About 300 words is enough for a scientific paper about typhoon.

Typhoon investigation report

Zhejiang Xiaoshan Tiyu Road Primary School Shen No.503

Typhoon, the word must be familiar to everyone. In the weather forecast, news media and Internet, there have been reports of two typhoons, Haitang and Mai Sha, in recent weeks. Today, "Mai Sha" came, and I experienced it personally.

As soon as I went out, the typhoon startled me ―― a billboard fell from the sky not far away, scraped downstairs several times and fell to the ground with a bang. I thought to myself: fortunately, no one was there at that time, otherwise it would be no small matter to hit a pedestrian. Inadvertently looked up, I really don't know, I was shocked. I found a flowerpot writhing, as if to say, "If you come here again, I'll fall and hit you!" " "Scared me to flee the" danger zone ".

In the street, I feel everywhere is full of danger. If you want to go left, you are always afraid that the billboard will fall; I want to go to the right, but I'm afraid of being hit by a shaking street lamp. The trees on the roadside are also twisted with pain and make a "whoop" sound, but it's just a scratch! It seems that the typhoon is really powerful!

How weak human beings are in the face of typhoon, like a giant palm ravaging the earth, which makes me flinch. What is a typhoon? Where does this great power come from? How to disappear? We won't be helpless in front of her! My heart is full of countless questions and curiosity, and the mystery of nature has firmly attracted me, and I am excited about it.

There are all the contents of small topic research! In the roar of nature, I stumbled back home, and solving the mystery of nature became my top priority.

First, the origin of typhoon

Typhoon is a strong tropical cyclone. Like the vortex in water, it is an air vortex that rotates rapidly around its center on the surface of tropical ocean and moves forward at the same time. Just like a gyro in motion, people sometimes compare it to an "air gyro". Because typhoons are often accompanied by violent storms, they are given a name different from ordinary strong winds in meteorology-typhoon.

Second, the naming of typhoons.

Typhoons have many names, such as "Mai Sha" and "Yunna". More than once, I heard my mother ask, "Why do typhoons take these names?" But there has been no answer. Do you also want to know the origin of these names? Please read below!

Since June 65438+1 October1day, 2000, a new nomenclature table has been put into use in the northwest Pacific, which is completely different from the previous one. They all adopt the Asian names provided by 14 countries and regions, members of the Typhoon Committee of the World Meteorological Organization. Its characteristics are: first, most of them use the names of flowers, animals, birds, trees and even food, and some are descriptive adjectives; Two, the name list does not use the alphabetical order of the names, but according to the alphabetical order of the countries or regions that provide the names. Each country and region provides ten names, and there are 140 names in the name list.

In general, the pre-established naming list is reused year after year in sequence, but under special circumstances, some names may "retire" from the famous list. Why is this happening? It turns out that when a typhoon causes particularly serious disasters or casualties, it becomes a well-known typhoon. In order to prevent it from having the same name as other typhoons, the name has been deleted from the current list and will not be used in the future.

Third, the formation of typhoons.

The formation of typhoon is a complicated process, which must have unique natural and meteorological conditions and its structure is extremely complicated.

The conditions for the formation of typhoons are as follows: First, there must be a vast atmosphere with high temperature and high humidity. The temperature and humidity of the bottom atmosphere on the tropical ocean surface are mainly determined by the sea surface temperature, and typhoons can only form on the warm ocean surface where the sea surface temperature is higher than 26℃-27℃ and the sea surface temperature is higher than 26℃-27℃ within 60 meters. Second, there should be an initial disturbance that the lower atmosphere converges to the center and the upper atmosphere spreads outward. Moreover, the divergence of the upper layer must exceed the convergence of the lower layer in order to maintain enough updraft and continuously strengthen the disturbance of the lower layer; Third, the vertical wind speed cannot be too different, and the relative motion between the upper and lower air is very small, so that the latent heat released by water vapor condensation in the initial disturbance can be stored in the air column in the typhoon eye area, forming and strengthening the typhoon warm center structure; Fourth, there must be enough geostrophic deflection, and the earth's rotation is conducive to the formation of cyclonic vortices. The geostrophic deflection force is close to zero near the equator and increases at the north and south poles. The typhoon occurred on the ocean surface about 5 latitudes from the equator.

Fourth, the hazards of typhoons.

Today, as long as you turn on the TV, radio and computer to surf the Internet, you will see or hear about the hazards of typhoons, such as casualties, tens of thousands of houses collapsed, countless fertile fields flooded, small streets and alleys turned into rivers ... strong winds, heavy rains and mudslides, and countless people are waiting helplessly for the arrangement of nature in the swaying "comfort zone". The sudden and huge destructive power of typhoon has become one of the most serious natural disasters in the world.

The destructive power of typhoons is mainly caused by strong winds, heavy rains and storm surges.

1, strong wind

Typhoon is a huge energy pool, and its wind speed is above 17m/s, even above 60m/s. According to the measurement, when the wind reaches 12, the wind pressure per square meter on the plane perpendicular to the wind direction can reach 230kg.

2. Heavy rain

Typhoon is a very strong rainfall system. When the typhoon lands, the rainstorm center can drop 100-300mm a day, or even reach 500-800mm. The floods caused by typhoons and rainstorms are the most dangerous disasters. Typhoon rainstorm is strong, flood occurs frequently, spreads widely, and is fierce and destructive.

3. Storm surge

The so-called storm surge means that when the typhoon moves to the land, due to the typhoon's strong wind force and low air pressure, the sea water accumulates strongly in the direction of the coast, the tide level rises sharply, and water waves come to the coast. The storm surge of a strong typhoon can raise the coastal water level by 5-6 meters. Storm surge meets astronomical high tide level, resulting in high-frequency tide level, which leads to tidal overflow, seawall burst, washed away houses and various building facilities, flooded towns and farmland, and caused a large number of casualties and property losses. Storm surge will also cause coastal erosion and land salinization caused by seawater intrusion.

V. Typhoon prevention

People often say: nip in the bud. In the face of such a powerful natural disaster, we must not be scared silly by great power. In fact, typhoons can "nip in the bud" like SARS. I have also made a careful investigation on typhoon prevention, which will definitely help you at a critical moment.

First of all, don't stand in low-lying and soft places; Secondly, don't take steep slopes; Thirdly, don't stand in the open air and under trees to prevent lightning strikes; Finally, take refuge in high-lying and solid buildings as soon as possible, such as reinforced concrete buildings. As long as there is awareness of prevention and self-protection, early detection of mountain torrents and decisive transfer of personnel, tragedy can be alleviated or even avoided.

Through a comprehensive investigation of typhoons, I have a superficial understanding. I can't help but sigh: a typhoon has so much destructive power that it must have a lot of energy. It is said that the typhoon's energy is equivalent to 200 times of the global total power generation in one day! If these energy sources were used, there would be no "resource crisis" on the earth.

Oriental Time and Space tells an interesting story: once, the meteorological observatory predicted that a typhoon would land in Guangzhou. After receiving the news, Guangzhou Reservoir immediately drained the water in the reservoir to generate electricity. The typhoon came, and the rainstorm brought by the typhoon filled the reservoir again, and the Guangzhou reservoir generated 8 million kwh of electricity. It seems that a typhoon can do it.

We still need to study typhoons more, spread the knowledge of typhoons to thousands of households, and minimize the probability of casualties and disasters caused by typhoons.

How to save the earth's resource crisis from the huge energy contained in the typhoon? I am very interested in this question!