2021 SkS Weekly Climate Change & Global Warming News Roundup #9

A chronological listing of news articles linked to on the Skeptical Science Facebook Page during the past week: Sun, Feb 21, 2021 through Sat, Feb 27, 2021

Editor's Choice

Climate Change is Weakening the Ocean Currents That Shape Weather on Both Sides of the Atlantic

The change in the main ocean heat pump could bring more heat waves to Europe, increase sea level rise in North America and force fish to move farther north.

Ocean Surface

Since the end of the last ice age, a swirling system of ocean-spanning currents has churned consistently in the Atlantic, distributing heat energy along the ocean surface from the tropics toward the poles, with heavy, cold water slowly flowing back toward the equator along the bottom of the sea.

Collectively known as the Atlantic Meridional Overturning Circulation, the currents played a key role in shaping the climate of eastern North America and Western Europe, and thus the development of civilizations there. But in the 20th century, the circulation has weakened more than at any other time during at least the last 1,000 years, new research shows.

Together with other studies showing that global warming is driving the weakening, the new findings suggest that the circulation will lose even more strength in the decades ahead. That could cause heat and cold extremes in Europe and rapid sea level rise along the East Coast of the United States. As it weakens, pools of warm water form. That can lead to ocean heat waves, with increasing evidence that overheating oceans are linked with droughts and heat waves on nearby land areas.

The overturning circulation loops like a 10,000-mile conveyor belt through the North and South  Atlantic, connecting polar regions. It brings cold water up from the deep, sends warmer water across the surface and then drops it back down thousands of miles away as it cools. 

Click here to access the entire article as originally posed on the Inside Climate News website. 

Climate Change is Weakening the Ocean Currents That Shape Weather on Both Sides of the Atlantic by Bob Berwyn, Inside Climate News, Feb 25, 2021

Articles Linked to on Facebook

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Sat, Feb 27, 2021

Posted by John Hartz on Saturday, 27 February, 2021

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