Credit: NOAA/Unsplash

Marine heatwaves deep in oceans may be underreported, researchers warn

A new study suggests that deep-ocean heatwaves, which can cause serious damage to marine ecosystems, are being overlooked due to the focus on surface-level events.

Farah Master reports for Reuters.

In short:

Marine heatwaves occurring below 100 meters are often missed, even though 80% of them are independent of surface-level warming.
The study found that deep heatwaves are driven by ocean currents and eddies, affecting marine habitats and species at a greater depth.
These subsurface events have serious ecological and economic impacts as they disrupt the marine food chain and critical ecosystems like coral reefs.

Key quote:

"Extreme temperature events below the sea surface are of greater ecological concern because they affect the habitat of most marine primary producers and consumers."

— Joint study by Australia's national science agency and the Chinese Academy of Sciences

Why this matters:

Subsurface marine heatwaves can devastate marine life, threaten fisheries and worsen global food insecurity. Monitoring deeper ocean temperatures is crucial as climate change accelerates these events.

www.reuters.com

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