Natural phenomena that often appear in summer

Natural phenomena that often appear in summer

What are the natural phenomena that often appear in summer? As we all know, summer is a very hot season. Besides giving us this feeling of weather, there are many interesting natural phenomena. Such as cicadas, bright clouds at night and so on. What other natural phenomena often appear in summer? Let's have a look!

Natural phenomena that often appear in summer 1

Common natural phenomena in summer include cicada singing, frequent occurrence of thunder showers, increased precipitation, lotus flowers in full bloom, frog chirping, rainbow, prolonged sunshine time, obvious temperature rise, the sun never sets in the Arctic Circle for 24 hours, turtles crawling along the coast to lay eggs, fireflies appearing at night, noctilucent clouds and so on.

Cicada is an insect that only exists in hot summer. Cicadas usually lay eggs in woody tissues. When the eggs hatch into cicada nymphs, the nymphs will immediately burrow into the ground and sleep for a long time. During this period, it will undergo about five molts before it can grow into an adult, and this process often takes at least two to three years. When the cicada grows into an adult, it will climb out of the ground in summer, live in a tree and keep singing all summer.

The natural phenomenon of noctilucent clouds usually appears in high latitudes in summer, so it also has the scientific name of "polar mesospheric clouds". Noctilucent clouds generally have a beautiful luster of light blue or silver gray, which often appears in the early morning or evening in summer. Scientists have not yet come to a conclusion about its formation.

The natural phenomena that often appear in summer are 2 1 and bright clouds at night.

Seen from space, the more accurate name of this cloud should be Polar Mesosphere Cloud (PMCs). Scientists found the first image example from the data measured by the intermediate water-ice physical satellite (AIM). This kind of mesospheric cloud usually appears in summer in polar regions, but its frequency in low latitudes is increasing.

2, cicada singing

Cicada uses membrane vibration to make sound. The structure of the sound generator is divided into two chambers. The big room has pleated membrane and mirror membrane, and the small room has tympanic membrane. When the muscles in the inner wall of insects contract, the tympanic membrane vibrates to make a sound, which is particularly loud with the help of the mirror membrane and the echo of the singing room.

Frogs croak

There is a bulging thing on the frog's mouth that can make a sound. It likes to sing loudly on rainy days in summer. In hot summer, frogs usually hide in the grass and occasionally make short calls. If there is a cry, the people next to them will scream a few times, as if singing to each other. Frogs are happiest after the heavy rain.

4. Rainbow

Rainbow, also known as Tiangong (Hakka), crosses the rainbow, blushes, etc. , is an optical phenomenon in meteorology. When the sun shines on the water droplets in the air, the light is refracted and reflected, forming an arched color spectrum in the sky.

5. Thunderstorm

Thunderstorm is a shower phenomenon accompanied by lightning. Produced under thunderstorm cumulonimbus clouds. It is characterized by large-scale cloud movement, which is much more violent than showers and accompanied by discharge, and is common in summer.

Natural phenomena that often appear in summer 3

The warmer the temperature, the more frequent the heat wave: when the earth rotates, it has an inclination angle of nearly 23.5 degrees with the sun, which is what we call the axis inclination angle. Due to the inclination of the earth's axis, the sunshine intensity in the northern and southern hemispheres will change with the seasons of the year. In summer, the sun shines at a very large angle, so any point on the earth will get more energy, leading to an increase in temperature. When a high-voltage system is formed in an area, more heat waves will be generated. With the continuous warming of the climate, scientists predict that there will be more frequent and violent heat waves in summer. (Passenger/Compiler)

In the Arctic Circle or above 66 degrees north latitude, the sun can be seen within 24 hours without setting. How long it lasts depends on your latitude. In the Arctic, this phenomenon will last from March 2 1 to September 23. This is what we usually call extreme day, and it is also caused by the inclination of the earth axis. At the equator, you can see the sun rising in the east and then disappearing on the horizon, but at the North Pole, you can see the sun making a 360-degree cycle at an oblique angle. Even if it falls below the horizon, it will appear soon.

Thunderstorms are more frequent: According to the data of the US Atmospheric and Oceanic Administration, thunderstorms will be more frequent in summer. This is because humidity and rapidly rising warm air flow play an important role in the formation of thunderstorms. As the moisture rises, they will condense at high altitude to form water droplets. With the continuous occurrence of evaporation and condensation, air flow will lead to the collision of droplets and charge separation. Electrons will gather in the low clouds, and the rising water vapor will bring positive charges to the clouds at the top. When the positive and negative charges gather to a certain amount and form a conductive path, lightning will occur.

Fire rainbow cloud: Fire rainbow cloud is very unique. They have bright rainbow colors and flame-like shapes, so they are easy to identify. This phenomenon usually occurs at a certain latitude in summer, because the formation of this phenomenon requires the sun to be in the right position (58 degrees above sea level). Of course, the position of the observer is also very important, which is why it can't be observed at 55 degrees north latitude or south latitude.

Fireflies: A large number of fireflies gather for several weeks every year, and you can see their perfect performance at dusk. Fireflies belong to the beetle, and the light they emit is a display of courtship, which allows females and males to recognize each other, and this pattern is different in each firefly species. Their light is a bioluminescence phenomenon.

After hatching, the baby turtles return to the sea: in summer, the pregnant turtles climb the sand beach and dig a cave, where they lay as many as 100 eggs. These turtle eggs buried in warm sand will hatch in about 60 days (the incubation time of different turtle species will be different), and they will stay there for the next few days to absorb energy from the yolk. Then they will rush to the sea in large numbers to avoid predators on the beach.