Terrifying foreboding of strange clouds

Behind the bizarre beauty of clouds of dragon scales, nacre clouds, tsunami clouds . are worrisome for people about the changing weather and climate.

1. Lens cloud

Lenticular Clouds are very rare, often appearing along the high mountains and the windy side of the mountains, especially when a stable stream of dry and moist air passes through the mountains or hills. When the moist air layer is pushed up and reaches a saturation point, it condenses into clouds.

The lens cloud has a fluffy, layered shape, looking far away like flying saucers. Therefore, many people often confuse them with unidentified flying objects and call them "UFO clouds".

However, few people know that the appearance of these clouds is a precursor to changes in weather such as storms and floods. They usually last for about 10-15 minutes before the weather changes. At this time, the sky may appear ripples in both vertical and horizontal directions, depending on the height of the clouds.

2. Cloud scales dragon

Mammatus clouds or "dragon scales clouds" is a meteorological term referring to strange spherical clouds in the world. These clouds are bumpy created by many small cloudy clouds, forming a large, suspended, dense cloud, stretching hundreds of meters in the sky.

These clouds are stacked on top of each other, making them look like bouncing biceps of giants. According to astronomers, Mammatus clouds are a sign of a major thunderstorm, accompanied by thunderstorms in hot, warm months.

Huge clouds are the image of a large amount of steam in the condensed air . Due to the movement of the air layer at Mammatus clouds is extremely complicated and intense, airlines recommend that aircraft should not operate in this cloudy weather area.

3. Cloudy wavy Undulatus Asperatus

The image of the following clouds is temporarily named by Gavin Pretor Pinney - founder of the Cloud Association, Undulatus Asperatus . Understandably, it was rippling clouds in a chaotic, powerful and unusual way.

Listening to the word "ripples" seems normal but in fact this is a rare form of clouds . Researchers are still investigating whether this cloud is a new form.

But experts suspect that the messy lower surface of the Asperatus cloud may be due to strong winds that stir the previous cold and hot gas layers. This makes clouds ripple in an irregular, chaotic way.

Meanwhile, expert Pretor Pinney added: "Looking closely at these clouds can help us detect signs of global warming in the sky. They will open up solutions to temperature and Climate change in the coming time of the Earth ".

4. Nacreous clouds

Nacreous Clouds is a form of cloud formed in extremely cold areas of the low stratosphere, at an altitude of 15,000 - 25,000m. As described, nacre clouds look like thin films, curled up and flung, spread all over, suddenly shrinking in the sky, glowing and dark.

Under extremely low temperatures (-78 degrees Celsius), clouds of different types are formed, categorized according to their physical state and chemical composition. The curvature of the Earth's surface will help clouds receive light from the horizon and reflect on the ground, creating a phenomenon of nacre clouds.

This phenomenon is believed to be a direct consequence of the fact that humans emit too much methane gas, react with ozone, form chlorine clouds. The appearance of nacre cloud is a worrying sign showing that the phenomenon of Earth is getting warmer.

5. Cloud tsunami Kelvin-Helmholtz

People call these clouds in the scientific name "Kelvin-Helmholtz cloud". This is the name given to two scientists Lord Kelvin and Hermann von Helmholtz (German) when they study, giving the most accurate explanation for this strange natural phenomenon.

Many people doubt that 'Does the phenomenon of tsunami in the sky mean a catastrophe?' However, scientists point out that the cloud wave of clouds or the Kelvin-Helmholtz wave formed when two air layers collided, causing the wind to suddenly change speed, creating chaos. The evaporation and condensation of water vapor from the sea when meeting the intersection of two air layers with different thickness and light will create wave effect for the clouds.

The phenomenon of " tsunami clouds " often appeared before the storm hit. Large clouds usually last several kilometers to fill the sky. Following the " tsunami clouds " are heavy rain, strong wind, floods and hail .

6. Luminous clouds

Noctilucent Clouds is a rare phenomenon, occurring in the upper part of the Earth's atmosphere . It is made up of ice crystals and can only be seen when illuminated by sunlight from below the horizon. In Latin, noctilucent means to shine in the night .

Noctilucent clouds are one of the highest types of clouds in the Earth's atmosphere, located in the middle layer at altitudes from about 76 to 85 km, even 100 km. They usually occur in high latitudes during the summer months and are thought to be an omen associated with climate change in the lower atmosphere.

7. Cloud hole

The cloud hole (Fallstreak Hole) is a large circular space appearing in the cloud of monuments (thin band clouds, tufts, beams) or medium clouds (cloud-shaped sphere). These holes formed when the water temperature in the cloud was lower than the freezing point but the water was still not frozen due to the lack of ice seeds .

When a part of the cloud begins to freeze, it will cause a chain effect, causing the steam around it to freeze and fall. This phenomenon causes a hole, usually circular, in the middle of the cloud.

One assumption is that turbulence in the cloud layer (due to aircraft) can trigger chain evaporation effects and create cloud holes. Experts said that the phenomenon of cloud holes may be an omen of global climate change , enhancing the possibility of snow falling in areas with cloud errors. However, some scientists still have doubts about this issue.