As circulation of waters in the deep ocean slows, it reduces the ability of oceans to absorb carbon dioxide and heat. Read more at straitstimes.com.
PARIS - Climate change-driven shifts in the circulation of waters to the deepest reaches of the ocean around Antarctica, which could reverberate across the planet and intensify global warming, are happening decades “ahead of schedule”, according to new research.
An earlier study using computer models suggested “overturning circulation” of waters in the deepest reaches of the oceans would slow by 40 per cent by 2050 if emissions remain high. The implications could be significant, with Antarctica’s deep ocean acting as a key “pump” for the global network of ocean currents.
Oceans are a crucial regulator of the climate, absorbing large amounts of the additional planet-warming carbon that humans have pumped into the atmosphere since the mid-1800s, as well as more than 90 per cent of the increased heat. This is disrupting the process that carries nutrient- and oxygen-rich warmer waters down into the deep ocean, a key life support function for marine life.
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