Saturday , May 8 2021

Ocean absorbs more than 60% of the world's heat – BBC News BBC



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Recent studies show that. Ocean absorbs the warmth of the world than it expected.

A team of scientists from Princeton University and the American Institute for Scientific Research A recent study in Nature that suggests that the world's oceans absorb excess greenhouse gas emissions is more than 60%, which is even more difficult to stop global warming.

In the last 25 years, between 1991 and 2016, the team found that the ocean absorbed more than 13 times the excess of surplus energy in the world, or Zettajoules. The value is 13, followed by 21 zero.

Heat causes the ocean to rise by an average of 6.5 degrees Celsius by a decade. This is greater than the estimate of the United Nations Intergovernmental Panel on Climate Change (IPCC). It is expected that the forecast will be around 4.5 degrees Celsius per decade.

Ocean thermal energy absorbs from the surface, and Earth's atmosphere each year makes 150 times more energy consumption in the world in the same period. This is 60% more than the previous estimate.

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Researchers point out that sea levels can grow faster than previously predicted.

Previously, scientists only know. Oceans absorb excess heat generated by global warming by about 90 percent, but is not aware of the trend in the number of annual heating bills. It is difficult to assess how to properly plan climate change.

Dr. Lorraine Plantey, head of research at Princeton University, said: Discovery is worrying that the international community will not be able to meet the IPCC's goal of limiting global temperatures to over 1.5 degrees Celsius.

"Stop global warming" To limit global temperatures to more than 1.5 degrees Celsius from pre-industrial levels. It is already considered very difficult. But our findings point to it This plan has many difficulties. Because of the heat in the ocean, the world is less supportive of greenhouse gas emissions, "Dr. Planen said.

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Increased heat causes a drop in oxygen levels in the sea. Influence on many marine organisms.

In addition, ocean warming releases more oxygen and carbon dioxide. Underwater ecosystems operate at lower oxygen levels. Expansion of water for heat (thermal expansion) also increased the sea level faster.

The team used a more precise methodology of ocean temperature measurement in its latest study. Apart from nearly 4,000 Argo marine geodetic and temperature sensitive buoys, which are installed around the world. It also measures the amount of oxygen and carbon dioxide in the air. Oceans spit when the temperature rises. By this method, old data is known for many years. And it is calculated to know that the heat in the sea increases.

Dr. Parkinson also warned. The huge heat the ocean absorbs. It can recover in the next several hundred years. According to a variable cycle of ocean currents, which control the absorption and degradation of the ocean. This means stopping global warming over the next few centuries. There are some awkward situations to wait for.


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