A little knowledge about cirrus clouds

Cirrus cloud-Introduction Cirrus cloud is a basic cloud type with white filaments, or white (or mainly white) fragments or narrow strips.

[1] Cirrus is a kind of high cloud, which is the highest cloud in the troposphere. The height of cloud bottom is 4500~ 10000m (in summer, in the south of China, it is sometimes as high as17000m; Winter can be as low as 2000m in the northern and western plateau areas of China). Therefore, before the sun rises to the horizon in the morning or after sunset in the evening, the light will shine on this cirrus cloud hanging in the air without clouds and shadows, and it will show beautiful red or orange light after scattering, which is very common in clear skies in summer.

Cirrus clouds mostly appear in the form of ice crystals, and clouds are white. Because it contains ice crystals, it looks more transparent and brighter, and the clouds in the blue sky will be cleaner and silky. Cirrus clouds-morphological characteristics Cirrus clouds formed by the characteristics of cirrus clouds will also show various shapes because the falling ice crystals pass through different gas layers such as temperature, humidity and wind.

Scattered individuals often have many forms, such as silk thread, ponytail, feather, hook, cluster, flake and so on. Cirrus clouds are scattered clouds with silky structure and silky luster.

Clouds are usually white and have no shadow. Cirrus clouds are mostly in the form of tiny ice crystals, and clouds are white. Because they contain ice crystals, they look more transparent and bright, and usually do not weaken sunlight and moonlight. Clouds in the blue sky will be cleaner and have a silky luster.

Only the thicker part of the cloud can weaken the sunlight and moonlight. Cirrus clouds are usually not thick, thin and scattered, showing a little fibrous clouds, such as feathers, hair, messy silk, or ponytails, with many postures.

The separated scattered clouds have obvious fiber structure, white with silky luster, bright yellow or red near sunrise and sunset, and grayish black at night. Cirrus-Cirrus is very tall and belongs to the Gaoyun family. The height of cloud bottom is 4500~ 10000m, sometimes it can be as high as 17000m or as low as 2000m.

At this altitude, the temperature is very low and there is almost no water vapor. Clouds are made up of tiny and sparse ice crystals, so they are thin and translucent, white and shiny, and often have a silky structure. Because the clouds are too high, cirrus clouds are easy to evaporate and will not reach the ground. Even if small water droplets are produced, they will not feel the rain on the ground, which symbolizes that it will be sunny all day.

Cirrus-the cause of cirrus is due to various reasons, or due to high-altitude convection, often in the form of cumulus; Or because there are cracks on the edge surface of cirrostratus; Or because of the uplift and transformation of cumulus clouds; Or formed by the residual snow in cumulus clouds. It can be seen that cirrus clouds are formed in various ways.

Because cirrus clouds are very thin, sunlight and moonlight can easily pass through, so the light acting on ice crystals has produced many wonderful phenomena, including halo. Because cirrus clouds are composed of ice crystals, they are often white and pale yellow when they are far from the horizon, yellow or yellow-red at sunrise and sunset, and dark gray at night.

[2] Cirrus clouds-Halo phenomenon Because cirrus clouds are very thin, sunlight and moonlight can easily pass through, so the light acting on ice crystals has produced many wonderful phenomena, including halo, which is the fuzzy light around the luminous body. Mao Dun's Where is a Will: "He saw a big halo around the lamp flame ... some gold and silver stars dancing in the halo."

According to the structural characteristics, cirrus clouds can be divided into four categories: cirrus clouds, dense cirrus clouds, hooked cirrus clouds and pseudo cirrus clouds. Cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus (Ci fib) has a fibrous structure, often white, shadowless, silky luster, mostly in the form of filaments, sheets, feathers, hooks, balls, anvil, etc.

Most of them are composed of ice crystals with a diameter of 10- 15 micron. Hairy cirrus clouds are very thin and white, with clear filamentous structure and scattered filaments. They are cirrus clouds with obvious filamentous structure, often scattered and isolated in the sky like feathers and loose hair, or obliquely crossed with the ground in strips.

The shadows of the sun and the moon through the clouds are obvious. The appearance of cirrus clouds mostly indicates that the weather will be fine, so there is a saying that "the gossamer flies out of the sky, and it will be fine after a long time."

If cirrus clouds become thicker and richer, or even develop into cirrostratus, it indicates that the weather will change. The difference between cirrus and hooked cirrus is that cirrus is like feathers and loose hair.

Hook cloud is like a small comma sleeping in the air. Cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus cirrus

Most of them are composed of ice crystals with the diameter of 10- 15 micron, which are thick sheet cirrus clouds with obvious filamentous structure at the edge. A thin disk can see the sun and the moon clearly, a thick disk can only see the positions of the sun and the moon, and the thickest disk can cover the sun and moonlight, which is gray at this time.

Its shape is related to high-altitude convection. The appearance of cirrus indicates that the weather is stable, but if it continues to develop systematically and evolves into cirrostratus, it indicates that the weather will change.

The dense cirrus cloud is thick, the thin part is white, the thick part is slightly shaded, and the fibrous structure at the edge is still obvious. Clouds are dense and clustered together. If there are more clouds, there may be incomplete dizziness.

Cirrus is a kind of cirrus. Its name comes from Latin, which means curly hook. Hook clouds, also known as cauda equina, usually appear sparsely in the troposphere at an altitude of 7 kilometers.

Usually the temperature is between 40 and 50 degrees Celsius. When a warm front or blocking front approaches, hook clouds will appear. This means the arrival of rain belt. Cirrus clouds have fibrous structure, usually white, shadowless, silky luster, mostly in the form of silk strips, sheets, feathers, hooks, balls, anvil and so on.

Most of them are composed of ice crystals with a diameter of 10- 15 micron. Hook clouds are very thin and white. Clouds are often arranged in parallel, with small hooks or clusters at the top and long tails at the bottom, much like comma symbols.

The tail of hook clouds is usually caused by wind shear when ice crystals fall in the clouds. Hook clouds often appear scattered. If it moves to the sky systematically and continues to develop, it indicates that there will be weather system influence, and even rainy weather may occur. Therefore, there is a proverb among the masses that "clouds hang in the sky and rain falls underground".

This is a fibrous structure, usually white, unshaded and hairy.

2. Common sense about the cloud

Classification of the causes of clouds Clouds are formed in areas where moist air rises and meets cold air.

This may occur in the following points: frontal clouds: the warm air mass on the front rises into clouds; Cyclone cloud: cloud advection cloud caused by updraft in cyclone center; When the air mass passes through the cold underlying surface, such as cold water against convective clouds; Cloud topographic clouds caused by air convection; When the air rises along the normal terrain, there are three main forms of clouds: cumulus, stratus and fibrous cirrus. Scientific classification of clouds: according to the shape, composition and formation reasons of clouds, clouds are divided into ten major cloud genera.

These ten cloud genera can be divided into three cloud systems according to the height of cloud bottom: high cloud system, middle cloud system and low cloud system. Another classification method is to separate cumulonimbus clouds from low cloud systems, which is called direct expansion cloud systems.

The cloud base height used here is only applicable to mid-latitude areas. (In addition to Britain and the United States, countries such as the World Gas Organization generally adopt the international system of units. )

According to these cloud phases, people have some reliable experience in forecasting the weather changes in the future 12 hours. For example, if the fluffy cumulus clouds are very scattered, it can be said that it is good weather, but if the clouds expand or have new development, it means that there will be a sudden rainstorm.

The lightest and tallest clouds are called cirrus clouds. This kind of cloud is very thin, through which sunlight can shine on the ground, and the light and shadow of houses and trees are still very clear.

Cirrus clouds are floating in wisps, sometimes like a white feather, sometimes like a wisp of white silk thread. If cirrus clouds are arranged in a row in the air, like fish scale waves caused by a breeze blowing over the water, it becomes cirrus clouds.

Cirrus clouds and cirrocumulus are very high, where there is little water, which generally does not bring rain and snow. There is also a kind of white clouds like cotton balls, called cumulus clouds.

They are often scattered in the sky about two kilometers, reflecting the bright sunshine, and the clouds are surrounded by golden brilliance. Cumulus clouds appear in the morning, most in the afternoon, and gradually dissipate in the evening.

On sunny days, we occasionally see a kind of cumulus. Altocumulus clouds are groups of oblate clouds, which are arranged in a balanced way, with a blue sky in the middle, which looks like snow-white sheep on the grassland from a distance.

Cirrus, cirrocumulus, Cumulus and Cumulus are all beautiful. When the continuous rain and snow came, cirrus clouds were gathering, and a thin layer of clouds gradually appeared in the sky, as if covered with a white silk curtain.

This cloud is called cirrostratus. Cirrostratus is advancing slowly, and the weather will turn cloudy.

Then, the clouds are getting lower and thicker. Looking at the sun or the moon through the clouds is like a layer of frosted glass. At this point, the scroll tower has been renamed. It's time to call it a high-level cloud.

There are high clouds, and it often rains or snows within a few hours. Finally, the clouds are getting lower and thicker, the sun and the moon are hidden, and the sky is covered with dark gray clouds.

This cloud is called nimbostratus. As soon as nimbostratus was formed, continuous rain and snow came.

In summer, before the thunderstorm comes, you will first see the faint cumulus clouds in the sky. If light cumulus clouds rise rapidly to form a tall Yunshan, and the peaks compete with each other and go straight to the zenith, they will develop into thick cumulus clouds.

When the cloud top is composed of ice crystals, it has a white filamentous structure, often in the shape of anvil or horsehair, and becomes a cumulonimbus cloud. The cumulonimbus cloud grows higher and higher, the cloud bottom gradually turns black, and the Yunfeng gradually blurs. Soon, the whole Yunshan collapsed and dark clouds filled the sky. In an instant, thunder rumbled and thundered, and then it rained heavily, sometimes bringing hail or tornadoes.

We can also infer the weather from the brilliant phenomena on the clouds. Around the sun and the moon, sometimes beautiful colored apertures appear, the inner layer is red and the outer layer is purple.

This aperture is called halo. Solar and lunar halos often appear on the cirrostratus, and the high-rise clouds behind cirrostratus and nimbostratus are signs of heavy rain.

So there is a saying that the sun is dizzy in the middle of the night and the moon is dizzy at noon. When cirrostratus is accompanied by dizziness, the weather will get worse.

There is also a colored halo smaller than the halo, called "Hua". The arrangement of colors is purple and red, just the opposite of halo.

Rihua and Yuehua are mostly produced at the edge of cumulus clouds. From small to large in central China, the weather tends to be fine.

The central region of China is getting smaller from big to small, and the weather may turn rainy. In summer, after the rain clears, a colorful arc is often hung on the cloud curtain opposite the sun. This is a rainbow.

People often say: "The east rainbow thunders and the west rainbow rains." If the rainbow is in the east, it will thunder and not rain; The rainbow is in the west and there will be heavy rain.

There is also a cloud color, which often appears in the early morning or evening. The sun shone all over the sky and dyed the clouds red. This cloud is called Xia Xia.

The morning glow is in the west, indicating that rainy weather is attacking us; The sunset glow in the east means that the weather has been fine in recent days. Therefore, there is a proverb "Don't go out at sunrise, but go to Wan Li Road at sunset".

Clouds absorb heat from the ground and reflect it back, which helps to keep the earth warm. However, clouds also reflect sunlight directly back into space, which has a cooling effect.

Which effect is dominant depends on the shape and location of the cloud. There are many clouds on the earth. Because clouds reflect and scatter electromagnetic waves in all bands, their colors are gray. When clouds are thin, they are white. But when they become too thick or too dense for sunlight to pass through, they may look gray or black.

More than ten kilometers from the ground, the closer to the ground, the higher the temperature and the denser the air; The higher the altitude, the lower the temperature and the thinner the air. On the other hand, the water surface of rivers, lakes and seas, as well as the moisture of soil, animals and plants, evaporate into the air at any time and become water vapor.

After water vapor enters the atmosphere, it turns into clouds to cause rainfall, or condenses into frost dew, and then returns to the ground, permeates the soil or flows into rivers, lakes and seas. Later it will evaporate (vaporize) and then condense (condense) and drop.

It goes on and on. After the water vapor enters the lower atmosphere from the evaporation surface, the temperature here is high and there is much water vapor. If the hot and humid air is lifted, the temperature will gradually decrease, and when it reaches a certain height, the water vapor in the air will reach saturation.

If the air continues to be lifted, there will be excess water vapor. If the temperature there is higher than 0℃, the excess water vapor will condense into small water droplets; If the temperature is lower than 0℃, excess water vapor will condense into small ice crystals.

When these small water droplets and small ice crystals gradually increase to a level that can be recognized by human eyes.

3. Prose about Juan Yun

Through the weather forecast, we can know the weather situation of a certain day accurately. But have you ever thought? Now is the tourist season when birds are singing and flowers are fragrant and grass is flying. If you travel in other places and there is no weather forecast around you, what should you do to avoid the embarrassment of getting wet by the rain? Today, I will teach you a trick to recognize the weather: look at the clouds, and we will benefit a lot.

Morphological changes of clouds, height and thickness, weather signs

Cirrus clouds are like feathers and silk tulle, and the tallest and thinnest clouds are floating continuously, symbolizing the sunshine.

Cirrocumulus is like a scale wave on the water, a cirrus cloud. It is very tall and thin, and there is no rain or snow.

Cumulus clouds, like cotton balls, appear in the morning and dissipate about 2 000 meters at night. The weather is fine and the air is thin.

Cumulus clouds are like white sheep on the grassland, oblate and neatly arranged.

What do you know about fog?

If the air near the ground is cooled to a certain extent under the conditions of sufficient moisture, breeze and stable atmosphere, the moisture in the air will condense into tiny water droplets suspended in the air, which will reduce the visibility of the ground. This weather phenomenon is called fog. Fog is more common in spring from February to April. When the visibility in the atmosphere is lower than 1 km due to the condensation of suspended water vapor, meteorology calls this weather phenomenon fog.

Conditions for fog formation: cooling, humidifying and increasing water vapor content.

Fog types: 1, radiation fog 2, advection fog 3, mixed fog 4, evaporation fog 5 and smoke.

Why is the fog white?

Experiments show that when white light shines on a transparent object, the transmitted light is mainly the same color as the transparent object, and all other colors are absorbed by transparent body. If a transparent object can transmit all colors of light, then the transparent body is colorless, such as ice. But when water turns into fog, many reflecting surfaces are formed. At this time, light can't penetrate, but is reflected, that is to say, all colors of light are reflected, so the fog becomes white.

5. Know little about science

1. According to China's meteorological regulations, rain with a precipitation of more than 50 mm in 24 hours is called "rainstorm". According to its precipitation intensity, it is divided into three grades, that is, the 24-hour precipitation is 50~99.9 mm, which is called "rainstorm"; /kloc-the area below 0/00 ~ 200 mm is "rainstorm"; More than 200 mm is called "rainstorm".

Second, choose one

Third, choose C.

Fourth, correct. This is the truth of sea water drying salt. The water in concentrated brine is evaporated (or boiled) into steam and diffused into the air, leaving salt.

5. 1, and the alcohol should not exceed 2/3 of the volume of the alcohol lamp at most;

2. Be sure to light alcohol lamps with matches, and don't light each other;

3. Heat the object with the outer flame of the alcohol lamp flame;

Don't extinguish the flame by blowing it out, but cover it with a lamp cap.

5. After the flame goes out, remove the lamp holder and cover it again. When not in use, the wick should not be exposed to air.

Cumulus clouds are usually associated with weather.

Seven, cirrus is very high and belongs to the Gaoyun family. The height of cloud bottom is 4500~ 10000m, which is cirrus.

Sometimes it can be as high as 17000m or as low as 2000m. At this altitude, the temperature is very low and there is almost no water vapor. Clouds are made up of tiny and sparse ice crystals, so they are thin and translucent, white and shiny, and often have a silky structure. Because the clouds are too high, cirrus clouds are easy to evaporate and will not reach the ground. Even if small water droplets are produced, they will not feel the rain on the ground, which symbolizes that it will be sunny all day.

Eight, 100 grams of water can dissolve () milligrams of water. Your problem needs to be studied.

6. Prose about Juan Yun

Through the weather forecast, we can know the weather situation of a certain day accurately.

But have you ever thought? Now is the tourist season when birds are singing and flowers are fragrant and grass is flying. If you travel in other places and there is no weather forecast around you, what should you do to avoid the embarrassment of getting wet by the rain? Today, I will teach you a trick to recognize the weather: look at the clouds, and we will benefit a lot. The shape of the cloud changes, the name of the cloud, the height and thickness of the cloud, the weather sign, the feather like silk yarn of cirrus cloud, which symbolizes that the highest and finest scale waves of the sunny cirrus cloud are floating in groups. Cirrus clouds are tall and thin without rain and snow. Like cotton balls, they appear in the morning and dissipate about 2000 meters at night. The sunshine is mild, and cumulus clouds are like white sheep on the grassland, oblate and neatly arranged.

7. Does anyone know anything about clouds in nature?

Air containing water vapor rises into the air to cool, and the water vapor becomes small water droplets or small ice crystals. Water droplets and ice crystals reflect sunlight, which is what we see as white clouds. If the airflow rises slowly, it will form a strip cloud; If the airflow rises faster, we will see thick and fluffy clouds.

There are three types of clouds, which appear at different heights in the atmosphere. According to their shapes, people call them:

1? Cirrus-like feathers, located at the highest point.

2? Cumulus clouds-fluffy clouds like cotton, located in the middle layer.

3? Stratocumulus-a large, thick cloud that is closest to the ground.

Please observe and learn more in your daily life, learn more about clouds, and cultivate your ability to see clouds and know the weather.

Height of cloud

Cirrus clouds are about10000m high.

Clear sky short list

Types of clouds

Morphological changes of clouds, height and thickness, weather signs

Cirrus clouds are like feathers and silk tulle, and the tallest and thinnest clouds are floating continuously, symbolizing the sunshine.

Cirrocumulus is like a scale wave on the water, a cirrus cloud. It is very tall and thin, and there is no rain or snow.

Cumulus clouds, like cotton balls, appear in the morning and dissipate about 2 000 meters at night. The weather is fine and the air is thin.

Cumulus clouds are like snow-white sheep on the grassland, oblate and neatly arranged, about 2,000 meters thin and clear.

cirrostratus

Cirrus clouds gather and move forward, like white silk curtains covering the sky.

Sunny to cloudy

altostratus

Cirrus clouds are getting thicker and thicker, like ground glass covered in the sun.

It will rain and snow.

Cloud

The upper clouds become thicker, the dark gray clouds are densely covered, and the sky is lower.

Continuous rain and snow weather

cumulonimbus

Cumulus clouds quickly form tall Yunshan, and the sky is lower with dark clouds.

Thunderstorm hail

A brief list of cloud brightness

There are 10 cloud forms, in which the word "product" means that the shape of the cloud is massive (regardless of size) and the word "layer" means that the sky is full of gloomy clouds. Each type gives the approximate height of distribution, and the higher the cloud, the better the weather. In the polar regions, the same type of clouds will appear in the sky at lower altitudes.

Cirrocumulus: Small round cumulus clouds that look like ripples are often called "fish scale sky". Usually, the altitude is between 5 000 and 8 000 meters, which usually indicates sunny weather.

Altocumulus: Similar to cirrocumulus, it means good weather, but it covers a wider area, and the clouds are thicker and dark white. It usually appears after heavy rain and is suspended at an altitude of 5 000~6 000 meters.

Cumulonimbus: It's a low-level Lei Yun with dark clouds. The tower cloud can be as high as 6,000 meters, and the flat cloud at the top is called anvil cloud. Cumulonimbus clouds often bring strong storms and lightning. The upper layer resembles a false cirrus cloud and the top layer resembles a false rain cloud.

Cumulus: It is easy to identify, fluffy white clouds, like floc, floating in the air. If we are separated, it will mean another beautiful sunny day, but if it gets bigger and bigger and there are more and more front ends, it is likely to bring a sudden rainstorm. Cumulus clouds in the blue sky at sea usually indicate that they are not far from land, and the height is generally not more than 2500 meters.

Cirrus: a high-level bunchy cloud formed by ice crystals, which is why it looks pure white. Often called ponytail cloud. They usually mean sunny weather, 5000-9000 meters high.

Cirrostratus: It is made of ice particles and looks like white clouds. These are the only clouds that glow around the sun or the moon. If cirrostratus expands, it means the weather is fine; If cirrostratus shrinks, it means it will rain; If the sky is covered with cirrus clouds, the sky above the cirrus clouds will darken and gradually form a cirrocumulus, which indicates the coming of rain and snow.

High-level cloud: It looks like a gray curtain in the sun or moonlight. If wet air approaches, the cloud disk disappears, and the clouds become thicker and darker until it rains, and the height can reach 2500 ~ 6000 meters.

Nimbostratus: It's a low-level dark cloud hanging in the air, which means it will rain within 4 hours, usually lasting for several hours.

Stratocumulus: A low-level tiled cloud that usually covers the whole sky. Clouds are thin and sunlight can pass through. They may bring thunderstorms, but they usually disappear in the afternoon, leaving a clear and bright blue sky. The height is less than 2500 meters.

Stratus clouds: clouds are the lowest, hanging in the air like dense fog. When they first appeared, they were often mistaken for mountain fog. They are not natural rain clouds, but they can also form Mao Mao rain. If it gets thicker and thicker at night and covers the morning sky, it will usually be sunny and the height will not exceed 2500 meters.

troposphere

The height range from the surface to 8 to 15 km is called the troposphere.