Live Wilderness Adventure - Chapter 682 Lost more than just freedom

Now that it was confirmed that Bi Fang was okay for the time being, the audience naturally asked the question they were most concerned about.

Why are there sandstorms in Greenland?

And is this really a dust storm?

Could it be wrong?

A series of questions flooded the live broadcast room, which is normal. In most people's impressions, there will be sandstorms, or deserts, or grasslands if they can't afford it. How can there be in Greenland.

Seeing this, Bi Fang stretched out his hand directly to the outside of the fur. After a while, he withdrew it again, so that everyone could not understand. So, when Bi Fang spread out his hand and took out the drone to turn on the night mode, everyone could see it. Clearly, it seems that not all snowflakes are in the palm.

Bi Fang rubbed it and breathed a sigh of relief. Part of the snowflake gradually melted, but in the end there was still a part of the solid body, which looked like it was still white, shining brightly in the night vision mode.

"You see, it's really sand."

"While dust is usually associated with deserts, significant dust events are also often seen at high latitudes, where winds are occasionally strong enough to blow subsurface sediments along the coast."

"Greenland can be said to be one of the places with the highest latitudes, and naturally it is no exception, so this phenomenon can often be observed here, and the dust in the wind is also mainly glacial powder, which is a kind of glacier powder. Fine-grained silt formed by grinding up rocks."

"This dust is very light, the wind can easily blow it into the air, it's most common during the transition from summer to winter, er, fall, and it's a coincidence that we're here, and everything catches up. "

Bi Fang laughed at himself.

Although the task of surviving for 100 days starts in the autumn, before it enters the eternal night, every day is a high-efficiency period for accumulating survival resources, but autumn is also a very unstable time point.

From summer to winter, this dynamic change is extremely unstable, and this instability is also the root cause of frequent sandstorms and snowstorms.

"In summer, when temperatures are high, fast-flowing streams and rivers carry meltwater away from the ice caps and into the ocean, but in the fall, cooler temperatures cause melting to slow and rivers to gradually recede, exposing large swaths of glacial silt."

"These silts are equivalent to the sand we see in the desert, providing one of the most critical conditions for the three major causes of sandstorms."

The audience was stunned.

"In simple terms, glacier powder is made by several glaciers above a valley, and winds are triggered by a combination of a low-pressure system across the Greenland ice sheet and a ridge of high pressure that follows it, flooding as stream levels drop in the fall. If the area dries up, the exposed silt will be easily swept away by the wind."

"The silt is exposed on the surface, and when there is snowfall, it will naturally prevent the wind from blowing more dust, but in summer, a large area of ​​snow is melted, and a thick enough layer of snow is not accumulated. Once there is a strong wind, the sandstorm will naturally occur. Appeared."

[It's good to put it simply! 】

[Trouble, can you tell me in words that an idiot can understand]

[I suspect Lao Fang has misunderstood the meaning of the word simple (dog head)]

In the transitional stage from thawing to freezing, autumn has become such a turbulent time.

Bi Fang was a little puzzled. He only had daylight for the first 20 days, but he spent most of the time in such bad weather. The task was more difficult than he thought.

"But you don't have to worry too much. The sandstorms in Greenland are not that severe. The main thing is to be careful about snowstorms."

"Lateral comparison of the Sahara Desert, where wind convection can throw dust high into the atmosphere, but Greenland's dust height is relatively low, no more than one to two kilometers high."

The difference in the height of the dust eventually led to the fact that the dust storm in Greenland was completely different from the massive dust cloud that existed over the Sahara for several days.

This key point makes Bi Fang less likely to be completely buried. He doesn't have to worry too much about being completely buried alive when hiding in a confined space.

The sand content is different, and the power of sandstorms is also very different. Usually, the amount of sand in the city is not that large. The main thing to be careful about is the strong wind and the respiratory diseases caused by the sand.

The Sahara Desert is scary, and changing the terrain is commonplace. Often, travelers drive over in off-road vehicles, and as a result, a sandstorm comes down and they are completely buried alive, and no one can be found at all.

"However, despite the low altitude, Greenland's advantage is that the winds are strong, occasionally strong enough to blow sediment from dry lakes, river valleys and scour plains directly to the coastline in one go."

"These dusts can run for hundreds of kilometers in a day, and may even be carried far away from the coast. The advantage is that it is possible to carry the nutrients in the dust to areas where it is not easy to obtain nutrients, which is an alternative. Redistribute."

Because no one lives, dust storms in Greenland are not only not harmful, but have considerable advantages.

At high latitudes, atmospheric dust affects the formation of ice cores, while surface dust reduces surface albedo and accelerates subsequent ice melting.

Dust can also act as ice-nucleating particles in the atmosphere, affecting cloud formation and thus the process of solar radiation.

Airborne dust transport could also provide a mechanism for transferring sediment and nutrients between disconnected sites in the dry Arctic, where hydrological connectivity is limited, and dust deposition can affect the island's Soils form, replenishing nutrients on land and in the ocean, allowing nearby creatures to live better.

It can even help scientific research. Aeolian mineral dust on ice sheets can also provide key information about climate change. By studying ice cores and dust, geologists can probe the global climate at various times.

Past ice core dust records reveal the concentration, composition, grain size and morphology of minerals during glacier formation, like the growth rings of a tree, helping to study how glaciers formed and whether there were major climatic and geological changes in between .

But for the current Bi Fang, it's really not so good.

After explaining so much, the audience finally figured out why there are sandstorms in Greenland.

"Hopefully it will end as soon as possible."

Bi Fang sighed, now he can't do anything, he can only wait quietly for the disaster to pass.

The good news is that you can look up and see the food, and there is plenty, enough to absolutely suffice before the disaster passes.

"Woooo."

Dog Dan whimpered. For it, it was not only freedom that was lost, but also the handsome horn helmet.

I don't know if I can get it back after everything is over.

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