Rain is a natural phenomenon, so how does it come about?

Anyone who has been in junior high school knows that the water on the surface of the land and the sea evaporates into water vapor, and the water vapor rises to a certain height and becomes small water droplets when it is cold, and these small water droplets form clouds, which collide with each other in the clouds and merge into large water droplets, and when it is so large that the air cannot hold it, it falls from the clouds and forms rain.

In fact, what many people forget after learning is that when the water vapor rises upward, it is very subtle, and in the process of rising to the sky, it will gradually gather with each other, and then rise to a certain height, and the air temperature will decrease, and these water vapor will liquefy into small water droplets and condense into ice crystals when it is cold, and the small water droplets at this time are only about 0.01 millimeters.

When small water droplets gather and become clouds, rain is formed when the gravitational force is greater than the buoyancy of the air.

It's simple, but the process is complex, and there are many influencing factors.

Dai Daojin turned out the scientific knowledge he had learned from his mind, but he was interested in it, saying that a butterfly in South America flashed its wings a few times, which can cause a tornado in Texas, USA, so it should not be difficult to trigger the weather in Nanjing City, which is only about ten miles away.

A test in Wanguizang just now changed the environment of Nanjing, including temperature, humidity and wind intensity, causing the overall change of this small area system in Nanjing, causing the rainfall just now.

With his current sensitivity to the nature of heaven and earth, Dai Daojin can be sure that there was no rain in Nanjing today.

At this time, he looked at the city of Nanjing again, and at this time, the black clouds had dispersed, and the rain had stopped.

Dai Daojin pondered, then his eyes closed slightly, his mind was silent nebula, and his spiritual power flowed out, spreading to the void, this time the focus of his spiritual power spread was no longer large, and he no longer paid attention to the underground, but went up infinitely, straight to the sky.

The spiritual power is like a wisp, and with the blessing of the nebula, the whole body and mind retreat into the state of the unity of heaven and earth, and at this moment it seems to be in harmony with heaven and earth, melting into the void, and the spiritual power seems to be infinitely high.

Of course, this is just Dai Daojin's feeling, and at this moment, his spiritual power is vaguely perceiving the position, about five or six thousand meters.

The clouds are probably at this location, and there are also higher altostratus, but Dai Daojin doesn't need them for the time being.

When he opened his eyes, he was calm and deep, the water in his body flowed vigorously, and the surrounding water energy changed, all of which turned into water vapor according to his mind, and then the wind in the mountains and forests dragged these water vapors and began to slowly rise.

In this void densely covered with Dai Daojin's spiritual power, everything, every trace of air flow was reflected in his mind, and in his subtle perception, a large area of water vapor began to rise, slowly getting higher and higher.

"Ding" sounded silently.

Grain by grain of water vapor began to collide, and this scene continued to occur as it rose.

When this piece of water vapor came to about 1,500 meters, Dai Daojin's heart moved slightly, and he began to drive a cold wind to blow from north to south.

Under the rolling airflow, the water vapor began to drift diagonally towards Nanjing City, and at this time, Dai Daojin stopped other movements and just stared at this water vapor.

As the water vapor slowly progresses, it begins to rise, reaching 1,800, and the temperature decreases, and it begins to liquefy or condense, forming clouds.

This city, which is next to the Qinhuai River, has plenty of water and enough cumulus clouds in the sky.

In the city, Li Laohan had just put away the vegetable stall and set it up again, and while bowing his head to tidy up, he complained in his heart that it was raining.

"Smack"

Li Laohan touched the water droplets on his face, looked up, his old eyes glared, saw the clouds that were slowly darkening, took a sip, and scolded and began to put back the things he had just taken out.

Just as he was packing up, a torrential rain suddenly fell.

Pedestrians on the road, hurriedly dodging, and there was another rush.

The rain came and went quickly, and it stopped after just tea time.

On the top of the mountain ten miles away, Dai Daojin looked at Nanjing City, looked up at the sky again, frowned and pondered for a while, and suddenly galloped in the direction of Nanjing City, and after walking a long way for five miles, he suddenly stopped.

The mind is silent, repeating the action just now, driving the surrounding water energy to vaporize and rise into the sky.

After a while, after observing the effect, he walked some distance further and repeated again.

Immediately afterwards, he moved some distance away, even more than ten miles, or approached, even into the city.

And just like that, he went back and forth.

And in the city of Nanjing, most of the people in the entire city have looked up at the sky a few times today.

It's really today's weather, and it's very strange.

Sometimes it's sunny and sometimes it's rainy, and when it's sunny, it's cloudy, and when it's raining, it's thundershowers, it's drizzling, it's raining.

Later, the vendors who set up stalls outside set up sheds with sheds, and those who did not simply put away their stalls.

The next few days were rainy and endless.

The people of the whole city began to feel gradually depressed, and the reports received by the yamen tightened, and there were more fights and brawls, and as the rainy days increased, the traffic was difficult, and the production and sale of seasonal vegetables were affected, and the prices began to rise.

The heavy rain that did not stop at all stopped the people in the city from going out, and the turnover of many shops in the city began to decline.

The water level of the Qinhuai River is rising silently, and it is slowly beginning to approach the warning level.

The original river of flowing gold, countless flower boats on the river, seemed to be affected by this dull rainy day, and there was no movement, and the warblers and warblers in the boat no longer had laughter and laughter, as if they were wilting, and the dignitaries and dignitaries in the city were inhibited by the rain to suppress the secretion of hormones, and they lost their interest in looking for flowers and willows.

......

Twenty miles away from the city, Dai Daojin was dressed in gray clothes, standing there with his hands in his hands, his expression seemed to be full of fatigue, but his eyes were very bright.

Looking down at the dust on his body, Dai Daojin opened his mouth and exhaled a breath *** God driven.

This air flow swirls up, this breath contains the water strength he spit out, with his wind energy essence, containing this spirituality, as it rises, it will close when it meets the wind, and it will rise when it sees the wind, and after a few breaths, there is a faint whistling sound in the sky thousands of meters above the head.

The wind arrives, the clouds gather, the thunder arrives, and the rain falls.

"Da Da ......"

The rain came in a hurry.

Dai Daojin stood still, and only after washing off his dust did he move forward, and as he walked, the water vapor of the wet clothes on his body evaporated and became dry.

His steps were not fast, and after a quarter of an hour, he entered the city of Nanjing.

At this moment, it rained for seven days in Nanjing, and finally cleared.

Dai Daojin walked on the street, looking at the people on the street who were showing happy and happy emotions, his eyes flashed slightly, referring to the negative emotions of these people who were suppressed and irritable when he just entered the city, in contrast, he thought more in his heart.

Originally, I thought that I was just using the eight powers of the "Heaven and Earth Yin and Yang Six Voids and Self-only Natural Fundamental Laws" to create this kind of small means similar to spells, and I also gave this trick the name of "Rain God Mantra" according to the previous "Wind God Mantra", but looking at the mental state of the people in this city, he thought a lot.

Just seven days of rain can change the price of goods in a city and affect people's livelihood, and if people's mood continues, it is unknown whether it will be riots.

The collapse of a complete society]] system may only require the pry of one link.

ecosystems, even more so.

When Dai Daojin walked to the underground mansion, he thought: Under the cover of Lao Dai's spiritual power, he blew a breath here, thousands of miles away, there was a violent storm, and the sky collapsed and the earth cracked. But the premise is to develop the "Heaven and Earth Yin and Yang Six Voids Self-Seeking Natural Fundamental Law" to the extreme, and to use the eight forces between heaven and earth to the extreme.