Chapter 1607

As soon as Gao Yang's voice fell, Wang Xiao was instantly shocked.

"Prime Minister Gao, you can even predict this?"

According to the local Xiongnu captives, the most terrifying thing on Canglan Mountain was the white-haired gale. Under the howling of the gale, not only did the temperature drop rapidly, but it could also trigger major disasters such as avalanches.

Even the locals were extremely afraid.

As for the so-called altitude, there was no need to say more. The theory Gao Yang had told them earlier had basically been confirmed: the higher they went, the lower the temperature.

And this also had to be divided into daytime temperature and nighttime temperature.

If they could accurately know their location, they would have countermeasures in advance and could adjust their pace to avoid spending the night at the summit!

If Gao Yang could know these two points, it would greatly reduce the casualties of the Da Qian soldiers!

And Gao Yang had indeed said earlier that they were at an altitude of more than a thousand meters. Although it was an estimate, what kind of person was Gao Yang?

Since he dared to say this, he must have his own reliance in his heart.

Wang Xiao could not help but feel curious, "My Lord, how can this white-haired gale be predicted?"

"Will there be a white-haired gale on this Canglan Mountain later?"

Although Wang Xiao asked Gao Yang, he felt it was impossible in his heart. The Heavenly Dao was fickle; who could divine the weather?

"To be precise, this is not prediction, but calculation!"

"Calculation?"

On the side, Pu Duo and the others also returned to the camp. When they heard Gao Yang's words, they all looked at each other, full of disbelief.

This harsh weather, let alone the Da Qian soldiers, even the soldiers of Xiongnu origin were confused, but Gao Yang seemed to understand everything.

Gao Yang first glanced at the curious crowd, then said to Chen Sheng beside him.

"Go, do as I say. First go to the mountain ridge ahead, then ignite a pile of cow dung with sulfur to survey the wind speed."

"Yes!"

Chen Sheng took the order and quickly led men to go.

Not long after, Pu Duo and Wang Xiao and others saw a wisp of light blue smoke mixed with yellow rising slowly from behind the mountain ridge ahead, rushing into the sky.

They instinctively sensed that this was a method Gao Yang had come up with.

But what does this thing have to do with the white-haired gale?

Everyone looked confused.

Gao Yang looked up and breathed a sigh of relief.

"The weather is good today, just a light breeze, which is much better than I imagined."

"Let's go. While the sun is out and the temperature is good, and there is a rare light breeze on the mountain ridge ahead, we should march at the fastest speed!"

"I will tell you the principle behind this when we set up camp at night."

"But I will say one thing in advance: we can accelerate the march during the day, but once it reaches the Shen hour (3-5 PM), the entire army must stop marching and start setting up camp in place! Otherwise, once the sun sets, the temperature will drop rapidly, and I'm afraid there will be frostbite."

As soon as Gao Yang said this.

The generals also agreed one after another.

The army traveled along Canglan Mountain toward the peak.

Although it was a light breeze along the way, it could be said that they had suffered enough.

A day passed without incident, and the Jie people did not appear, as if they had completely vanished.

Shen hour.

The army began to set up camp in place.

Sure enough, as Gao Yang said, after the sun set, the temperature in Canglan Mountain dropped rapidly, making everyone feel cold.

Gao Yang naturally made preparations. The army carried pine resin balls, camel thorns, and other fuels, which were distributed according to the ratio. These were the key to keeping warm.

But what shocked Pu Duo and the others the most was.

Gao Yang's prediction for the day was simply divine. He said it was a light breeze, and it was a light breeze; he said the wind would increase, and it increased, almost achieving a perfect prediction.

If Wang Xiao didn't know Gao Yang's background, he would have thought Gao Yang was not a human, but a god.

What kind of terrifying ability was this?

Night fell.

Inside the tent.

Outside was the howling cold wind.

Gao Yang's tent had a hint of warmth. The pine resin balls burned slowly, and the firelight reflected Gao Yang's face, which looked unfathomable.

At this time, it was getting late.

After Wang Xiao, Pu Duo, Li Erji, and others finished eating, they all came to Gao Yang's tent.

"Prime Minister Gao, damn it, it's too cold outside. I went to take a piss and almost froze my treasure," Li Erji cursed.

Gao Yang glanced at him and took a sip of hot tea to warm up.

Pu Duo asked curiously, "My Lord, why can you even calculate the wind speed?"

"Is this really not a coincidence?"

As soon as Pu Duo said this.

Everyone looked at Gao Yang, clearly curious about Gao Yang's words during the day.

Based on the wind speed, the army adjusted in time, which also made the march much faster.

Gao Yang looked at the crowd, knowing that this was their first time climbing a plateau, and they were a bit unsure, so he comforted them.

"This is not a magical method. It's fine to tell you about it."

"Did you see the light blue smoke column mixed with yellow during the day?" Gao Yang asked, looking at the crowd.

Everyone nodded one after another.

Gao Yang stretched out his hand to warm himself by the fire and said, "That is sulfur, ignited by a pile of cow dung. Once sulfur is ignited, its smoke goes horizontally upward. As for why it tilts, this involves horizontal wind speed!"

"Based on this principle, we can roughly estimate the wind speed."

Everyone was stunned and fell into deep thought.

"So that's it."

"In other words, this sulfur smoke is blown by the horizontal wind, thus producing an inclination?"

"Not bad, according to the Prime Minister's words, it should be so."

Li Erji listened, completely confused.

His mind was full of: Who am I, where am I, what am I going to do?

So that's it?

He was still completely confused.

But his inner face prevented him from asking further.

Gao Yang continued, "The principle is not difficult to understand. The greater the horizontal wind speed, the greater the angle between the smoke column and the vertical direction."

"This requires the use of trigonometric functions, which is the size of this tanQ value. The rising speed of sulfur smoke is about 1.8 to 2.3 meters per second. I take the average value of two meters per second."

"In other words, this horizontal wind speed is 2 multiplied by tanQ." Gao Yang put down the teacup in his hand, picked up a branch, and wrote and drew on the ground, marking an angle, "You don't understand the size of this angle, and it's complicated to explain, so I'll just say it directly."

"tan30 is about 0.57, 75 degrees is 3.7, and then multiply by the sulfur rising speed of two meters per second. Once it deviates by 75 degrees, it is a white-haired gale. The wind speed will be terrifying, and the temperature will drop rapidly. It is considered extremely harsh weather at high altitudes!"

"I said it like this, can you understand?"

Gao Yang explained it simply and looked at the crowd.

I saw Pu Duo and others looking confused, all opening their mouths, staring at Gao Yang in astonishment.