“In recent decades the ocean has continued to warm substantially, and with time the warming signal is reaching deeper into the ocean,” said LLNL (Lawrence Livermore National Laboratory) scientist Peter Gleckler, lead author of a paper published in the journal Nature Climate Change in California, US.

Changes in ocean heat storage are important because the ocean absorbs more than 90 percent of the Earth’s excess heat increase that is associated with global warming. The observed ocean and atmosphere warming is a result of continuing greenhouse gas emissions.

Human Activity Has Doubled Heat In World’s Oceans In recent Decades:

By including measurements from a 19th-century oceanographic expedition and recent changes in the deeper ocean, the study indicated that half of the accumulated heat during the industrial era has occurred in recent decades, with about a third residing in the deeper oceans.

In the 18 years since 1997, the oceans have absorbed the same amount of energy — about 150 zetajoules — as they did between 1865 and 1997, researchers report in the journal Nature Climate Change. Scientists have long been aware that 90 percent of all man-made heat energy ends up in the globe’s oceans.

“Given the importance of the ocean warming signal for understanding our changing climate, it is high time to measure the global ocean systematically from the surface to the ocean floor,” said NOAA (National Oceanic and Atmospheric Administration) oceanographer Gregory Johnson.

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