In the endless flat snowfield, a pile of dry snow was suddenly thrown into the air, and finally fell on the ground.
Having never been to the north in winter, it is difficult to understand what dry snow is.
I grabbed a handful of snow and squeezed it hard. It couldn't be kneaded into a ball at all. It was like dry flour. The snowflakes fell in a flurry, and some white dust floated up.
The drone took off and when I looked down, I discovered that someone had dug out a shallow strip of ice on the flat ice sheet at some point. Bifang was squatting inside, shoveling broken ice.
He tied two knives together at an angle of 90 degrees to form a standing shovel. Another knife was placed in the middle to prevent the two from coming together. He also wrapped the third knife's blade with rope to serve as a shovel.
Grip.
This is much more convenient than using a knife to chisel.
This is a snow trench, its main purpose is to protect against cold wind.
We are still on the road now, and the demand for shelter does not need to be too high, as that will only cause a waste of cost.
Bi Fangzuo rested inside for a while and continued: "It's easy to understand that there is a lot of snowfall. The extremely high frequency of snowfall leads to a large amount of snow on the land. The snow here will not melt, so it will exist until
It won’t disappear until next spring.”
"Snow cannot be retained on the sea surface. Snowflakes drift into the sea and will dissolve quickly. As the sea ice gradually expands, the snow on the new sea ice must be thinner than that on the old ice."
"This is a way to judge whether your progress is correct, but it is not easy to use in other places. First of all, it has to be in a cold zone, then offshore, seasonal land such as ice sheets will form, and finally it snows frequently.
It’s a method that is tailored to local conditions.”
[There is no other place besides Greenland where it can be used (face covering)]
[If you learn nothing, you will learn nothing]
[What if you don’t know where you are?]
[Catch alive an honest man who really wants to learn his skills!]
[Lao Fang actually taught me before that a sun, a piece of paper, a pen, a miracle]
[I’ll calculate the longitude and latitude for you, buddy, have you ever seen how to calculate inverse trigonometric functions with pen?]
Many new viewers who have never watched the old video were shocked. They can still calculate inverse trigonometric functions without a calculator!?
Every video has old viewers, and it is inevitable that new viewers will come in, but it doesn't matter, there will always be enthusiastic fans to help popularize science.
The importance of class representatives is highlighted.
At present, Bi Fang's live broadcast room has many professional course representatives who are quite famous. As long as water friends ask, they can even give precise answers as to which episode and minutes they are.
[Can inverse trigonometric functions be calculated in writing? 】
[Theoretically, all mathematical formulas can be calculated in writing...]
[Actually, I want to say that people who understand will naturally understand, and people who don’t understand will not understand at all]
[Let me understand, before becoming an adventurer, Fang Shen was also a brilliant mathematician, geographer, biologist, meteorologist, physicist, chemist, historian, naturalist, etc., etc.
Are two brushes coming to the Arctic to feed the polar bears?】
[Polar Bear (pushed away in disgust): This meat is too lean, we won’t eat it]
【The words are very smooth】
【I am fat enough, will it eat me?】
There is no need to build too big a trench in the snow. Bifang stopped working after the depth reached more than 60 centimeters. The snow was thick for 30 centimeters, and the remaining 30 were on the ice. Bifang's hands were sore from digging.
It's also dark.
He didn't even know how thick the ice was, but he conservatively estimated it in meters. It was simply impossible to dig a hole for fishing. The deeper the ice, the harder it was. He would have to go hungry today.
In less than seven hours, it got dark in about six hours. Everyone was really shocked. They had never seen such a short day. It seemed that they had done nothing and were about to fall asleep.
Bi Fang walked out of the pit and piled the snow he had just excavated on both sides of the trench, making it high.
He also compacted the nearby snow hard, but since it was dry snow, it was impossible to make snow bricks.
Bi Fang took out all his ropes, pulled them left and right like weaving, and then dripped warm water on the folded points on both sides. The liquid quickly condensed into ice at low temperatures, freezing the ropes firmly.
"If there are no branches or other items to use as a roof, we can use ropes, leaving two three-centimeter gaps between each one, which is enough."
After everything was pulled out, a relatively sparse net appeared in front of them, leaving only space for one person to enter at the end.
Bi Fang piled all the snow on the net to form an airtight roof.
Entering through the gap, Bifang breathed in the hot air and blocked the cold wind. He felt that his body quickly warmed up.
"Both igloos and igloos can trap heat, but unlike a house, it changes minus 40 degrees to minus 10 or 5 degrees. At this temperature, the ice and snow will not melt, but we can clearly feel the warmth.
."
"Five degrees below zero is not considered cold at all. It is a normal temperature for human activities."
Bi Fang huddled in the corner, chatting with the audience. It was too early for bedtime, so he told the previous Viking story again.
The audience is also very curious, what is the ending of Vikings?
"The Vikings stayed in Greenland for a long time, from the 10th century to the 14th century. During that time, Greenland's climate was relatively mild, allowing for planting and grazing, and the settled Vikings could rely on reserves to survive the winter."
"Later, the climate changed, production could not be maintained, and the Vikings could not make a living like the Inuit, so they could not survive."
"It happened to be the Little Ice Age at that time, and the route from Iceland to Greenland was blocked by ice floes. Greenland had no wood that could be used to build ships, so even if the sea route was open, I probably wouldn't be able to travel there."
"A wedding was held in Hvalsey Church in 1408. This is the last record about the Norsemen in Greenland. Since then, the exchanges between Greenland and Europe have been interrupted, and no news has come. It can be regarded as the Vikings in Greenland
'Extinction' on."
"It can be said that this is a joke played by nature on Eric the Red. He just happened to come to Greenland on the most beautiful date."
"When the Vikings first arrived in Greenland, it was during the brief Medieval Warm Period. It can be said that they were deceived by nature."
"Since ancient times, Greenland, like other polar regions, has experienced multiple climate changes, which has affected the growth of local animals and plants, and the survival of the indigenous people. During this period, in addition to the Vikings, there were also Inuit people who settled in Greenland.
"The former became extinct, and the latter successfully overcame the challenges of the Little Ice Age."
There is an endless stream of people who have come to Greenland, but the only ones who have really survived for a long time are the Vikings and the Inuit.
After the Ice Age came, the Vikings announced their defeat, but the Inuit continued to prosper.
This is a race in the ice and snow.
Bi Fang used the example of the Vikings to warn himself of the cruelty of nature, but he wanted to pick up the experience of the Inuit to arm himself.
"The lessons of the former are what we need to avoid, but the latter is the key to whether I can succeed in this challenge."
－－－－－－Digression－－－－－
The hottest place in the world is not the African desert, but Death Valley in California, United States.
On July 10, 1913, the desert valley of Death Valley reached 56.7 degrees, which is the current Guinness World Record holder.