For years, scientists have warned of the rising global temperatures and melting ice sheets.
'Because 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.
The new analysis shows that the warming of the oceans corresponds to the measurement data of the rising air temperatures.
And "observational records of ocean heat content show that ocean warming is accelerating", the authors in China and the United States wrote in the journal Science of ocean waters down to 2,000 metres (6,600 ft).
When we see the effects of climate change around us, we mostly think about increasing temperatures in the atmosphere.
A warmer ocean causes sea level to rise, bringing problems like unsafe coastal flooding.
The worldwide team analyzed a number of new studies assessing ocean temperatures to conclude that ocean warming is "stronger" than predicted by previous research.
About 93 percent of the mainly through the burning of fossil fuels in addition to heat generated will be so far absorbed by the oceans. Ocean temperatures cited in the paper are recorded using the Argo network comprised of nearly 4,000 robot floats that stay on the surface most of the time but dive to 2,000 meters every few days to measure ocean temperature, pH, salinity, and other details. Also, the quality of older ocean data has been substantially improved, and there are both better and independent methods that account for the sparseness of ocean data before Argo era.
"The global warming signal is a lot easier to detect if it is changing in the oceans than on the surface".
'For example, even if we meet the target of Paris Agreement (to limit climate change), ocean will continue warming and sea level will continue rise. According to Lijing Cheng, one of the study's authors, temperatures down to 2,000 meters rose about 0.1 degree Celsius (0.18F) between 1971-2010, according to Reuters. "In fact, the ocean is saving us from massive warming right now".
In the same direction, the European Union's Copernicus Climate Change Service estimated that 2018 had been the hottest year regarding global surface temperature.
The prediction is over four times more than estimates from the UN Intergovernmental Panel on Climate Change suggesting the oceans were taking up around 8 Zetajoules of energy each year - an "8" followed by a whopping 21 zeros.
Ocean warming is reducing the levels of oxygen in the oceans and affects the coral reefs around the world.