Worlds Oceans Have Absorbed 90 Percent Of Energy From Climate Change In Last 150 Years

A century and a half of rebuilt data is helping scientists paint a picture of how much energy the world’s oceans are assimilating from human-made greenhouse gas emissions( GHG) and, as a result, how temperatures have changed since the 19 th century. Estimations suggest that from 1871 until now, global warming of our oceans is at 436 x 10^ 21 Joules, which, if you’re not a physics buff, is roughly 1,000 periods the amount of energy used by humen every year.

The Guardian reports that its staff crunched the numbers and found that the “average heating across that 150 -year period was equivalent to about 1.5 Hiroshima-size atom bomb per second.” They say that figure has accelerated over hour as emissions continue to rise , now equaling between three and six atomic bombs per second.

IFLScience reached out to study author Laure Zanna for her take on the analogy. She said, “we prefer to avoid this analogy and favor a comparing between the hot assimilated by oceans and annual human energy consumption, or how many beakers of tea one can induce that amount of heat.”( It’s unclear exactly how many cups that equates to .)

“But patently, we are putting a lot of extravagance energy into the climate system and a lot of that aims up into the sea. There is no doubt, ” she added. Prior to now, a lack of records has limited researchers in their ability to estimate historic temperature fluctuations in oceans around the world. Now, researchers have employed a new method that takes on a mathematical approach.

Atlantic Ocean
Cumulative heat uptake from 1871 to 2017( joules per year) shown for each patch contributing to the storage of hot( A) globally and( B) in the Atlantic Ocean.( Note the different scales for the two panels ). Proceedings of the National Academy of Sciences

“Our approach is akin to’ painting’ different bits of the ocean surface with dyes of various types of colourings and monitoring how they spread into the interior over time. We can then apply that information to anything else- for example humanmade carbon or hot anomalies- that is transported by ocean circulation, ” explained learn writer Samar Khatiwala in a statement. “If we know what the sea surface temperature anomaly was in 1870 in the North Atlantic Ocean, we are going to be able figure out how much it contributes to the warming in, say, the deep Indian Ocean in 2018. The idea goes back virtually 200 years to the English mathematician George Green.”

The team utilized ocean circulation modelings with observed surface temperatures to reconstruct the full profile of temperature changes over the last 150 times. They found that since 1955, up to half of warming in the low- and mid-latitudes of the Atlantic Ocean can be attributed to ocean circulation that has accumulated heat in the area.

Publishing their work in the Proceedings of the National Academy of Sciences, the authors had pointed out that uncovering ocean circulation changes can help predict future patterns of warming and sea level rise, but there is still work to do to corroborate their method and provide even more accurate calculates. Their technique applies to human-made carbon transported by ocean currents, but hot doesn’t ever behave in this way. Instead, it affects circulation by changing the concentration of seawater.

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