Feeling the rising temperature, Bi Fang felt that all the cells in his body were relaxing.
There are white undulations in the distance, which means that you are heading in the right direction, heading towards the interior of Greenland.
Because there cannot be undulations on the ice sheet, it must be a mountain range.
"If you choose a goal as the direction of travel, after reaching that goal, you must re-establish a new goal."
"The polar environment is very empty, with almost no characteristic objects. Remember that you can see a certain feature on the horizontal plane, but it does not mean that you can reach that place quickly."
The old adage warns you of this.
You see the mountain, but even if your horse runs to death, you may not be able to reach it.
"It may be as far away as 100 kilometers away. The captain of the cruise ship shared with me an experience of his. Once he was walking on the ice sheet of Greenland and saw a black object at the horizontal line of sight. For several weeks,
During their trip, they passed icebergs and coastlines without seeing anything. That was the first time they saw a small black dot."
"The captain at the time was extremely excited about this different object he saw. He set up camp and talked eagerly about the mountainous area that he would reach tomorrow morning. As a result, after two days of walking, it was still there!"
【Please don’t talk about this embarrassing thing, okay?】
【Ah, it’s the captain!】
[Is the captain also watching the live broadcast? 】
[Aren’t you afraid of hitting an iceberg if you don’t stare at the ship?]
[Dear, I have a first mate and a second mate, those are the ones who really do the work]
【Good guy】
【Polite Mate】
Bi Fang drank the last sip of water, squatted down and started chipping away at the ice.
"I drank a total of four bottles of water these days, about two bottles a day, and I didn't drink too much. Drinking water is a part of metabolism and will take away your body's energy, so under not extreme circumstances, just keep
Just the necessary moisture is enough.”
"One of the things I feel is very obvious, that is, the saltiness in the water is getting less and less obvious, and here..."
Bi Fang chiseled off a piece of ice, held it in his mouth, spit it out, and said with a smile: "There is almost no salty taste anymore, which means the ice here is quite old."
The audience was a little surprised, why?
[I always thought ice was fresh water, why is there salty ice? 】
[Indeed, I only remember learning before that the icebergs in the North and South Poles are all fresh water, and there are a lot of them]
The glaciers of Antarctica and the Arctic are the world's largest freshwater resources, with 70% of the world's freshwater stored there.
This is probably everyone’s impression. Is fresh water salty?
"You don't understand the real reason why glaciers are fresh water. The icebergs in the North and South Poles are indeed fresh water, but the reasons for their formation are different, which also leads to some other differences."
"The Antarctic region is a continent. The specific heat capacity of land is much smaller than that of water, and its ability to store heat is weak. The heat gained in summer is quickly radiated away."
Bi Fang poured crushed ice into the pot and explained.
"The average annual temperature there is about -56°C. At low temperatures, the water produced through the water cycle mainly exists in the form of rain or snow, and the freezing point of water is 0°C. At low temperatures, the snow can be guaranteed to remain unchanged all year round."
"Even in summer, part of the snow melts and is quickly frozen into ice. Therefore, a large number of ice blocks float on the ocean around the Antarctic continent, forming huge icebergs."
This audience is easy to understand.
The fresh water in Antarctica naturally evaporates and turns into snow, and then dissolves into ice. The entire process does not come into contact with any salt, and naturally becomes fresh water icebergs.
"In comparison, the Arctic region has a small land area, most of which is the Arctic Ocean. Due to the large heat capacity of seawater, it can absorb more heat and dissipate heat slowly, so the average annual temperature there is higher than that of the Antarctic. In addition,
Warm current, around 8℃.”
"The freezing point of seawater drops due to various salts. At the same time, the solubility of seawater at low temperatures will also decrease. Seawater at high temperatures has a higher salt content. When seawater refreezes, the salt will be transferred to seawater at a relatively high temperature.
Therefore, the frozen seawater becomes 'fresh water', and the salt will precipitate in the form of crystals, causing the salt content in the formed glacier to decrease."
"Therefore, there are fewer glaciers in the Arctic than in the Antarctic, and most of them are accumulated in Greenland."
"The former is naturally distilled directly into fresh water, a direct qualitative change, but the latter is the precipitation of salt due to various reasons. It is a qualitative change caused by a quantitative change. Since it is a quantitative change, there will naturally be a process. When we walked here from the sea, we experienced
This process of quantitative change.”
"The Eskimos living in the Arctic ice sheets rely on this method to obtain a certain amount of fresh water resources, which also leads to a higher salt content in frozen seas or oceans near sea ice.
"At my feet, the qualitative change has been completely completed. The salt has completely separated out and turned into real fresh water. What I drank before can be regarded as salt water with some salt added. Although it is salt water, the salinity is much lower than that of sea water. It is completely OK.
Used to replenish moisture.”
【The strange thing is that it has only increased.】
[I feel like I learned something amazing again]
【Geography is amazing】
"Actually, a very interesting phenomenon occurs when sea water freezes, and that is death icicles."
"The temperatures at the North and South Poles are very low. Sometimes the sea surface temperature will drop to as low as tens of degrees below zero. At this time, the sea surface will begin to freeze. As the sea surface temperature decreases, the salt will be precipitated and the density of the sea water below will increase, causing
An icicle continues to extend downward, and when the surrounding seawater reaches the freezing point, it will not freeze due to the change in density."
"Thus, the 'icicle of death' was born. You can see from below that an icicle extends from the sea surface to below. When the temperature is extremely low, the freezing occurs in a very short time. When the icicle touches it,
The marine life that arrives will be frozen in an instant, so this phenomenon is called the 'death icicle'."
【What magic?】
【Fang Shen, I want to learn this!】
[Fang Shen: If I knew this, I would have gone to travel the fucking universe long ago]
"Now we are walking on the Greenland ice sheet. The thickness of the ice sheet can even reach several thousand meters. It is impossible for manpower to penetrate it. The known average thickness is more than two thousand meters, and the thickest place is even more than three thousand four thousand meters.
100 meters.”
Shocking data popped out of Bi Fang's mouth one after another, shocking the audience.
Who has seen the ice layer several thousand meters away?
Amid such shock, Bi Fang never reached the mountains in front of him, so he had no choice but to dig a snow ditch to survive the whole night.
It wasn't until the evening of the third day that Bi Fang actually touched the first rock he came to the island.