Oceans Heating up Like '3.6 Billion Hiroshima Atom-Bomb Explosions'
par Amanda Heroux
dans Science
The figure is a lot to handle, so lead author Lijing Cheng compared the heat to the Hiroshima atom-bomb, which exploded with a blast energy of about 63,000,000,000,000 Joules. Other than the human emissions of gases that trap heat, there are no sensible alternatives to explain this warming.
In 2019, water temperatures in the oceans at depths of up to two kilometers were 0.075 degrees higher than the 1981-2010 average, Deutsche Welle reported. Around 3.6 billion Hiroshima atom-bomb explosions have been added to the world's ocean in the past quarter-century.
"This [amount of] energy could supercharge typhoons/hurricanes, support marine heatwaves, and cause damage to human and other life on Earth". "The increasing heat increases evaporation, and the extra moisture in the warmer atmosphere nourishes heavy rains and promotes flooding... leading to a more extreme hydrological cycle and more extreme weather in particular hurricanes and typhoons", they warned. "More than 90% of the heat accumulates in the ocean because of its large heat capacity, and the remaining heating manifests as atmospheric warming, a drying and warming landmass, and melting of land and sea ice".
He added: "Global warming is real, and it's getting worse".
"Areas that are now wet, will likely become more wet".
The same professor, John Abraham, continued and said that "The findings, to be honest, were not unexpected".
An worldwide team of scientists said there were "no reasonable alternatives" to explain the trend other than heat emitted by humans. "The Blob was a notable one in 2014 and led to major consequences for all of marine ecosystems, from plankton to fish to marine mammals and birds".
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In this case, the warming of the oceans is accelerated by climate change.
Out of this analysis, they found that over the past 60 years, the more recent warming was about 450 per cent that of the earlier warming, which reflected a huge increase in the rate of climate change globally.
To reach current temperatures, the ocean would have absorbed 228,000,000,000,000,000,000 (228 sextillion) joules of heat.
They therefore provide a much more stable indication of warming trends. However, just because we humans live on land, it does not mean we are immune to the effects coming from the warming ocean waters.
It also found that the rate of warming over the 1987 to 2019 period was four-and-a-half times that recorded between 1955 to 1986, reflecting a major increase in the rate of global climate change. The zonal and vertical sections are organized around Southern Ocean in the center.
"I'm particularly anxious about the effect of Southern Ocean warming on the destabilization of the Antarctic Ice Shelves, which could lead to not only feet but meters of sea level rise by the end of this century", Mann told UPI.
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