Medium clouds form at an altitude of 2000m to 6000m. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 info They are made up of small drops of water that are overfrozen.

●Altocumulus (AC)

Altocumulus clouds are small, well-defined, and often oblate, tile-shaped, fish scales, or undulating dense stripes. Arranged in groups, rows, and waves. Most clouds have an apparent width angle of 1-5°. Sometimes it can occur at two or several heights. Thin patches are white and thick patches are dark gray. On thin Altocumulus clouds, there are often rainbows around the sun and moon, or rings of red on the outside and blue on the inside. Altocumulus can evolve with Altostratus, Stratocumulus, and Cirrocumulus. Altocumulus can be further divided into 6 categories:

1 Altocumulus translucent (Actra): The color of the cloud patch varies from white to dark gray, and the thickness varies greatly, even if it is the same cloud, and each part may also be slightly different. The individuals in the clouds are distinct, and the arrangement is generally quite regular, but the transparency of each part is different. The blue sky can be seen in the cloud gaps, and even if there are no cloud gaps, the thin parts of the clouds are relatively bright.

2 Altocumulus occultus (ACOP): continuous Altocumulus clouds, at least most of which have no gaps, and the clouds are dark and irregular. Because of the thick thickness of the clouds, the individuals are dense and almost completely opaque, but the individual clouds at the cloud base can still be distinguished.

3 Altocumulus lenticular: Altocumulus is scattered in the sky, oval or pod-shaped, well-defined, and the clouds are constantly changing.

4 Altocumulus cumulus (accug): This type of Altocumulus is formed by the extension of cumulonimbus clouds and cumulus congestus. In the initial generation stage, it resembles Altocumulus occultus.

5 Altocumulus flocculus (ACFLO): Clusters resembling small cumulus patches, without a base, and the individuals are broken like cotton wool, mostly white.

6 Altocumulus cast: vertically developed cumulus clouds, juxtaposed in a line from a distance, with a common horizontal base and a prominent convex top, like a castle. The cloud is smaller than Stratocumulus castiformis.

● Altostratus (AS, Altostratus)

A cloud curtain with a striped or stranded structure, sometimes more uniform, grayish or gray in color, sometimes slightly blue. In the thinner part of the clouds, you can see the faint outline of the sun and the moon, which looks like it is separated by a layer of frosted glass. If the cloud is thick, the base is darker, and the sun and moon cannot be seen. Due to the different thickness of the clouds, the brightness and darkness of each part also varies, but there is no significant undulation of the cloud base. Altostratus clouds can rain and snow continuously or intermittently. If there is a small amount of rain (snow) sagging, the striated structure of the cloud base can still be distinguished. Altostratus is often formed by thickening of Cirrostratus or thinning of Nimbostratus. Sometimes it can also evolve from Altocumulus opaus. In the southern part of China, sometimes the upper or central part of the Cumulonimbus cloud extends and can also form Altostratus, but it does not last long. Altostratus can be further divided into 2 categories:

1 Translucent Altostratus (Astra): Thin and uniform clouds with an off-white color. Through the clouds, the outline of the sun and moon is blurred, as if separated by a layer of frosted glass, and there is no shadow of objects on the ground.

2Altostratus occult clouds (ASOP): Clouds are thicker and vary in thickness. The thick part is invisible to the sun and moon through the clouds; The thin part is brighter, and the wisp structure can be seen. It is gray in color, sometimes with a bluish tinge.

Low Cloud Clan

Low clouds are formed in the atmosphere below 2000m. These include dense grey Stratus, Stratocumulus (discontinuous Stratus) and dense grey and rainy Nimbostratus. Stratus clouds are grounded and are called fog.

●NimbostratusA thick, uniform precipitation cloud that completely obscures the sun and the moon, is dark gray, and is spread throughout the day, often with continuous precipitation. If rain (snow) is formed at the base of the cloud due to precipitation, the cloud base appears chaotic and has no clear boundary. Nimbostratus is mostly formed by Altostratus, and sometimes it can also evolve from Altocumulus occultus and Stratocumulus opacus. Nimbostratus can be further divided into 2 categories:

1 Nimbostratus (ns): The cloud body is evenly layered, covering the whole day, completely covering the sun and moon, dark gray, often accompanied by broken rain clouds at the base, and continuous rain and snowfall.

2 Broken Nimbus (FN): Low, broken clouds, gray or dark gray. Constantly breeding, changing shapes and moving fast. Initially isolated and separated, they can be gradually merged. It usually occurs under precipitation clouds during or before or after precipitation.

●Stratocumulus (SC) is a group or layer of clouds, often arranged in rows, groups, or waves, of clumps, lamellae, or strips. The individual clouds are quite large, and most of them have an apparent width angle greater than 5° (equivalent to the apparent width of three fingers at an arm's length). Clouds are sometimes covered throughout the day, sometimes sparsely distributed, often grayish-white, often with some parts darker. Stratocumulus clouds can sometimes rain and snow, but are usually smaller. In addition to being directly generated, Stratocumulus can also evolve from Altocumulus, Stratus and Nimbostratus, or from Cumulus and Cumulonimbus extended or flat. Stratocumulus clouds can be further divided into 5 categories:

1 Translucent Stratocumulus (SCTRA): the thickness of the cloud layer varies greatly, and there are obvious gaps between the cloud blocks; Even without gaps, most of the cloud edges are bright.

2Stratocumulus occultus (SCOP): a continuous layer of cloud, composed of a large shady striped axis or clump, without gaps, with a distinct undulation at the base. Sometimes it doesn't have to be all day.

3 Cumulus stratocumulus (sccug): Stratocumulus formed by the expansion of cumulus clouds, cumulonimbus clouds due to the presence of stable air layers above, or the collapse of the cloud top. It is mostly gray streaked, and often has cumulus features at the top. In the evening, cumulus stratocumulus can sometimes form without going through the cumulus phase.

4 Stratocumulus cast: Vertically developed cumulus-shaped clouds, juxtaposed on a line, with a common base edge, a prominent convex top, which looks like a castle from a distance.

5Stratocumulus lenticularis (sclent): thick in the middle and thin at the edges, shaped like a pod or a fusiform cloud. The individuals are distinct and separated.

●Stratus (ST, Stratus)

Low, uniform clouds, like fog, but not grounded, gray or grayish-white. In addition to direct generation, Stratus can also be slowly lifted by fog layers or evolved from Stratocumulus clouds. Drizzle or rice snow can fall. Stratus clouds can be further divided into 2 categories:

Stratus 1 (st): Low, uniform clouds, like fog, but not grounded, gray or grayish-white.

Stratus fractus 2 (FS): irregular loose fragments of variable shape, gray or grayish-white. Formed by stratus splitting or uplifted by fog. Stratus fractus in the mountains can also be generated directly sooner or later. -----introduction

That's right, this butterfly is a butterfly, and the butterfly in the jungle is a natural enemy, and this is the figure of the Great Elder level in the Cloud Butterfly Tribe in the Trailing Cloud.

Elder Yun walked up step by step, looking at Yin Shan's trembling body, the lewd smile on his face became even stronger.

Anything happens on the field on the track cloud, nothing cares. He doesn't care if he kills, let alone whatever, not to mention that he is the Great Elder in the Elders' Pavilion, the Great Elder, who in the Cloud Butterfly Clan dares not to go with him?

"You don't ,,, come here, I'm going to do it if I come over again." Yin Shan plucked up the courage to say angrily, looking at the wind next to her, her brows furrowed, and her heart was anxious. At this time, Feng sat cross-legged, his eyes were slightly closed, his body exuded a faint qigong, and he looked like luck healing, and the sweat on his forehead was like rolling soybeans, as if he had reached an extremely critical moment.

"Haha......" Elder Yun had no fear, shook the stainless steel broadsword, and his pace sped up a little, but he was secretly careful in his heart, he already knew Yin Shan's strength just now, if he really wanted to fight, I am afraid that it would be difficult to distinguish the winner for a while, and when the wind healed and woke up, he would have no chance of winning. What he has to do now is to end the wind with a knife, and other things can be done slowly, looking at Yin Shan's delicate little face, evil thoughts welled up in his heart, solve everything, find a good place, and have a good time. The more he thought about it, the more Elder Yun couldn't help but laugh lewdly, forcing Yin Shan back step by step, holding the stainless steel broadsword tightly in his right hand, secretly transporting energy......

The blade exuded a compelling momentum, Yin Shan was very flustered in her heart, she couldn't make a judgment at all, and even hated herself a little, just knowing how to cultivate, she couldn't even handle the duel with people (of course, this old lewd demon butterfly should be considered a beast now), I really don't know how I have cultivated for so many years. She couldn't hold back the fear in her heart where these scenes were now.

The fist light of the two fists shot out more than a foot away, and Elder Yun was startled, and his heart tightened, but he sneered. The two fists now have no attack power, just like ordinary strong winds, they look gorgeous, but in fact they don't attack at all.

"Little beauty, don't be afraid, my brother will come to hurt you later." Elder Yun Da seemed to see through Yin Shan, his face became more and more excited, at this time he did not pay any attention to the wind that was meditating, for him, the wind was a dead man. As long as he slashes down, the wind's head will fall to the ground. Yin Shan was in front of the wind, and the wind could smell the faint fragrance exuding from her, which was very fresh and comfortable......

"Who's the Yellow Sparrow?" The corners of Feng's mouth raised slightly, revealing a cold smile.

(If you like this book, don't forget to collect and recommend it, thank you!) ）

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