Arctic warming began sooner than thought, closer to human industrialisation

The video discusses the warming of oceans over decades, with a focus on a study that used marine debris to reconstruct 800 years of data. It highlights the stability of Arctic waters until the early 1900s, when heat and salt from the Atlantic began to rise, possibly due to human-induced carbon dioxide emissions. The study suggests changes in Atlantic Meridional Overturning Circulation currents may have contributed. A feedback loop is described, where melting ice leads to further warming as the dark ocean absorbs more heat.

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