Why are there so many typhoons in summer? Why are there typhoons in the summer?

There are at least two conditions for the formation of a typhoon: 1. relatively high temperature 2. abundant moisture.

When boiling water, the water at the bottom of the pot rises because the water at the bottom of the pot expands due to heat. The same is true of air, when the air at the bottom is heated, it will rise. In the area with high temperature, a large amount of air will rise when there are some disturbances in the atmosphere, so that the air pressure on the ground will decrease, and then the peripheral air in the rising area will continue to flow into the rising area, and the incoming air will rotate like a wheel due to the rotation of the earth, which is one of the reasons for typhoons.

When the rising air expands and cools, the water vapor in it cools and condenses into water droplets, which releases heat, which in turn promotes the continuous rise of the low-level air, so that the air pressure on the ground drops more and the air rotates more violently, which forms a typhoon.

Where do you have both? Only on the surface of the tropical oceans. The temperature over the ocean surface there is very high, allowing the lower level air to fully accept water from the ocean surface.

It is also the most abundant place on the planet for water vessels, which are the main driving force for the formation and development of typhoons. Without this driving force, the typhoon will dissipate even if it forms. Secondly, there is a certain distance from the equator, and the deflection force generated by the earth's rotation has a certain effect, which is conducive to the development of typhoons, cyclone test circulation, and the strengthening of airflow convergence.

Clause. Third, it is the tropical ocean surface situation in the middle latitude is simple. Therefore, the air above the same sea area can often maintain constant conditions for a long time, so that the typhoon has sufficient time to accumulate energy and brew into the wind. In conjunction with these conditions, as long as there is a suitable trigger mechanism, such as:

Typhoons can form and intensify in some tropical ocean areas, such as divergent air currents at high altitudes or when the northern and southern hemisphere trade winds meet slightly north of the equator. According to statistics, in tropical oceans, typhoons often occur in areas where the ocean surface temperature exceeds 10 degrees.

According to statistics, the oceans that produce typhoons are mainly the seas east of the Philippines, the South China Sea, the West Indies and the east coast of Australia. These places are hotter and where the trade winds of the northern and southern hemispheres meet, so there are more than 20 typhoons a year.

Nan Fei Yan Rate: 2008-08-09 16:23 Report.

Typhoons are similar every year, and they are cyclones formed by subtropical ocean surface temperatures above 26 degrees Celsius, and the rising temperatures are also the cause of many typhoons.

Summer is here, the sun is getting more and more abundant, the air over the Pacific Ocean is constantly getting hotter and rising rapidly, and the colder air around it immediately flows over to replenish it.

2 As the earth rotates, the moving air begins to whirl, and the great vortex formed is a typhoon. Most of the typhoons that hit our country occurred in the Pacific Ocean east of the Philippines.

3 Once a typhoon has formed, it will start to advance in a violent vortex. There is often a strong high pressure to the north of the typhoon, so the typhoon bypasses the high pressure and pushes northward.

It is necessary to have a vast atmosphere of high temperature and high humidity. The temperature and humidity of the bottom atmosphere in the tropical ocean are mainly determined by the sea surface water temperature, and typhoons can only form on the warm ocean surface where the sea surface temperature is higher than 26 27, and the sea water temperature at a depth of 60 meters is higher than 26 27. A typhoon is a strong cyclone produced by a tropical depression, and only in summer is the tropical depression strong enough and the temperature conditions are sufficient.

1. Typhoon is a natural disaster that often brings violent storms and rains. It forms mainly in the tropics or subtropics, and has a temperature of 26 degrees Celsius, and is a tropical cyclone that occurs over a wide sea surface. So only in the summer, when the temperature can reach more than 26 degrees Celsius, can a typhoon occur.

2. Typhoons are also called hurricanes and cyclones, in fact, they are both tropical cyclones, but because of the different locations where they occur, they are called differently. For example, in the western North Pacific and the Philippines, these places in China are called typhoons, while in the United States they are called hurricanes, and in the southern hemisphere, they are called cyclones. So it's just a different name for where it happened and when it happened.

3. Although typhoons will endanger human safety, they also play a certain protective role. For example, typhoons can bring fresh water resources, which greatly alleviates global water shortages. Just one modest typhoon can bring nearly 3 billion tonnes of precipitation to land.

To sum it up in one sentence, there can't be too many typhoons and can't have none.

1. Typhoon is a natural disaster that often brings violent storms and rain. It is mainly formed in the tropics or subtropics, and the temperature must reach more than 26 degrees Celsius, which is a tropical qi deficiency that occurs on the vast sea surface. Therefore, it is only in the summer that the temperature can reach 26 degrees Celsius and swim above quietly to produce typhoons.

2. Typhoons and hurricanes are called cyclones, in fact, they are both tropical cyclones, but because they occur in different locations, they are called differently. In the western part of the North Pacific and the Philippines, these parts of China are called typhoons, while in the United States they are called hurricanes, and in the Southern Hemisphere, they are called cyclones. So it's just a different name for where it happened and when it happened.

Typhoon is a type of tropical cyclone, and if you look at the causes of typhoons below, you will know why it is in summer.

Typhoon formation. The direct exposure of the tropical sea surface to the sun raises the temperature of the sea, and the evaporation of the sea provides sufficient water vapor. The condensation of water vapour during the uplift releases a large amount of latent heat, which promotes the further development of convective motion, causing the pressure at sea level to drop, causing the surrounding warm and moist air to flow in and replenish, and then uplift. This cycle results in a positive feedback, the second type of conditional instability (CISK) mechanism.

On the vast surface of the sea with the right conditions, the area of influence of the circulation will continue to expand, reaching hundreds to thousands of kilometers.

Because the earth rotates at a high speed from west to east, the air column and the earth's surface cause friction, because the closer to the equator, the stronger the friction, which guides the air column to rotate counterclockwise (the southern hemisphere system rotates clockwise), because the speed of the earth's rotation is fast and the air column cannot keep up with the speed of the earth's rotation and forms a sensory westward movement, which forms what we now call typhoons and typhoon paths.

The following is a description of the first volume of the geography book of the first year of high school in the people's education edition::

In tropical or subtropical oceans with an ocean surface temperature of more than 26, due to the high near-ocean surface temperature, a large amount of air expands and rises, which reduces the near-ocean surface pressure, and the peripheral air continuously replenishes and rises inflow. Under the influence of the geostrophic deflection force, the incoming air rotates. When the rising air expands and cools, the water vapor in it cools and condenses to form water droplets, which releases heat and causes the low-level air to rise.

As a result, the near-ocean pressure drops lower, the air rotates more violently, and a typhoon is formed.

Typhoon structure. From the typhoon structure, it can be seen that such a huge behemoth must have unique conditions for its generation.

First, there must be a vast atmosphere of high temperature and high humidity. The temperature and humidity of the bottom atmosphere in the tropical ocean are mainly determined by the sea surface water temperature, and typhoons can only form on the warm ocean surface where the sea surface temperature is higher than 26 27, and the sea water temperature at a depth of 60 meters is higher than 26 27.

Second, there should be an initial disturbance in which the lower atmosphere converges towards the center and the upper atmosphere spreads outward. Moreover, the high-level divergence must exceed the low-level convergence in order to maintain sufficient updraft, and the low-level disturbance can continue to intensify.

3. The vertical wind speed should not be too different, and the relative movement of the upper and lower layers of air should be very small, so that the latent heat energy released by water vapor condensation in the initial disturbance can be concentrated in the air column in the eye area of the typhoon, so as to form and strengthen the warm center structure of the typhoon.

Fourth, it is necessary to have a sufficiently large geostrophic deflection force to act as a typhoon structure.

It is beneficial for the formation of cyclonic vortices. The geostrophic deflection force is close to zero near the equator and increases to the north and south poles, and typhoons basically occur over the ocean about 5 degrees above the equator.

The area where the typhoon occurs is in the tropical ocean, which is about 5° to 20° north latitude.

In summer, the climate is hot and humid on the surface of the sea, and the air is constantly rising to the sky, creating a low pressure zone on the sea surface, and the surrounding air is constantly replenished. After being heated, the temperature of the rising hot air decreases at high altitude, condenses into water droplets and releases heat, which causes the sea surface air to accelerate the rise of the object-free bonds, and the air on the surrounding sea surface accelerates to replenish. As a result of the Earth's rotation, the flowing air dome happens to rotate and become the climate, which is how typhoons are created.

Hello landlord.

In the Northwest Pacific, typhoons occur throughout the year, but most of them are concentrated in summer and autumn. Typhoons occur in summer and autumn, and 8% in winter and springIt takes a huge amount of energy to generate a typhoon, and it is easy to understand that the high temperature, humidity, and abundant energy over the ocean in summer are conducive to the occurrence of typhoons, while in winter it is the opposite, so there are more typhoons in summer and less in winter.

However, spring and autumn are both cold and warm transition seasons, so why is there such a huge disparity in the proportion of typhoons?

We know that there are three basic conditions for the formation of a typhoon: 1. Energy (sea temperature is 26-2

7 or more); 2. Suitable environment (intertropical convergence zone); 3. The deflection force of the Earth's rotation. Among them, the deflection force of the Earth's rotation is the same in each season, and the other two conditions are significantly different. The sea temperature changes with the change of seasons.

From winter to summer, the sea surface receives more radiant heat from the sun than it emits from the seawater, causing the sea temperature to gradually increase. From summer to winter, on the contrary, the sea temperature gradually decreases.

However, the time when the sea heat budget reaches equilibrium is not on the summer solstice or winter solstice, when the sun directly hits the earth, so the highest sea temperature is not in June but in August, and the lowest temperature is not in December but in February.

As far as Guangdong is concerned, there is an average number of typhoons that make landfall every year, and so far this year, only "Coral" has visited Shantou, and the wind and rain are small, so it is indeed on the low side. Meteorological experts pointed out that the fact that there were fewer typhoons that landed in Guangdong this summer had a lot to do with the location of the subtropical high, which led to more typhoons moving north. However, this year's typhoon season is not over yet, and the latest typhoon made landfall in Taishan, Guangdong Province in early December 1974, so the possibility of an autumn typhoon landing cannot be ignored at present.

The direction of the typhoon in autumn will also be affected by the southward movement of cold air. (

The summer was too hot, and the general wind couldn't make people feel cool, so the typhoon had to blow.

There are many typhoons in summer and autumn.

Causes of typhoons.

Typhoons originate in tropical seas, where temperatures are high and large amounts of seawater are evaporated into the air, creating a center of low pressure. As the air pressure changes and the earth itself moves, the incoming air also rotates, forming a whirlpool of air that rotates counterclockwise, which is called a tropical cyclone. As long as the temperature does not drop, this tropical cyclone will become more and more powerful, and eventually a typhoon will form.