The weather means

Weather refers to various meteorological changes in the atmosphere of a certain area within a certain period of time, such as temperature, humidity, precipitation, wind speed, wind direction, etc.

Determinants of climate change:

These meteorological changes are determined by various physical and chemical processes in the atmosphere, and the atmosphere is influenced by many factors such as the earth's surface environment, solar radiation, and the earth's magnetic field.

Weather characteristics:

Weather is a complex system with high temporal and spatial variability and uncertainty. Meteorologists observe and study the weather by means of observation instruments, satellite remote sensing and numerical simulation, so as to predict the weather changes in a certain period in the future. This has a very important impact on people's life, production activities, transportation and other aspects.

For example, in summer, if there is expected to be heavy rain, people need to prepare for drainage and flood control in advance; In winter, if a cold wave is expected, people need to take measures to keep warm. In addition, the weather also has an important impact on agriculture, fisheries, energy and other industries. Therefore, it is very important to know and predict the weather.

The principle of weather forecast:

1, data collection:

Meteorological observatories, satellites, radars and other tools are used to collect a large amount of data about the atmospheric environment. These data include temperature, humidity, air pressure, wind speed, wind direction, precipitation and so on.

2. Data processing:

The collected data are processed and analyzed to determine the position, intensity and moving direction of the weather system.

3. Numerical simulation:

Physical and chemical processes in the atmosphere are transformed into mathematical equations by numerical simulation of large computers to predict future weather conditions.

4. Forecast analysis:

According to numerical simulation results and empirical judgment, meteorologists combine real-time meteorological observation data to analyze future weather trends and form weather forecasts.

5. Publish the forecast:

The forecast results are released to the public through TV, radio, internet and other channels to guide people's life and production activities.