How the weather is formed, how the weather forecast is formed

Usually wet weather is caused by the resurgence of the weather. The phenomenon of resurgence is also called resurgence, and this phenomenon mainly occurs on the ground floor of the room. There are two reasons for the resurgence of the weather.

In the first case, the cold air has just left and the weather is starting to warm, but the surface temperature is still low. At this time, if the weather is humid and the relative humidity of the air is above 90%, the warm and humid air flow outside enters the room, and when it encounters the ground with low temperature and smooth and does not absorb water, it will condense into water, and a large number of it will gather on the floor and wall to produce the phenomenon of re-damp or damp re-dampness, just like sweating. Once the weather is sunny and dry, the phenomenon of resurgence can be eliminated.

In the second case, the water in the foundation soil under the floor cushion rises through capillary action and the vapor water penetrates upward, making the floor material moist and deteriorating to make the whole room moist. In general, the rainy season, when the weather warms up at the turn of spring and summer, is the first case.

Poor or poor air flow is the main factor in the formation of haze.

The air doesn't move, so tiny particles collect in the air, which is why the smog dissipates as soon as the air gets cold.

Car exhaust emissions: There are more and more cars in the city, and it can be seen from the number of parking spaces that the more cars there are, the more exhaust emissions there are, and naturally the air quality will get worse and worse, resulting in haze weather.

The humidity in the air is too low, and people will carry dust on the ground when they move.

Weather forecasting uses the law of atmospheric changes to form the weather conditions in a certain period of time in the future according to the current and recent weather conditions.

Weather ForecastWeather Forecasting is based on the analysis of satellite cloud images and weather maps, combined with relevant meteorological data, topographic and seasonal characteristics, and mass experience.

For example, the satellite cloud image of China's ** meteorological observatory was taken by the "Fengyun-1" meteorological satellite made in China. The use of satellite cloud imagery** for analysis can improve the accuracy of weather forecasting.

Weather forecasting is an important means for meteorological work to serve the national economy and national defense construction. However, due to the confusion of atmospheric processes and the fact that the current source cavity does not have a thorough understanding of atmospheric processes in science, there is always a certain error in the forecast of weather hailstorms.

History of Weather Forecasting:

Around 650 B.C., the Babylonians used the appearance of clouds to ** the weather. Around 340 BC Aristotle described different weather conditions in his Treatise on Celestial Phenomena. The Chinese had a record of weather forecasting at least around 300 BC.

Ancient weather forecasts mainly relied on certain weather phenomena, such as people observing that there was often good weather after sunset. Such observations accumulate to form weather proverbs. However, many of these proverbs were later proven to be incorrect.

Beginning in the 17th century, scientists began to use scientific instruments (such as barometers) to measure weather conditions and use this data to make weather forecasts. But for a long time, people could only use local meteorological data to make weather forecasts, because people could not quickly transmit data to distant distances. It was only after the invention of the telegraph in 1837 that people were able to use large areas of meteorological data for weather forecasting.

Meteorology developed rapidly in the 20th century. Humanity's understanding of atmospheric processes is also becoming clearer. In the 1970s, digital weather** emerged with the development of computer hardware and has grown rapidly, and is now the most dominant way of forecasting the weather.

The above content reference: China Meteorological Administration - the birth of weather forecasting.

1. The law of temperature change in a year:

Northern Hemisphere: July with maximum land temperature and January minimum temperature; The highest temperature in the ocean is August, and the lowest temperature is February.

Southern Hemisphere: January with the highest temperature on land and the lowest temperature in July; The highest temperature in the ocean is February and the lowest temperature is August.

2. The law of temperature change in a day:

Temperature changes are mainly influenced by sunlight.

When the sun is bigger, the temperature rises faster after 9 o'clock; If it is cloudy or cloudy, the temperature rises more slowly, but generally reaches its highest at around 13:00 noon and then slowly decreases to a minimum at 5 am and 6 am, and then starts to rise slowly.

3. How does the temperature change in different parts of the world?

From the equator to the poles, the temperature gradually decreases, because the solar altitude angle is smaller throughout the year in the polar regions, so less solar radiation energy is obtained.