In so many countries around the world, in the roughly 60 million years since the formation of the Mariana Trench, only detectors from the United States, Britain, the Soviet Union, China, and Japan have had the privilege of penetrating deep into the Mariana Trench. The trench is more than 11 kilometers deep at its deepest point, and according to the data transmitted by the probe, the trench is still deepening. What is even more bizarre is that this trench has been swallowing seawater since it was formed, and even the annual amount of water swallowed is 3 billion tons, and every 1 million years is 300 trillion tons of seawater. So the question is, why hasn't the sea level dropped when so much seawater has been swallowed up?
Discover the Mariana Trench
In fact, according to relevant information, the first time humans discovered and explored the Mariana Trench was in the 1870s. The British embarked on the Marine Census Program in December 1872, and the task was carried out by the Royal Challenger, which arrived in the Mariana Islands in the western Pacific Ocean for an expedition in the third year of the program. And because the international exploration technology for the ocean at that time was very limited, the method of measuring the depth of the ocean was also very simple, the way taken by the United Kingdom at that time was to tie the heavy object with a rope and throw it into the sea, waiting for the heavy object to completely sink into the seabed and no longer continue to sink, and then the rope was drawn up and marked, and the depth of the ocean was determined by measuring the length of the rope sinking.
What caught the challengers off guard was that the extra 8,000 meters of rope they carried had come to an end, but the weight had not yet bottomed out and needed to continue to sink. The Challenger then added several ropes to return to the same place for measurements, but it was still difficult to obtain results, and eventually called the area the "Challenger Abyss", which was actually the Mariana Trench. After the relevant reports were issued in britain, many countries in the world that thought they had the strength of marine surveying rushed to go first, but almost all of them eventually turned back.
Measure the depth of the Mariana Trench and find that it swallows up huge amounts of seawater
The first representative measurement was that the British Challenger measured that the depth of the "abyss" was at least 10,900 meters. Subsequently, the US Navy's "Trieste" deep submersible successfully entered in 1960 and detected a depth of 10916 meters, breaking the previous british measurements and becoming a new world record. After this, the Japanese Takuyo also successfully entered the trench and measured a maximum depth of 11040.41 meters, which was also recorded in the world record.
It is worth mentioning that as the measured depth is constantly updated, speculations about exactly how the area was formed are also constantly being made. The theory of the earth's plate movement continues to mature, and it is widely believed that the area is a trench formed by the mutual movement of the Philippine plate and the Pacific plate, and geologists believe that the Philippine plate is formed by the subduction of the Pacific Ocean, and it is named the Mariana Trench.
The first report of the Mariana Trench swallowing up ocean waters was a few years ago, when European reports of mysterious openings in the waters off Spain, the depth of which is difficult to predict by humans, the only certainty is that the mysterious opening is constantly devouring the sea. Later, the detectors in the United States, britain, and Japan successfully arrived in the local area and transmitted data, only to discover the world's deepest trench, according to the results transmitted by the probe, it was confirmed that the trench did continue to swallow seawater, and the annual water swallowing reached 3 billion tons. Experts conclude by analogy that the Mariana Trench was formed about 60 million years ago, and that the seawater swallowed by it has been able to submerge any continent on Earth.
Why isn't sea level falling?
When they recognized that the abyss-like trench was constantly swallowing up huge amounts of ocean water, but the sea level did not fall because of it, at first the experts were puzzled by this. Finally, experts found that after the Mariana Trench swallowed seawater, it would enter the upper mantle, and in the strong pressure of the upper mantle, the material of the ocean water asthenosphere reacted, merged into the asthenosphere, and became a substance, and this mass would be transformed into backwater vapor by volcanic eruptions, then evaporated back to the atmosphere, and then came to the earth's surface through precipitation. After a series of morphological changes, the swallowed ocean water returns to the ocean. Experts also said that the swallowed ocean water may not all enter the mantle, and it is not excluded that some of it will become groundwater along the gaps in the earth's crust, but it will eventually return to the ocean due to the circulation of the earth's water resources. So even though the Mariana Trench swallows up a huge amount of seawater every year, it is part of the ocean cycle.
In fact, in addition to the Mariana Trench constantly devouring seawater, scientists have also found that there are many trenches on Earth that are constantly devouring seawater. So far, as many as 30 trenches have been detected and swallowed, of which 17 are large trenches and the rest are small ditches, but the most swallowed seawater is the Mariana Trench. But this has not caused the earth's oceans to dry up, and even the sea level has not dropped as a result. The current international research results are that the swallowed seawater does not disappear out of thin air, let alone be consumed, but participates in the water cycle in other ways. After a series of complex cycles, the swallowed seawater has the opportunity to return to the surface or the atmosphere, although it takes a long time, but whether the water vapor enters the atmosphere and undergoes complex temperature changes, it eventually forms the form of rainfall and falls back into the ocean; Still circulated as groundwater, it is ultimately in the earth's water circulation system.
Not only is sea level not falling, it is even rising, and the judgment given by experts is the "greenhouse effect". Because as the Earth's temperature rises, glaciers that were not involved in the water cycle melt and then enter the ocean, causing sea levels to rise. If the sea level continues to rise, the seizure of plateaus as a place of residence will become the mainstream trend, or it will trigger a series of problems that threaten the sustainable development of human civilization. Therefore, the earth is the only home for human beings to survive, the protection of the earth's environment is everyone's responsibility is not an empty word, but should be implemented on every individual on the earth, the continent has taken the lead in issuing "carbon peak" and "carbon neutrality" plans, and is trying to achieve.