The new situation of the recent typhoon is the cause of the formation of the typhoon

How much impact will Typhoon Meihua have on Anshan, Liaoning Province This year's No. 9 severe tropical storm "Meihua" is expected to continue to move northeast at a speed of about 30 kilometers per hour, gradually weakening in intensity.

Regarding the "causes of the formation of typhoons" are as follows:1. The geostrophic deflection force should be largeThe necessary condition for the formation of a typhoon is a sufficiently large deflection force of the Earth's rotation. The Earth's rotational deflection force is the driving force for the formation of a typhoon**, and only if the Earth's rotational deflection force is large enough for a typhoon to spin.

At the equator, the geostrophic deflection force is zero, and the disturbance cannot develop into rotation, so there is no typhoon formation. Therefore, geostrophic deflection force is one of the important factors in the formation of typhoons.

2. Water vapor conditionsOne of the three conditions for the formation of a typhoon is the water vapor condition. In summer and autumn, the sea surface temperature is high, and the water vapor continues to transpire, forming a low pressure. In such a flowing airflow environment, the sea level temperature is high, and the water vapor has been transpiring upward, and it is not possible without water vapor, and the energy ** is abundant water vapor.

Therefore, abundant water vapor is one of the necessary conditions for the formation of typhoons.

3. High temperatureThe fundamental cause of the formation of typhoons is the high sea surface temperature in the tropics, the high evaporation of seawater, the formation of low pressure centers, and the formation of air whirlpools. Water on the surface of the water can only evaporate if the temperature is high, so the formation of typhoons is also closely related to temperature. When the temperature is high, the evaporation of the water surface is large, and the formation of typhoons also needs to consider the influence of temperature.

Categories: Science & Engineering.

Problem description: How is a typhoon formed and what are its effects? (Please briefly, it is best to summarize it in 2 or 3 sentences) Analysis: A typhoon is a very violent storm that occurs in the tropical ocean of the western North Pacific.

In some areas of the ocean, because the sea water is very hot by the sun, the air on the sea surface rises straight into the sky, and then the cooler air around it takes advantage of the situation to make up for the shortage, and the air rises straight up to the sky, and then the colder air around it takes advantage of the situation to make up for the shortage, and flows towards the center together, and the air rotates violently in the counterclockwise direction due to the rotation of the earth. As it rotates, it moves in a westerly or northwesterly direction, turning faster and bigger. The center of the typhoon is the very center of this area of rotating air, and its pressure is extremely low and the wind is very weak.

Its central area is approximately 10 kilometers in diameter within a circular area. But outside the central area, it is windy. The "edge of a typhoon" refers to the area where the wind force on the outer edge of the typhoon reaches Category 6.

The disasters caused by typhoons are most pronounced by strong winds and torrential rains, which sometimes cause ** and seawater inundation. Winds near the center of the typhoon often reach level 10 or higher, and there are torrential rains, which can cause huge waves like mountains in the ocean.

The following four points are the reasons for the formation of typhoons:

1.First of all, there must be a sufficiently wide tropical ocean surface that requires not only the surface temperature of the sea to be higher, but also more than this value in a layer of water at a depth of 60 meters. The vast ocean surface is a necessary natural environment for the formation of typhoons, because the friction between the air molecules inside the typhoon consumes an average of 3,100-4,000 calorie cm*2 of energy per day, and this huge energy is only possible by the latent heat released by the vast tropical ocean**.

2.Before a typhoon can form, a weak tropical vortex must be present beforehand. A typhoon is also a "heat engine", it turns there with such a huge scale and speed, it consumes a lot of energy, so there must be energy**.

The energy of a typhoon comes from water vapor from tropical oceans. The upward movement of air is an important factor in the formation and maintenance of typhoons. However, it is necessary for the existence of a weak tropical vortex.

3.There should be a sufficiently large geo-rotational deflection force, because the geostrophic deflection force at the equator is zero, and the poles gradually increase, so the typhoon occurs about 5 degrees away from the equator. Due to the rotation of the earth, a force is created that changes the direction of the flow of air, which is called the "deflection force of the earth's rotation".

On a rotating Earth, the Earth's rotation makes it difficult for the surrounding air to flow directly into the depression, but instead rotates counterclockwise along the center of the depression (in the Northern Hemisphere).

4.Above the weak low pressure, the difference in wind direction and wind speed between the high and low altitudes is small. In this case, the upper and lower air columns act in unison, and heat in the upper air tends to accumulate and thus warm.

Once a cyclone is formed, the ambient air flow above the friction layer will flow along the isobar, and the warming effect of the upper layer will be further completed.

The process of typhoon formation is as follows:

On the tropical ocean, seawater is very easy to evaporate into water vapor after being directly exposed to the sun, therefore, relative to the land, the temperature and air humidity above the ocean are much larger, according to the ocean network, this air expands due to high temperature, resulting in a decrease in density and a reduction in mass, and the wind near the equator is weak, so it is easy to rise, convection occurs, and at the same time, the surrounding colder air flows in to supplement, and then rises, and so on, so that the entire air column is higher temperature, lighter weight, less dense air, which forms the so-called " Tropical depression". In addition, the air flows from the high pressure to the low pressure, and the air at the higher pressure around the air flows to the lower pressure, thus forming wind.

The Earth's rotation and revolution form distinct seasons and day and night, and the formation of typhoons is also related to it. As the Earth rotates, the direct point of the sun moves across the equator to the northern hemisphere in the summer, and the southeast trade winds in the southern hemisphere oceans also jump over the equator and become the southwest monsoon in the northern hemisphere. When the southwest monsoon meets the northeast trade winds, which are already active in the Northern Hemisphere, they increase air convection, causing fluctuations and swirls.

When the convection in the air becomes stronger and stronger, the vortex deepens, the surrounding air flow speed increases, and the wind becomes stronger and stronger, and when the wind speed reaches or exceeds meters per second, a typhoon is formed.

The conditions for the formation of typhoons include the following four points

1. The natural conditions should be sufficiently broad in the tropical ocean. The surface temperature of the sea is above Celsius, and the depth of the sea surface is at least 60 meters.

2. There should be a tropical vortex.

3. There should be a sufficiently large deflection force for the rotation of the earth.

4. Before the formation of typhoons, the difference between wind direction and wind speed in high and low space should be small.

The above content reference: People's Daily Online - How did the daunting typhoon form?

The cause of the typhoon is that the ground temperature is high, the air flow rises, the sea surface wind and water vapor due to the large proportion, the ground air is supplemented along the ground, the sea surface temperature is low to absorb the air and water vapor rising from the ground, and the space is replenished by the water vapor.

The cause of the typhoon is that the ground temperature is high, the air flow rises, the sea surface wind and water vapor due to the large proportion, the ground air is supplemented along the ground, the sea surface temperature is low to absorb the air and water vapor rising from the ground, and the space is replenished by the water vapor.