Live Wilderness Adventure

Chapter 685 Lost Not Only Freedom

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

Why are there sandstorms in Greenland?

And is this really a sandstorm?

Could it be that I read it wrong?

A series of questions flooded the live broadcast room, which is normal. In the impression of most people, there will be sandstorms, either in deserts, or grasslands. How can there be places in Greenland.

Seeing this, Bi Fang directly stretched out his hand to the outside of the fur, and then retracted it after a while, making everyone unclear. So, after Bi Fang spread his hand, took out the drone and turned on the night mode, everyone saw Clearly, it doesn't seem to be all snowflakes in the palm.

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

"See, it's indeed sand."

"While dust is typically associated with deserts, significant dust events are also frequently present 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 latitude, and it is no exception, so this phenomenon can often be observed here, and the dust in the wind is mainly glacier powder, which is a kind of glacier powder. Fine-grained silt formed by grinding up rock."

"The dust is so light that the wind can easily blow it into the air, and it's most common during the transition from summer to winter, um, fall, which is a really unlucky time for us to catch up with everything. "

Bi Fang laughed at himself.

Although the task of surviving for 100 days begins in autumn, and before entering the eternal night, every day is a highly efficient 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.

"Summer temperatures are high, and fast-flowing streams and rivers carry meltwater away from the ice sheet and into the ocean, but once in autumn, cooler temperatures cause the melt to slow down and the rivers recede, exposing large swathes of glacial silt."

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

The audience suddenly realized.

"In simple terms, glacier flour is made by several glaciers above the valley, and the wind is triggered by a combination of a low-pressure system across the Greenland ice sheet followed by a high-pressure ridge that floods as stream levels drop in autumn. If the area dries up, the exposed silt will be easily washed away by the wind."

"The silt is exposed on the surface. When there is snowfall, it will naturally prevent the wind from blowing up more dust. However, in summer, a large amount of snow has melted, and the snow layer has not accumulated enough. Once there is a strong wind, the sandstorm will naturally come. Appeared."

[Well, to put it simply! 】

【Could you please explain it in words that idiots can understand】

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

In the transitional phase from thawing to freezing, autumn is 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 even more difficult than he imagined.

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

"Compared horizontally to the Sahara Desert, where the wind convection can throw dust high into the atmosphere, but the dust height in Greenland is relatively low, with a height of no more than one to two kilometers."

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

This crucial point makes it less likely that Bi Fang will be completely buried. Hiding in a confined space, you don't have to worry too much about being completely buried alive.

The power of sandstorms is also very different with different sand concentrations. Usually, the amount of sand in cities is not that large. The main thing to watch out for is strong winds and respiratory diseases caused by sand.

The Sahara Desert is scary. Changing the terrain is commonplace. Travelers often drive off-road vehicles to go there. As a result, a sandstorm comes down and they are completely buried alive. No one can be found at all.

"However, although the height is not high, Greenland's advantage is that the wind is very strong, and occasionally it can be strong enough to blow sediment from dry lakes, river valleys and scour plains directly to the coastline in one go."

"The dust can travel hundreds of kilometers in one day, and may even be taken far away from the coast. The advantage is that it is possible to bring the nutrients in the dust to areas where nutrients are not easy to obtain. It is an alternative Redistribute."

Because there are few people living, the sandstorms in Greenland will not only do no harm, but have quite a lot of benefits.

At high latitudes, atmospheric dust affects ice core formation, while surface dust reduces surface albedo and accelerates subsequent ice melt.

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 soil formation, replenishing land and sea Nutrients, so that nearby organisms live better.

It can even help scientific research. The eolian mineral dust on the ice sheet can also provide key information about climate change. Geologists can study the global climate over time by studying ice cores and dust.

Past ice core dust records reveal the concentration, composition, particle size and shape of minerals during the formation of glaciers, just like the annual rings of a big tree, helping to study the formation process of glaciers and whether there are major climate and geological changes in the process .

It's just that 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. They not only lamented the wonders of nature, but also made all kinds of bad things happen.

"Hopefully it ends as soon as possible."

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

The good news is that there is food to be seen looking up, and it is plentiful, enough to be absolutely enough until the disaster is over.

"Woo hoo."

Goudan whimpered. For it, what it lost was not only freedom, but also the handsome horned helmet.

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