How can satellite cloud images help people resist typhoons and floods?

since the landlord doesn't want what was searched in baidu, I guess you are not an ordinary middle school student, right? Or someone who does similar research in universities or other places? Anyway, I guess you already know the obvious knowledge, right? Then I suggest that you don't always come to Baidu to ask questions. You should make more use of periodical network or China Knowledge Network to see how others study this issue. After all, the articles published there still have some depth. Below is an article I found related to your question, you can refer to it.

application of satellite cloud picture in flood control

satellite cloud picture is characterized by continuity, real-time performance and high frequency. These quantitative information have played an important role in weather forecast, environmental and natural disaster forecast, especially in the monitoring of local floods. On satellite cloud images, the changes and movements of cloud clusters and cloud systems are

intuitive reflections of atmospheric circulation and the interaction between the atmosphere and the ground. A careful analysis of the characteristics of cloud systems in different periods can clearly

understand the occurrence and development process of weather systems of various scales in the atmosphere,

and thus explore the laws and mechanisms.

Determine the relative height of cloud top

according to the brightness and humidity of infrared satellite cloud images, use model identification technology and other judgments, and combine

historical data to determine the type of cloud: frontal cloud system, thunderstorm cell,

or severe tropical storm, and their precipitation intensity and savings time difference

are very different. In this way, the regional scope and intensity of precipitation as well as the development or movement of rain < P > areas can be predicted. In the flood control work, the satellite cloud image

is mainly analyzed and applied in the following aspects:

(1) Analysis of typhoon cloud system

Through the satellite cloud image, we can judge the

trend of the occurrence and development of the outgoing wind, the landing position and the whole process of its weakening into a tropical depression

after landing. Through meteorological cloud pictures, people can find the trend of typhoon

wind earlier, and can accurately determine its position and intensity, so as to

predict its development and changes such as moving direction and moving speed. Therefore, satellite cloud images

have become a very effective

tool for monitoring typhoons and forecasting their moving paths, especially for typhoon positioning.

Satellite cloud images can also be used to monitor and record all typhoons and their trajectories

every year, and to establish a typhoon database, analyze and compare them, study their evolution rules

, and record their rainfall and disasters.

(2) Analysis of rainstorm cloud system

According to the relevant data, when the rainstorm cloud cluster develops to the mature stage, when cloud top temperature is at -6~-7℃, it will

appear heavy rainstorm; When the temperature in cloud top temperature is -7~-78℃, there will be < P > heavy rain. While when the temperature in cloud top temperature is below -78℃, there will be torrential rain < P > to torrential rain. Heavy rain is very important in flood control work.

Heavy rain is the main cause of flood, and short-duration and high-intensity heavy rain can easily form a flood process. Through the analysis of cloud images before several rainfalls, it is found that there are large-scale rainfall cloud clusters in the upper reaches of Xinlicheng Reservoir, Yitong River Basin and its surrounding areas in Yitong County, Siping area, and they contain a lot of water vapor. After analysis, it is found that the temperature of cloud top is generally between -6~-7℃; When the water vapor content is 3~5 mm, it is possible to have heavy rain to heavy rain in the basin. Compared with the actual situation, the rainfall in the place with the largest rainfall reaches more than 9 mm, generally more than 1 mm or dozens of mm. For example, there was a rain on July 23, 28. The rainfall at Yidan Station was 92.2 mm, and it reached 91.1 mm； within 2 hours from 15

to 17: . The

rainfall at Leshan Station is 74. mm, and it reaches 72.9 mm in two

half hours from 14: 3 to 16: . On July 15th, 28, however, the rainfall measured by relevant stations was generally about

5 mm, and the maximum rainfall was 79.8 mm；; On July 31st, 28, there was a rainfall, and the rainfall measured by relevant stations was generally about 45 mm, and the maximum rainfall was 64.2 mm. The minimum

rainfall is 32. mm ..

(3) Analysis of local clouds

Using the cloud image receiving system, we can monitor not only the movement track of large rain clouds, but also the locally generated rain clouds and their rainfall. Generally, we will pay more attention to typhoon clouds, cyclone clouds or

large-scale rain clouds, while the possibility of paying attention to rain clouds generated in a short time by local areas is

small or even ignored. However, the locally generated rain clouds often < P > bring unexpected disasters, such as local rainstorm or hail.

The cloud image at 17: 3 on August 23rd, 28 shows that only

there is a cloud over Changchun. The sky adjacent to Changchun

Siping area in the south, Jilin area in the east and Songyuan area in the west

is clear and Wan Li, without a cloud. The cloud image at 18: on August 23, 28 shows that there is a local cloud cluster in Siping < P > area at the junction of Liaoning and Jilin. In the following period (18: ~ < P > 2: ), the cloud was constantly strengthened and expanded, and gradually moved northward. At 2: 3, it met and merged with the clouds over Changchun area and strengthened again; Finally, rainfall occurred in Yitong County in the north of Siping area.

By analyzing the cloud images from 19: to 2: ,

it is found that the cloud contains a lot of water vapor, which may cause heavy rain.

Especially the analysis of the cloud image at 2: on August 23rd, 28 shows that the precipitation content in the cloud image is 3~5 mm. After the rainfall < P >, from 2: pm to 22: pm on August 23rd, 28, the rainfall of Yitong Hydrological Station reached 38.8 mm, and the average rainfall of Yitong River Basin was 9.3 mm

(4) Comparative analysis

Through the analysis of several major rain clouds in 28, it is found that: ① the cloud center corresponds to the rain area center. Generally speaking, the range of rainstorm cloud cluster corresponds to the < P > precipitation area, and the cloud cluster center also has a good correspondence with the < P > precipitation center. When the temperature in cloud top temperature is lower than

6℃, rainstorm weather usually occurs in the basin. When cloud top temperature

is below -7℃, there will be heavy rain. ② rainstorm and cloud

move in the same direction. ③ The cloud intensity is consistent with the rainfall intensity < P >. The rainfall intensity obtained from the analysis of rainfall clouds is basically consistent with the rainfall intensity measured in the field

after rainfall. Clouds have an excellent indication function for judging the increase or decrease of rainfall

intensity in a short period of time. When the

temperature at the top of the clouds increases and the range of the clouds decreases, the cloud intensity will weaken.

At this time, it often indicates the decrease of rainfall intensity. When the rainstorm clouds disappear, it will be lost.