Sunday , July 25 2021

Ocean absorbs more than 60% of world warmth – BBC News BBC



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New studies show that. The ocean absorbs heat in the world than it had expected.

A team of researchers from Princeton University and the US Institute of Scientific Research A new study in the Nature magazine, which points out that the world's ocean absorbs excess heat from the greenhouse effect is more than expected by 60%, making efforts to stop global warming even more difficult.

Over the past 25 years, between 1991 and 2016, the team discovered that the ocean absorbed more than 13 times the amount of surplus energy in the world or Zettajoules. The value is 13, followed by 21 zeros.

The heat causes the sea to rise by an average of 6.5 degrees Celsius per decade. This is higher than the United Nations Intergovernmental Conference on Climate Change (IPCC). The forecast is expected to average about 4.5 degrees Celsius per decade.

The heat energy of the ocean absorbs from the surface and the Earth's atmosphere stands for 150 times the energy consumed worldwide over the same period. This is 60% higher than the previous estimate.

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Researchers indicate that sea levels can rise faster than previously predicted.

Earlier, researchers only know. The ocean absorbs excess heat generated by global warming by about 90%, but is not aware of the trend in the number of annual heating bills. It is hard to estimate how to properly plan for climate change.

Dr. Lorraine Plantey, a research director at Princeton University, said: The result is worrying that the international community will not be able to meet the IPCC's goal of limiting global temperatures to increase above 1.5 degrees Celsius.

"Stop global warming" To limit global temperatures to over 1.5 degrees Celsius from pre-industrial levels. It is considered to be very difficult already. But our results point out that this plan has many difficulties. Because of the heat in the ocean, the world is less supportive of greenhouse gas emissions, says Dr. Plan.

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VICTOR HUANG

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The increased heat causes the oxygen level in the ocean to fall. Impact on many marine organisms.

In addition, warming of more oxygen and carbon dioxide is released. Underwater ecosystems are affected by lower oxygen levels. The expansion of water due to heat (thermal expansion) also increased sea level faster.

The team used a more precise ocean-based heat methodology in its latest study. In addition to the nearly 4000 Argo marine measurement and temperature sensing buoys that have been installed around the world. It also measures the amount of oxygen and carbon dioxide in the air. The ocean spills out as the temperature rises. This method makes the old information known for many years back. And calculated to know the heat rise in the ocean.

Dr. Parkinson also warned. The great heat that the ocean absorbs. It can be recycled within the next hundred years. According to the changing cycle of ocean currents, which controls the absorption and degradation of the ocean. This means stopping global warming in the next centuries. There are uncomfortable situations to wait.


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