Why is it always good weather after fog?

Fog is closely related to future weather changes. Since ancient times, the working people of our country have known this truth, and it is reflected in many folk proverbs. Such as:

Huangmei is foggy, rocking the boat without asking for directions. This is to say that the fog at the turn of spring and summer is the harbinger of rain, so the folk have the saying "summer fog and rain". Another example:

The fog is big and no one is seen, and the clothes are boldly washed. "This means that the winter fog is clear, and the autumn fog is also the same. To accurately look at the fog to know the sky, we must also look at the duration of the fog.

Radiation fog is caused by the condensation of water vapor due to the cold weather, so as soon as the temperature rises during the day, it will disappear and the weather will be fine; On the contrary, "if the fog does not disperse, it will rain". If the fog does not disperse during the day, it may be a rainy day the next day, so the folk proverb says: "The fog is not until now, but the rain is heard after the night."

Why is it the same fog, some of it rains and some of it is sunny? This is explained by the knowledge of meteorology. As long as the water vapor content of the lower air is high, the water vapor will condense into fog when the temperature drops sharply at night.

Fog has radiant fog, that is, fog formed under relatively sunny and stable conditions, and as soon as the sun comes out and the temperature rises, the fog will disappear naturally. In this regard, the folk saying is: "The fog is thick in the morning, and the weather will be sunny for a long time."

The sun is in the fog, and the sun is broken. "In the morning the ground is covered with fog, despite the drying of rice. When people see radiation fog, they often "ten fogs and nine sunshines".

These statements are derived. In autumn and winter, after the cold air from the north goes south, with the weather becoming clear and the sun is irradiated, the content of moisture in the air gradually increases, and it is easy to form radiation fog, so the fog in autumn and winter can often predict tomorrow's good weather. In spring and summer, fog is different, it mostly comes from the warm and moist air flow from the sea, and when it hits colder ground, the air below also becomes cold, and the water vapor condenses into fog.

This fog is called advection fog. It is formed by the sudden cold of warm and moist air from the sea that invades the continent. When these warm and humid air currents meet the cold and dry air of the mainland, it will naturally be cloudy and rainy.

So spring and summer fog heralds rainy weather. Fog is so closely related to the weather that you can see how the weather changes by looking at it. However, the above explanations of radiation fog and advection fog are only in general terms.

The relationship between fog and weather is not so simple, and there are many complex contents, so it cannot be rigidly copied, but must be analyzed on a case-by-case basis. In other words, in order to accurately see the fog and know the sky, it is necessary to make multi-faceted observations, analysis, and comprehensive judgments.

In general, there is a lot of fog in autumn and winter mornings, why? We know that saturation is reached when the water vapor contained in the air reaches its maximum capacity. And the higher the temperature, the more water vapor can be contained in the air.

1 cubic meter of air, when the temperature is 4, the maximum amount of water vapor that can be contained is grams; When the air temperature is 20, the maximum amount of water vapor that can be contained in 1 cubic meter of air is grams. If the air contains more water vapor than the amount of saturated water vapor at a certain temperature, the excess water vapor will condense, and when enough water is enough to combine with the tiny dust particles in the air, and the water molecules themselves will stick to each other, becoming small water droplets or ice crystals. The amount of water vapor in the air exceeds the saturation amount and condenses into water droplets, which is mainly caused by the drop in air temperature.

Because all the vapour in the clouds has come down.

Fog occurs on winter mornings, and the weather on this day is generally clear. This is because the sun hits the ground during the day, and a lot of heat accumulates on the ground, and due to the evaporation of water, the warmer air can also hold more water vapor, so there is more water vapor in the air.

As soon as the sun goes down, the heat begins to dissipate into the air, and the temperature of the air close to the ground decreases, and the better the weather, the fewer clouds there are in the sky, and the heat from the ground is not hindered in any way, and the faster it is dissipated, the lower the air temperature will be.

In the second half of the night and in the morning, the temperature of the air on the ground has dropped very low, and at this time, even indoors, we can easily feel much colder than in the first half of the night.

When the temperature of the air near the ground decreases, the water vapor in the air exceeds the saturated state, and the excess water vapor condenses into fine water droplets, which are distributed at low altitudes, and this fog is usually produced near the center of high pressure, so when this kind of fog appears, although the morning is thick with fog, as long as the sun comes out and disperses the fog, there will be clear weather.

The conditions for the formation of fog are cooling, humidification, and condensation nuclei to increase the water vapor content.

A type of fog is formed by radiative cooling, and most of the fog occurs in clear weather, light winds, and near the surface water vapor is relatively abundant and stable, or there is a temperature inversion.

The presence of night and early morning is meteorologically called radiation fog;

The other is the fog formed by the horizontal movement of warm and moist air, passing through the cold ground or water surface, and the water vapor in the air is gradually liquefied by cold, which is called advection fog in meteorology;

Sometimes fog formed by both causes is called mixed fog. It can be seen that these conditions can be met in late autumn and early winter, especially in the morning of late autumn and early winter.

Most of the fog we generally see is a clear and cloudless sky at night, and the ground is strongly cooled, so that the water vapor in the air near the surface condenses into small water droplets and is suspended in the air to form fog, that is, radiation fog. Ten fogs and nine sunny refers to this kind of fog. The conditions required for the formation of such fog are sufficient water vapour in the lower air, strong radiation, and light winds.

The areas that meet these three conditions are generally under the control of cold high pressure or the weather suddenly clears after rain under the control of weak high pressure, and the weather under the control of these two weather systems is mostly good weather. Most of this fog occurs at night or in the morning, and after the sun rises, due to the strong warming of the ground and the destruction of the near-surface inversion layer, the fog dissipates and the sky is still fine. That's what it means.

However, when there is advection fog, steam fog, etc., it is not necessarily sunny weather.

Foggy in the morning means that the humid air contains many small water droplets, and the moist air is saturated moist air when the temperature is increasing.

After the gradual rise, the small water droplets gradually vaporize, so it is often good weather.

Autumn and winter mornings, spring from February to April tend to fog up.

If the ground heat is lost, the temperature drops, and the air is quite humid, then when it cools to a certain extent, a part of the water vapor in the air will condense and become many small water droplets, suspended in the air layer near the ground, and fog will be formed. Both it and clouds are caused by a drop in temperature, and fog can actually also be said to be clouds close to the ground.

The temperature is relatively high during the day, and the air can hold more water vapor. But at night, the temperature drops, and the ability of the air to hold water vapor decreases, so some of the water vapor condenses into a source beam of fog.

Especially in autumn and winter, due to the long nights and the chance of cloudless wind, the ground heat dissipation is more rapid than in summer, so that the ground temperature drops sharply, so that the water vapor in the air near the ground is easy to reach saturation in the second half of the night to the morning and condense into small water droplets, forming fog. In autumn and winter, the morning temperature is the lowest, and the fog is at its thickest.

Conditions for the formation of fog hail know luck:

The conditions for the formation of fog are cooling, humidification, and condensation nuclei. Increase water vapor content. This is formed by radiative cooling, which mostly occurs at night and early in the morning when it is clear, breezy, and the water vapor near the ground is relatively abundant and stable, or there is a temperature inversion, which is called radiation fog in meteorology.

the other is the fog formed by the horizontal movement of warm and humid air, passing through the cold ground or water surface, and gradually cooling, which is called advection fog in meteorology; Sometimes fog formed by both causes is called mixed fog. It can be seen that those who have these conditions are in late autumn and early winter, especially in the morning of late autumn and early winter.

The main reasons why fog sometimes occurs after rain are as follows:

1.After rain, the amount of water vapor in the air is large, and the water vapor evaporated from the surface will also enter the air, resulting in high air humidity and easy formation of fog.

2.After the rain, the temperature drops and the water vapor content in the air decreases, causing the humidity in the air to decrease and fog to form.

3.After rain, the wind speed becomes smaller, the convection is weaker, and the lack of wind convection also makes it easier for fog to form.

4.The surface temperature is lower after rain, and fog is also prone to formation.

The above is the original hail or cause of fog that sometimes occurs after rain, I hope it will help you.

It is a condensation phenomenon that occurs when water vapor occurs in the air near the ground.

The water vapor content in the excavation is prepared in the air near the ground, and the water vapor content in the excavation is abundant. The ground air temperature is low. After the rain, there is a lot of water on the nucleated ground, and it is evaporated, and the temperature is low after the rain, so it constitutes the condition for the formation of fog.

Fog is a small droplet of water that condenses when there is too much water vapor in the air and encounters colder air. On rainy days, the air has high humidity, a lot of water vapor, and low temperatures, so it is easy to fog.

Fog is formed by the condensation of water vapor in the air due to saturation into small water droplets and suspended in the air.

There is a limit to the amount of water vapor that air can hold (dissolved in the air) at a certain temperature, and the lower the temperature, the less water vapor the air can hold.

When it rains, the air humidity increases, and the water vapor content in the air increases. At the same time, rain absorbs some of the heat in the air, causing the temperature of the air to drop. It turns out that the water vapor that can be contained in the air cannot be contained because the temperature drops and the humidity rises, and the excess water vapor will condense into small water droplets, which will appear in the form of liquid in the empty plum.

So, when it rains, it sometimes fogs. When the rain stops, the weather clears, and the temperature rises, the fog clears (the small droplets turn into water vapor again).

In general, there is a proverb that morning fog predicts the weather of the day:

The spring fog is clear, the summer fog falls, the autumn fog frost and wind passes, and the winter fog does not set.

This means that the morning fog of spring indicates that the day will be sunny and the sunrise will be late.

The morning fog in summer indicates that the weather will be rainy on the day.

Autumn morning fog is heralded as sunny days, with low temperatures and frost at night.

The morning fog in winter indicates that the weather will be fine that day, and it will be difficult for the sun to fall in the evening.

When there is a lot of humidity or water vapor in the atmosphere, especially on a sunny day, there is no inverse radiation of rain clouds, and in the second half of the night or morning, the temperature often drops relatively quickly, and the water vapor exceeds the saturated state at this time, it will condense into small water droplets, forming fog on the ground.

This kind of fog is generally formed near high atmospheric pressure, and there are often no rain clouds near high atmospheric pressure, and the sunlight can shine directly on the fog, and the warm sunlight causes the small water droplets in the fog to evaporate, dispel the fog, and the sky will clear. So there is a daily life"Ten fogs and nine sunshines"said.

When there is a lot of water vapor in the atmosphere, in the second half of the night or in the morning, when the temperature drops, when the water vapor exceeds the saturated state, it will condense into fine water droplets, forming fog on the ground. This fog is generally formed near high atmospheric pressure, where there are often no rain clouds. In this way, the sunlight can shine directly on the fog.

The warm sunlight evaporates the small water droplets in the fog, dispersing the fog and the sky will clear. This day tends to be sunny.

Fog can only be produced when the atmosphere is stable due to a light breeze.

When an inversion occurs, the atmosphere is stable, so the inversion is often accompanied by fog.

The inversion layer still exists after the fog, and the weak convection makes the clouds and fog less and the weather clear!!

This is a natural phenomenon, and it can be seen from many facts that it is usually clear in the afternoon when there is heavy fog in the morning.

Yes, it will rain in the morning and sunny in the evening. Nature is Wonderful, and the interpretation of these two words is:

The earth is airy, the sky should not be, and it is said to be foggy;

In the weather, the ground should not be, and it is said that the earth.

Fog and haze are two of the more common weather phenomena. The 1999 edition of Cihai explains: "Fog, the phenomenon of visual range obstruction in the near-earth atmosphere.

It is caused by a large number of suspended small water droplets or ice crystals that cause the horizontal visibility distance to be less than 1000 meters. When the horizontal visibility distance is equal to or greater than 1000 meters, it is called light fog in meteorological observations. Fog has a detrimental effect on traffic and shipping.

雺字 is referred to as the 籀文 of foggy characters. The explanation of Cihai is only the most superficial phenomenon, but the understanding of the ancients is obviously much more profound. After knowing these two words, I looked closely and found the difference between fog and goose.

To put it simply, it is the fog of a sunny day and the fog of a cloudy day: the earth is airy, the sky should not be, there is water vapor near the ground and there are no rain clouds in the sky, so the fog must be clear; The fog is cloudy and foggy, and in the weather, the ground should not be, although the water vapor is pressed from the clouds to the ground, it does not form rain, similar to hazy weather. Although both types of fog are "visual range obstruction phenomena in the near-Earth atmosphere", the reason for their formation is "a world of difference".

Just from the perspective of natural knowledge, it should be said that the ancients were more advanced, more scientific and wiser than us.

The earth is angry, the sky should not be" and "the weather should not be" in the word "should" has a lot of articles, and the "should" is the key to rain. Precipitation is the process by which the weather and the atmosphere meet accordingly. The ancients used the two Chinese characters fog and 雺 to accurately and profoundly discover and describe the connotation of the two special states in the middle of the two ends of yin and yang, and fixed the window for us to peek into the "heavenly machine" of precipitation.

Chinese characters and the Chinese language are condensed with the profound wisdom of the ancient people. The weather and the atmosphere are not only water vapor or fog, nor is it just high pressure or low pressure and all kinds of wind. Meteorology, climate, weather, solar terms, ......Qi not only covers the material and tangible qi referred to by modern science, but also has many levels of things that we are difficult to understand and cannot grasp with the current scientific means.