What color is the sky when it snows?

The sky is a little reddish when it snows.

When it snows, the clouds in the sky are thicker and lower, and the air is humid.

It's also getting higher and higher. The light emitted by street lamps and landscape lamps in the city can be scattered directly or reflected on the ground, shining the light into the sky. Water vapor in the air.

Refracts and absorbs light. The refraction and absorption of long-wavelength red, orange, and yellow light are weak, and the refraction and absorption of short-wavelength blue and violet light are strong.

Climatic characteristics of winter.

"Beginning of winter" means wind and rain, humidity, sunshine, temperature, etc., and it is at a turning point, and the climate is gradually transitioning from autumn to winter. In winter, the sun shines directly on the spot.

Move south to the Tropic of Capricorn and then turn north.

In winter, the Sun has reached the ecliptic longitude of 225 degrees and the Earth is located at -16°19'Declination. Northern Hemisphere Sun Altitude.

Lower, shorter daylight hours. Solar radiation received in the Northern Hemisphere.

Less and less. The stored heat still has a certain amount of energy, so it is not very cold yet. During the fierce winter (when there is light snow on the beginning of winter solstice, and there is no wind in the sunny, there is often a sunny, warm and comfortable "Xiaoyangchun" weather.

The above content reference: Encyclopedia - Winter.

The sky is grayish-white with precipitation, only because the clouds are thick in the air, there is more moisture in the clouds, and all the wavelengths of the sun's rays are scattered. When it snows, people feel that the sky is also white due to the white snowflakes falling.

On snowy days, the clouds are low, and the snowflakes are flying in the air, reflecting some of the light at night. These rays mainly come from the city lights, which can feel a little reddish because the lights are mostly warm tones. In fact, it can be felt this way in the summer when it rains or when the weather is gloomy.

But if it is in a secluded countryside, because there are few lights on the ground, this phenomenon will not be the case.

Temperatures are usually lower at night on snowy days, and the air is thin.

Because of the process of water vapor in the air condensing and falling back to the ground, water is the foundation of the existence of all kinds of life on the earth, and the changes and movements of water have created our world today.

On Earth, water is constantly circulating, the water in the ocean and the ground is heated and evaporated into the sky, and these water vapors move with the wind to other places, and when they encounter cold air, they form precipitation and return to the earth's surface. There are two types of precipitation: one is liquid precipitation, which is rain; The other is solid precipitation, which is snow or hail, etc.

In winter, the temperature is low, the ground temperature is below zero, the temperature of the high-altitude clouds is lower, the water vapor that usually transpires to the sky meets the cold air, can directly condense into small Xiaoice crystals, small snowflakes, when these small Xiaoice crystals increase to a certain extent, the air flow can not support it, it falls from the clouds to the ground, which forms a snow phenomenon. At this time, the snowflakes are fluttering, and the ground is white, and a scene of pink and jade.

Because snow and ice absorb heat when it melts, there is a saying that "snow does not get cold when it falls".

Because of the process of water vapor in the air condensing and falling back to the ground. On Earth, water is constantly circulating and moving, the water in the ocean and on the ground is heated and evaporated into the sky, and this water vapor moves with the wind to other places, and when they encounter cold air, precipitation is formed and returns to the earth's surface. There are two types of this precipitation:

One is liquid precipitation, which is rain; The other is solid precipitation, which is snow or hail, etc.

1. Because the temperature is low in winter, the temperature on the ground is below freezing, and the temperature of the clouds in the upper sky is even lower.

2. The water vapor in the clouds directly condenses into Xiaoice crystals and small snowflakes, and when these snowflakes increase to a certain extent, the airflow can not support it, and it falls from the clouds to the ground, which is snow.

3. If there is a strong updraft, the temperature of the air is relatively high, as if a big hand is holding the snowflakes, the snowflakes will grow longer in the clouds, and the snowflakes will be larger.

The water vapor in the air rises in the air and liquefies in the cold to form raindrops, and when these raindrops are more, the gravitational force is greater than the maximum pressure that the rain cloud can bear, and it will fall, which is rainfall. The snowfall is similar to this, except that the water vapor encounters a particularly cold air flow in the high altitude, at this time, it is not liquefied but directly changed from the gaseous state to the solid state, without going through the liquid transformation, this is called condensation, then the snow is formed, and the latter is the same as the rain above. Therefore, there are 3 conditions that must be met for snowfall: 1. The air is humid and the water vapor is sufficient.

2. There is an updraft. 3. Low temperature.

The reason why it snows in the sky is because when the temperature in the clouds is too low, the small water droplets in the clouds will form ice crystals, and when they fall to the ground and are still ice crystals, it is snowing.

When the amount of water vapor in the air reaches saturation, the excess water vapor will turn into ice crystals or water droplets, and the condensation nuclei in the air can reduce the saturation requirement for water vapor, which will be conducive to the fall of rain and snow.

It is a physical phenomenon, the impact of hot and cold air currents, will make the water vapor in the air suddenly cool, and it will snow.

Snow is the product of condensation when water vapor meets a drop in temperature. Snow falls from the sky under the action of gravity, forming snowfall.

It's snowing in the sky, and it may be that someone has been wrongfully convicted. In ancient China, it was recorded that Dou E's injustice was snowing in summer.

The climate is getting colder, and the water vapor in the sky is solidifying.

When the rain fell, it was cold, and without clothes, it froze into small snowflakes.

The sky has low clouds, reflecting the light of the street lights on the ground.

The sky is red when it is about to rain at night, and black when it rains during the day.

Because it rains during the day because of the accumulation of dark clouds, and at night, if the sun sets immediately in the evening, it is sunset, and the sky is red at sunset (this is caused by the scattering of sunlight from the atmosphere).

In the morning and evening, the sun shines obliquely, passing through the underlying atmosphere, and the dust and water vapor in the atmosphere have a strong scattering effect on sunlight. Among the various wavelengths of sunlight, blue-green light with short wavelengths is easily scattered, and most of the red and yellow light with long wavelengths enter the human eye).

The sky that rained in the evening was red, and the humidity and refractive index of the air on rainy and snowy days allowed the longer wavelength red light in the sunlight to travel farther distances, so that the sky would still appear red after the sun went down.

But it's usually raining at night, and it's dark because it's night.