The World’s Oceans Are Losing Oxygen. Here’s Why That’s a Big Problem

Researchers say the oceans on Earth are gradually losing oxygen. It is a big problem for every living marine animal and highlights the serious consequences of climate change.

A new nature study published this week discovered that over the past half century, the global oceanic oxygen content has declined by more than 2%. Changes may appear to be small, but scientists say that even small changes in gas levels can change the entire ecosystem.

"This is very important," says Rob Dumber, professor of earth science at Stanford University. "Anything that is embarrassed will be taken care of and noticed."

Dunbar is studying marine climate change in the tropics and Antarctica, but has not studied nature, but said that oxygen droplets could have a ripple effect with dark blue. Large marine animals such as sharks require more oxygen, especially for high energy activities such as feeding. According to Mr. Dunbar, if the oxygen level is lowered, depending on the marine organisms, "a no-entry area" is formed, the food and the breeding ground will be reduced.

Marine economy and fishery are subject to the pressure of overfishing and pollution and are being hit by the loss of ocean oxygen. According to a natural study conducted at the Helmholtz Marine Research Center in GEOMAR, Germany, changes in natural gas levels resulted in a "potentially bad effect". It is difficult for scientists to identify the effects of certain marine animals. Because they are also affected by human activities including fishing and dumping.

The authors of this study mapped the global oxygen levels in the ocean between 1960 and 2010. 2% data generally considers the oxygen level, the greatest decrease in oxygen in the North Pacific and the Arctic Ocean

The gas level in the sea is partially controlled by the seawater temperature. When the water gets hot, gases such as oxygen, nitrogen and carbon dioxide disappear from the ocean. Deng Bo said: "When you simmer tea, one thing you are doing is to disinfect the water." "It is based on simple chemical reactions."

The same idea can be applied when considering a large amount of water. Mr. Dunbar said that as the water warms from the hot atmosphere, oxygen leaves the sea. "Global warming is happening in the sea," he said. "The fact still exists and the sea is warming."

According to the scientific study of 2014, the world ocean temperature rose more than half a centigrade between 1960 and 2010.

Mr. Dunbar warned that this model will continue to exist, which will have severe consequences for marine organisms. He said, "A further 2% increase will have a major impact after 30 or 40 years," he said.

The sea is losing oxygen. Last week, in a comprehensive analysis of scientific journals, scientists revealed that the area of ​​the oxygen-free region of the high seas expanded in the high seas while the amount of oxygen-free oceans increased fourfold in the past 50 years I made it. Main causes of the European Union: Global warming and pollution Warm seawater keeps less oxygen and increases oxygen consumption by global microorganisms. At the same time, agricultural outflow and sewage grow algae that asphyxiate

Researchers have determined that the "lowest oxygen" region of the open ocean has expanded to the EU scale since 1950. The study found that at that time the amount of seawater completely oxygen free increased more than 4 times. The number of oxygen - free or anoxic - free areas in the coastal area increased from 50 to 500 to 10 times. Our study had a serious impact on coastal planners. Global warming is raising the sea level of the Atlantic coast and the community should prepare for it. Furthermore, our results show that ocean-atmosphere interactions in the Pacific and Atlantic basins can cause the sea level to rise above this level by more than 4 inches within five years. This fluctuation may occur between 5 years and 10 years

Global warming is beginning to show the impact it has on the world's water resources. Oxygen content in the sea declines in the ocean, making breathing of the bottom fresh fish difficult. In some natural hypoxic hot spots such as East Pacific, the water level is expected to continue declining. "Improvement in water management can bring high economic benefits: Government enhances efficiency and dealing with water shortages by reducing 25% of water to higher value applications (reduction of loss) Part The area may even disappear, "the report pointed out.