オランダの研究チームは、ベーリング海峡に巨大なダムを建設することで、大西洋南北熱塩循環（AMOC）の崩壊を防げる可能性があるというシミュレーション結果を発表しました。この提案は、今月ウィーンで開催された主要な地球科学会議で示されたものです。
ユトレヒト大学のイェレ・ソーンス氏とヘンク・ダイクストラ氏は、高度な気候モデルを用いたシミュレーションを行い、同海峡を閉鎖することでAMOCが強化されることを明らかにしました。特に2050年までに建設を開始した場合、その効果が高いとしています。以前の低解像度モデルによる研究では結果が分かれていましたが、今回のスーパーコンピューターによる解析では、北ヨーロッパに温暖な気候をもたらす海流システムが驚くほど強力に回復することが示されました。
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Iran has claimed the Strait of Hormuz is closed after a surge of attacks on commercial vessels since late February, while the U.S. military says it destroyed Iranian mine-laying boats near the vital oil chokepoint—an escalation that has heightened fears of prolonged disruption to energy and trade flows.
A new modelling study indicates that a weakening Atlantic Meridional Overturning Circulation is causing the Gulf Stream to drift northwards, with satellite data showing a 50-kilometre shift over 30 years. Researchers suggest this gradual change could precede an abrupt move serving as an early warning for a potential AMOC collapse. Such a collapse might lead to drastic cooling in Europe, though timelines remain uncertain.
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A new study warns that a shutdown of the Atlantic Meridional Overturning Circulation (AMOC) would trigger the release of up to 640 billion tonnes of carbon dioxide from the deep Southern Ocean near Antarctica. This feedback effect could raise global temperatures by an additional 0.2°C. Researchers at the Potsdam Institute for Climate Impact Research highlight the risk as humanity's emissions continue to weaken the key ocean current.
TotalEnergies CEO Patrick Pouyanné said on Monday that a toll would be preferable to a prolonged closure of the Strait of Hormuz, through which 20% of global oil and gas passes. He spoke at a conference in Washington on the sidelines of the IMF and World Bank spring meetings. He warned of supply tensions if the situation lasts beyond three months.
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Escalation of conflict between Iran, the United States, and Israel has led Iran to order the closure of the Strait of Hormuz, halting tanker traffic and driving global oil prices above US$80 per barrel. The effects extend to Europe, which is now reconsidering plans to end Russian gas imports, while Indonesia pushes for de-escalation via the D-8 organization and assures stable fuel supplies.
Prime Minister Sanae Takaichi expressed 'serious concern' over attacks on vessels around the Strait of Hormuz during an online G7 leaders' meeting, urging early de-escalation. Japan plans to lead in releasing oil reserves to avert an economic crisis through international coordination.
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US and Israeli forces struck Iran on February 28, prompting Iran's Islamic Revolutionary Guard Corps to declare the Strait of Hormuz unsafe for commercial passage. Vessel traffic fell by roughly 70% within hours. The closure compounds pressures on fashion supply chains already strained by Red Sea disruptions, tariffs, and rising freight costs.