The Atlantic's 'Cold Blob' Could Change Weather Across America
Summary
Scientists have found that a cool area of ocean called the North Atlantic "cold blob" might show that a major Atlantic ocean current, the Atlantic Meridional Overturning Circulation (AMOC), is weakening. This change in the ocean flow could affect weather, sea levels, and flooding along the U.S. East Coast and other parts of the Atlantic region.Key Facts
- The North Atlantic "cold blob" is an unusually cool patch of water south-east of Greenland.
- This cold area stays cool even as most oceans warm due to climate change.
- The cold blob is likely caused by a weakening of the AMOC, a large ocean current system.
- The AMOC moves warm salty water north and cold water south, helping balance temperatures.
- Melting Greenland ice adds freshwater, which slows the sinking part of the AMOC circulation.
- A weaker AMOC may cause higher sea levels and more flooding on the U.S. East Coast.
- Changes in the AMOC could also shift rainfall and storm patterns in North America.
- Scientists do not yet know exactly how these changes will affect specific U.S. regions.
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