The weather is always changing, sometimes fast and sometimes slow. What does it have?

The weather is always changing, sometimes fast and sometimes slow. It reads as follows:

Unpredictability: Weather is a complex system in nature, and its changes are influenced by many factors, including atmosphere, ocean, land and solar radiation. The changes of these factors are often nonlinear, with high complexity and uncertainty. Therefore, it is very difficult to predict the weather accurately.

Periodicity: The weather has obvious seasonality and periodicity. The four seasons are distinct, and the temperature, rainfall and wind direction of each season are different. In addition, the weather is also affected by periodic changes such as day and night alternation and tides.

Randomness: The change of weather has certain randomness. Even under the same meteorological conditions, the weather changes will be different because of some minor disturbances. Therefore, there are some errors in the weather forecast.

Statistics: Although the weather changes randomly, from a statistical point of view, the weather changes regularly. For example, in long-term observation, we can find that the average and probability distribution of some meteorological elements are regular.

Persistence: Weather change is a continuous process. Once started, it will continue. Even if the meteorological conditions change, it will not immediately affect the weather phenomena that have already occurred. For example, a rainstorm may last for several days until all the water evaporates or runs away.

Catastrophe: Although the weather changes have some continuity, they may also be sudden. For example, in some cases, a clear sky may suddenly become gloomy, or a storm may suddenly come. This mutation makes the weather more difficult to predict and control.

In a word, the weather is unpredictable, periodic, random, statistical, persistent and abrupt. These characteristics make weather a very complicated and interesting phenomenon in nature.

Knowledge expansion

Weather refers to the specific state of the atmosphere near the surface in a short period of time. Weather phenomenon refers to various natural phenomena in the atmosphere, that is, the comprehensive expression of the spatial distribution of various meteorological elements in the atmosphere (such as temperature, pressure, humidity, wind, clouds, fog, rain, flash, snow, frost, thunder, hail, haze, etc.). ) in an instant.

The weather process is the change process of weather phenomena with time in a certain area. All kinds of weather systems have certain time and space scales, and they are intertwined and influence each other. The combination of many weather systems constitutes a large-scale weather situation and hemispheric and even global atmospheric circulation. The weather system is always in the process of rebirth, development and extinction, and there are corresponding weather phenomena in different development stages.