China-led study shows world's oceans hottest on record in 2019


"The warming of the ocean will continue even if the average global surface temperature can stabilize at two degrees Celsius or less", Cheng said. To arrive at this temperature, according to scientists, the ocean would have taken in 228,000,000,000,000,000,000,000 (228 Sextillion) Joules of heat. "The amount of heat we have put in the world's oceans in the past 25 years equals to 3.6 billion Hiroshima atom bomb explosions", Cheng added.

With just 1C of warming since the pre-industrial period, Earth has experienced a cascade of droughts, superstorms, floods and wildfires made more likely by climate change.

A team of experts from around the world looked at data compiled by China's Institute of Atmospheric Physics (IAP) to gain a clear picture of ocean warmth to a depth of 2,000 metres over several decades.

The scientists, who examined heat trends dating back to the 1950s, believe the rise has decimated marine life and killed 100million cod. They managed to calculate ocean temperatures down to 2,000 meters (6,500 feet) using observations from a variety of measurement devices from the World Ocean Database of the National Oceanic and Atmospheric Administration (NOAA).

The study, published in Advances in Atmospheric Sciences, found that the ocean was 0.075 ° C warmer a year ago than the historical average between 1981 and 2010.

The researchers also compared the 1987 to 2019 data recording period to the 1955 to 1986 period.

Since 1970, more than 90 percent of the planet's excess heat went into the oceans, while less than 4 percent was absorbed by the atmosphere and the land, the study said.

"We are now at five to six Hiroshima bombs of heat each second", study co-author John Abraham, a professor of mechanical engineering at the University of St. Thomas, told a private source.

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"That's where the vast majority of heat ends up".

Although warming was distributed across the world's oceans, it was more pronounced in the Atlantic and Southern Ocean, where several severe marine heatwaves have also been recorded in recent years.

"A substantial marine heat wave with similar consequences for marine life occurred in the south Tasman Sea in 2015".

That means that the ocean - which absorbs nearly all of the greenhouse gases humans spew into the atmosphere - has taken in 228 sextillian (228,000,000,000,000,000,000,000) joules of heat above its average, according to a statement.

The new method allowed them to take the limited temperature observations from the pre-Argo era and extrapolate them into a broader understanding of past ocean temperature. According to Moody's Analytics, an economic research organization, the storm caused 53 deaths and between $38 and $50 billion in economic damage.

But the impacts of warming oceans don't remain at sea.

That is a tough quantity to contextualize, so one of many scientists behind the examine did the maths to place it into an explosive body of reference - by evaluating it to the quantity of power launched by the atomic bomb, the USA navy dropped on Hiroshima, Japan, in 1945.

There is only one way to help reduce ocean temperatures, Dr Cheng said.