Ocean temperature rises faster than we thought in a "delayed response" to global warming: scientists


World oceans are rising faster than previously assumed, as they absorb most of the world's rising climatic emissions, scientists said.

Over the past decade, the ocean, which has been seen by thousands of floating robots, has repeatedly been repeated over the past ten years, and is expected to be the hottest in 2018, which showed that the 2017 record is in line with the analysis of the Chinese Academy of Sciences .

This is fueled by the rising sea level, as the oceans are warm and expanding, helping to propel more intense hurricanes and other extreme weather conditions, scientists warn.

The warming, measured since 1960, is faster than predicted by scientists in the 2013 IPCC report on the ocean warming, according to a study published this week in Science.

"This is mainly due to the build-up of greenhouse gases, such as carbon dioxide in the atmosphere due to human activities," said Lijing Cheng, lead author of the study of the Chinese Academy of Sciences.

The rising degree of ocean warming "is simply the signature of increased greenhouse gases in the atmosphere," Cheng said.

Leading climate scientists said in October that the world was about 12 years old to shift the world from still rising emissions to cleaner renewable energy systems or facing some of the worst effects of climate change.

These include a worsening of water and food shortages, stronger storms, heat waves and other extreme weather conditions and rising seas.

Over the past 13 years, the Ocean Observing System, called Argo, was used to observe changes in sea temperature, said Cheng, which led to more reliable data that are the basis for new Ocean data.

The system uses almost 4,000 floating robots, which dig into the depth of 2,000 meters every couple of days, record the temperature and other indicators when they return to the surface.

With the help of the collected data, scientists documented an increase in precipitation intensity and a stronger storm, such as the Harvey hurricanes in 2017 and Florence in 2018.

Cheng explained that the oceans are a source of energy for storms and that they can drive stronger, since temperatures are a measure of energy increase.

Storms are expected to be stronger than storms from the period 1950-2000 in the period 2050-2100, said the scientist.

Cheng said that oceans that have so far absorbed more than 90 percent of additional solar energy captured by rising emissions will see an increase in temperature in the future.

"Because the ocean has a lot of heat capacity, it is labeled a" delayed response "to global warming, which means that the ocean warming may be more serious in the future," said the researcher.

"For example, even if we meet the goal of the Paris Agreement (to limit climate change), the ocean will continue to warm up and the sea level will continue to increase. Their effects will continue. "

If it is possible to achieve the goals of the Paris agreement, to achieve a "very low" level of 2 degrees C, or possibly 1.5, the expected damage can be halved by the year 2100, Cheng said.

For now, climate change emissions continue to increase, and "I do not think there has been enough effort to tackle rising temperatures," Cheng said.


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