"The global warming signal is a lot easier to detect if it is changing in the oceans than on the surface".
Scientists say the warming seas are damaging coral reefs and marine life, and forcing fish to find deeper and colder waters.
"Ocean heating is a very important indicator of climate change, and we have robust evidence that it is warming more rapidly than we thought", said co-author Zeke Hausfather, a graduate student in the Energy and Resources Group at the University of California, Berkeley.
The new analysis shows that the warming of the oceans corresponds to the measurement data of the rising air temperatures.
This thermal expansion will lead to a temperature rise of 0.78 degrees Celsius by the end of the century - raising sea levels a foot (30cm) on top of that caused by melting glaciers and ice sheets. The new article, led by Dr. Lijing Cheng of the Institute of Atmospheric Physics, Chinese Academy of Sciences, highlights how the new observations along with adjusted older records now clearly show not only how the ocean is warming but that the warming is accelerating.
And today, researchers writing in the journal Science claim the warming of oceans worldwide since the 1970s has happened 40 per cent faster than previously estimated.
That network has provided consistent data on ocean temperatures and other metrics since the mid-2000s.
The fourth takes a completely different approach, using the fact that a warming ocean releases oxygen to the atmosphere to calculate ocean warming from changes in atmospheric oxygen concentrations, while accounting for other factors, like burning fossil fuels, that also change atmospheric oxygen levels.
According to the investigation, the temperature of the oceans have increased in a depth of up to 2000 meters between 1971-2010 by 0.1 degrees Celsius.
A warmer ocean causes sea level to rise, bringing problems like risky coastal flooding.
The U.S. joined the deal last month despite President Donald Trump's 2017 pledge to withdraw the country from the Paris accord. The 2013 United Nations assessment estimated slower rates of heat uptake but did not give a single comparable number.
This drive, according to the study of the oceans and diving every couple of days to a depth of 2000 meters, to measure data such as temperature and pH-value. Ocean temperatures are reportedly not affected by functions that occur annually like El Nino.
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. It has also contributed to increases in rainfall intensity and stronger, longer-lasting storms, such as Harvey in 2017 and Florence in 2018.