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Ocean temperatures rising faster than thought in delayed response to global warming: scientists

LONDON – The world's oceans are rising in temperature than previously believed as they absorb most of the world's growing…

The world’s oceans are rising in temperature than previously believed as they absorb most of the world’s growing climate-changing emissions, scientists said Thursday. been setting records repeatedly over the last decade, with 2018 expected to be the hottest year, displacing the 2017 record, according to an analysis by the Chinese Academy of Sciences.

That is driving rising sea levels as oceans warm and expand and is helping fuel more intense hurricanes and other extreme weather, scientists warn.

published this week in the journal Science

“It’s mainly driven by the accumulation of greenhouse gases such as carbon dioxide in the atmosphere due to human activit ies, ”said Lijing Cheng, a lead author of the Chinese Academy of Sciences study.

The increasing rate of ocean warming” is a signature of increasing greenhouse gases in the atmosphere, “Cheng said.

Leading climate scientists said in October that the world has about 1

2 years left to shift the world away from still rising emissions towards cleaner renewable energy systems, or risk facing some of the worst impacts of climate change.

Those include water and food shortages , Argo has been used for monitor changes in ocean temperatures, Cheng said, leading to more reliable data that is. the base for the new ocean heat records.

The system uses almost 4,000 drifting ocean robots that dive to a depth of 2,000 meters every few days, recording temperature and other indicators as they float back to he surface.

Through the data collected, scientists have documented increases in rainfall intensity and more powerful storms such as Harvey Harvey in 2017 and Florence in 2018.

Cheng explained that oceans are the energy source for storms, and can fuel more powerful ones as temperatures – a measure of energy – rise.

Storms over the 2050-2100 period are expected to be more powerful than storms from the 1950-2000 period, the scientist said. , which have so far absorbed over 90 percent of the additional solar energy trapped by rising emissions, will see continued temperature hikes in the future.

“Because of the ocean has large heat capacity, it is characterized as a” delayed response “to global warming, which means that the ocean warming could be more serious in the future, “the researcher said.

” For example, even if we measure the target of Paris agreement (to limit climate change), ocean will cont warming and sea level will continue to rise. Their impacts will continue. ”

If the targets of the Paris deal to keep warm to 2 degrees C, or preferably 1.5, can be met, however, the expected damage by 2100 could be halved, Cheng said.

For now, however, climate change emissions continue to rise, and “I don’t think enough is done to tackle the rising temperatures,” Cheng said.

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