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Is a key ocean current system slowing down? A new study adds to the debate

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By illuminem briefings

· 2 min read


illuminem summarizes for you the essential news of the day. Read the full piece on The Washington Post or enjoy below:

🗞️ Driving the news: A new study using updated computer models finds no evidence that the Atlantic Meridional Overturning Circulation (AMOC) has weakened significantly over the past 60 years, challenging prior research suggesting a slowdown
Instead, variability observed in recent decades is attributed to natural atmospheric changes
However, researchers caution that future weakening is still expected due to climate change

🔭 The context: The AMOC, a critical ocean current system, distributes heat, water, and nutrients across the Atlantic, influencing weather patterns globally
Previous studies linked a “cold blob” in the North Atlantic to AMOC decline, but the new study emphasizes air-sea heat exchanges as a more reliable indicator
Despite debates, the timing and severity of a potential AMOC slowdown remain uncertain

🌍 Why it matters for the planet: A weakened AMOC could disrupt global weather, reduce rainfall in key regions like Southeast Asia and Africa, and destabilize agriculture and fisheries
This would also impact Western Europe’s climate and lead to migration pressures due to shifting habitable zones
Understanding the AMOC’s stability is critical for climate mitigation planning

⏭️ What's next: Direct observations are needed to confirm long-term AMOC trends. The study underscores the importance of urgent climate action to minimize the risk of AMOC destabilization
Experts emphasize that even if no current decline is observed, future risks from climate-driven changes remain significant

💬 One quote: “We still fully expect the AMOC to decline in the future. If it is more stable than previously thought, it is good news because it gives us time to act.” – Nicholas Foukal, study co-author

📈 One stat: Approximately 44 ocean experts issued a public letter in October urging rapid climate action to prevent AMOC weakening or collapse

Click for more news covering the latest on climate change

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