under the action of simple internal forces, the trajectory of the typhoon center is a complex cycloid composed of superposition of sine waves and cosine waves with different amplitudes and the same period. The external forces of a typhoon mainly include the pressure gradient force of the environment (mean airflow), the geostrophic deflection force, and the friction force.

There are three types of typhoon paths: westward path, landfall path and parabolic path.

1. Westward Path:

After the typhoon formed from the ocean east of the Philippines, the basic airflow around it was weak, and the movement of the typhoon center was mainly an internal force movement in the direction of the northwest. Under the influence of the subtropical high at high altitude, a deep easterly airstream will guide the typhoon to move westward.

Until the landfall in the eastern and western coasts of Guangpei, Hainan Island or Vietnam, typhoons moving along this path have the greatest impact on the coastal areas of Hainan, Guangdong and Guangxi in China, and often occur in spring and autumn. The westward trend of the typhoon moved westward from the east of the Philippines through the South China Sea before making landfall on China's Hainan Island or northern Vietnam, mostly in October and November.

2. Landing path:

After the typhoon is formed in the eastern waters of the Philippines, it will encounter a southerly wind with an axis from northwest to southeast, and under the guidance of this deep air current, the typhoon will move from the ocean east of the Philippines to the northwest, land in Taiwan through the Bass Strait, and then cross the Taiwan Strait to approach the eastern part of Guangdong or the coast of Fujian.

The typhoon moved northwestwards and made landfall along the coasts of Guangdong, Fujian and Zhejiang, China, and gradually weakened into a depression. This type of typhoon has the greatest impact on China. Typhoon 9015 and Typhoon 9711, which have had the greatest impact on Jiangsu in recent years, are of this type, and they basically follow this path from July to August.

3. Parabolic path:

Typhoons move northwest first, and when approaching the eastern coastal areas of China, they turn to the northeast without making landfall and turn towards the vicinity of Japan, with a parabolic path, which mostly occurs after the formation of typhoons from May to June and September to November, and generally moves out of the source area and goes through the evolutionary process of development, weakening and extinction.

A mature typhoon has a circular vortex radius of 500km to 1000km and a height of 15km to 20km. The wind speed in the outer area increased from the outside to the inside, and there were spiral cloud bands and showers of dry water.

The most intense precipitation occurs in the area of maximum wind speed, with an average width of 8 km to 19 km, and it has a ring wall between it and the eye of the typhoonThe eye of the typhoon is located in the center of the typhoon, and the most common eye is circular or elliptical in shape, with a diameter ranging from about 10 km to 70 km, with an average of about 45 km.

Summary. The typical path of a typhoon includes a westbound path, a northwest path, and a steering path.

The typical path of a typhoon includes a westbound path, a northwest path, and a steering path.

When the atmospheric circulation in the northwest Pacific is complex or abruptly abrupt, tropical cyclones will have some abnormal paths, such as the sudden northward movement of typhoons in the South China Sea, the serpentine swing path, and the mutual rotation of two typhoons, which are very bizarre and bizarre. Westbound Path:

Tropical cyclones move westwards from their source areas (referring to the ocean east of the Philippines) and tend to make landfall in Guangdong and Hainan. Northwest Track: Tropical cyclones move northwestwards from their source areas, mostly making landfall along the coasts of Taiwan, Fujian, and Zhejiang.

Steering path: The tropical cyclone moves northwest from its source and turns to the northeast when it is close to the eastern coast of China.

Summary. The first is the westward path. Tropical cyclones move westwards from their source areas (referring to the ocean east of the Philippines) and tend to make landfall in Guangdong and Hainan Island. The second is the northwest path.

Tropical cyclones moved northwestwards from their source areas, mostly making landfall along the coasts of Taiwan, Fujian and Zhejiang. The third is the steering path. Tropical cyclones move northwestwards from their source and turn northeastwards when they reach the eastern coast or sea surface of our country.

The first is the westward path. Tropical cyclones move westwards from their source areas (referring to the ocean east of the Philippines) and tend to make landfall in Guangdong and Hainan Island. The second is the northwest path. The tropical cyclone moved northwestwards from its source, and it made landfall along the coasts of Taiwan, Fujian and Zhejiang. The third is the steering path.

Tropical cyclones move northwestwards from their source and turn to the northeast when they reach the eastern coast or sea surface of China.

At present, in meteorological forecasting, the methods used are as follows:1Extrapolation.

It is assumed that the direction and velocity of Cyclone Wangxingkai in the near future will be the same as those in the previous period. 2.Similarity method. In the historical data, we find out the similarities with the tropical cyclone at that time in terms of the occurrence time, location, and previous movement path of the tropical cyclone, and use it as an example model as the basis for forecasting.

3.There are also theoretical analysis methods and calculation methods, meteorology is called weather map method, numerical forecasting method, statistical method, etc.

Summary. Dear Hello <>

The path of a typhoon is determined by a number of factors, including climatic environment, atmospheric circulation, ocean temperature, etc. Generally speaking, the path of a typhoon shows a certain regularity, but there is also a certain degree of uncertainty.

What is the path of the typhoon?

Dear to you, you have a good <>

The path of a typhoon is determined by a number of factors, including the climatic environment of the Eggplant Belt, atmospheric circulation, and ocean temperature. Generally speaking, the path of a typhoon shows a certain regularity, but there is also a certain degree of uncertainty.

The path of a pro-typhoon is usually influenced by atmospheric circulation systems such as the westerly wind belt, the subtropical high, and the subtropical westerly jet. In the Pacific, typhoons usually form from the southeast and move in a northwesterly or northerly direction. In the Atlantic, typhoons often form from the southeast and move northwest or north.

In addition, the dispersion of ocean temperature is also an important factor affecting the path of typhoons. The warm surface waters of tropical oceans can provide sufficient energy for typhoons to develop and move. When a typhoon encounters a cold current or land, it tends to weaken or change its direction.

It should be noted that the path of the typhoon's land core is not completely possible, because the climatic environment and the early development of the atmospheric circulation system will affect the path of the typhoon. The meteorological department will carry out the ** based on satellite observations, land guess meteorological data and numerical models, etc., but there are still certain difficulties in accurate**.