North Atlantic cold blob cooled almost 1°C since 1900
There's a stubborn "cold blob" in the North Atlantic that's actually getting cooler while the rest of the ocean warms up.
Scientists say it's dropped by almost one degree Celsius since 1900, and it's tied to a slowdown in the Atlantic Meridional Overturning Circulation (AMOC), the ocean system that helps balance Earth's climate.
If this trend continues, it could seriously shake up weather and sea levels around the world.
Glacier melt weakens AMOC
Researchers found the cold isn't just on the surface: it goes deep, so it's not just about wind or weather.
The main culprit is melting glaciers sending extra freshwater into the ocean, which messes with salt and temperature levels and weakens AMOC even more.
Experts warn AMOC might be at its weakest in a thousand years, which means faster sea level rise on America's East Coast, colder temperatures in Europe, and shifting rain patterns for places like Africa.